Movable connection for seat

FIELD: movable connection with springy resistance for any type of seat.

SUBSTANCE: movable connection has first and second connection members which are designed for connection through shaft to provide inclination of seat caused by shifting of user's weight. Connection has first and second parallel plated springs with intermediate blocking member. Each plated spring is connected at the side of first end to first connection member and at the side of second end slidingly adjoins second connection member. First and second plated springs have pins of rotation which are offset relative to one another and relative to shaft.

EFFECT: compact and simplified construction and reduced weight of connection.

14 cl, 5 dwg

 

The scope of the invention

The present invention relates to a simple and compact rolling connection with the elasticity of a spring suitable for use with furniture such as a chair.

Prior art

There are several types of chairs, including moveable joints connecting the seat and the base frame, in particular office chairs. These chairs often have a rest position and two extreme end positions, the position of forward tilt and a more laid back position. Chairs are often equipped with a complex compound comprising a spring device to enable tilting of the chair between these positions and return the chair seat in its intermediate position of rest.

For example, French patent 2267068 describes the common connection used in office chairs, which uses a plate spring that provides resistance to the effects of tilt. However, this type of connection that uses a steel plate, multi-plate with a relatively large length to provide such resistance. Thus, the connection is extremely significantly, it is difficult to combine with such furniture as a chair, and causes a great way of springs. In addition, this connection only provides resistance in one direction nakanai no stopping devices, limiting the amplitude of the swing.

In addition, there are many different seats with folding backs, which uses a pivoting connection or the crossbar in different variants of implementation to facilitate such movement. Devices based on the friction force, or spring devices may be used to provide resistance to such movement. Mechanical devices tilt siderea in these chairs also complex and sometimes noticeable in the furniture.

Compounds of this type can also be placed in the seat of the chair, using the gasket seat, to provide a spring effect connection. This provides the possibility of creating a connection, which is smaller and less complex. The problem with this solution is that a relatively large force must be absorbed by the material of the gaskets without deformation. Therefore, the material must be relatively small to provide significant resistance. The gasket of this type is not particularly convenient, and it proved difficult to provide a gasket, which also has significant strength. To achieve significant strength an alternative solution was implemented compensation more padding, but it leads to an increase in the bulkiness of the furniture and affect its external the s type.

In the United Kingdom patent No. 1299740 described in connection with a dense flexible gasket that provides resistance to the inclination of the two connecting elements. However, this solution provides a very limited and inaccurate tilt and also allows adverse rotation of the connecting elements in the horizontal plane relative to each other. The gasket is subjected to aging and wear, especially in a tense state when changing the parameters of elasticity of the gasket. Over time, the connection ceases to be on the main bolt connecting the two coupling element, and expose his destructive wear, if it is regularly not to delay. This delay will also limit the angle.

Tilt siderea chair is desirable for several reasons. Office chairs chair is better adapted to the landing position of the user, depending on his movements. Such an active and changing the landing position is ergonomically more favorable for the body than a static landing position. Therefore, the tilt siderea chair felt more comfortable and gives the user a feeling of quality after sitting on the chair takes less effort.

It is therefore desirable to achieve this quality in a more simple chairs, such as chairs for dining tables or conference, and so on, the Lack of owls is temporal solution is the connections are complex and heavy devices that are not easy to adapt to the chairs with a simple design, light weight and, for example, when wishing to stack the chairs.

Thus, nowadays small and simple connection with the spring tension is light in weight for easy chairs in which the seat and backrest of the chair is able to tilt to extreme positions and to return to the rest position when the chair is not in use.

The invention

The purpose of the present invention is to provide a connection for a chair, which eliminates the above problems and imperfections, which had earlier decisions.

The purpose of the invention is achieved by means of a movable connection with the elasticity of the spring, suitable for siderea and containing the first and second connecting elements, which are connected to rotate a shaft to provide tilt siderea caused by the offset weight of the user; first and second parallel leaf spring with first and second ends, with an intermediate locking element, each plate spring from the first end attached to the first connecting element and from the second trailing end adjacent to the second connecting element, the first and verypractical springs each have an axis of rotation, displaced with respect to each other and relative to the shaft.

The connection, according to the present invention, consists of few parts, provides the creative use of materials such as fiberglass or composite materials in the springs, thus providing a compact connection with good functionality in relation to wear and tear.

Connection provides high rigidity with only two spring elements, besides small deflection provides good resistance to wear. In addition, the leaf spring of the present invention can be easily replaced for repair or adaptation to the user.

The compound of the present invention may have a form similar to cubic and can be easily adapted to the varieties of designs and mounted upside down, sideways, or at any other angle.

The connection can thus be manufactured and assembled at low cost using standard production equipment, which can be easily automated, and is lower cost for transportation and storage due to its small size and weight.

Brief description of drawings

Fig. 1 shows a view of the contours of the chair, placed according to the invention in the seat of the chair and connected the frame.

Fig. 2 shows a perspective view of the connection shown in Fig. 1.

Fig. 3 shows the section of the connection position of rest.

Fig. 4 shows the section of the connection of Fig. 1 in an alternative position.

Fig. 5 shows the section of the connection of Fig. 1 in an alternative position.

Detailed description

The preferred embodiment of the invention is described below in detail with reference to the figures. Option implementation example of the invention and does not limit the invention.

In the following description, the expressions "front" and "forward" describe the position of the user's face as he sits with his back to the chair in normal position, and the expression "back" and "back" refer to the opposite direction, unless stated differently.

In addition, the reference to the connection angle refers to the angle between the plane of the seat and the base, for example a floor. In the shown embodiments, this angle corresponds to the angle between the upper and lower surfaces of the described connections, but it will not always take place in alternative embodiments of the invention.

Option of carrying out the invention

As shown in Fig. 1, compound 1 according to the invention is used as a connection between the seat 100 of the chair and the carrier frame 200. The base frame 200 has four legs connected to the top of the mount, designed to attach the chair seat.

In this embodiment, compound 1, as shown in Fig. 2, contains two connecting elements, one of the lower connecting element 10 and one upper connecting element 20, which are connected by a horizontal shaft 30. The top element 20 can be tilted between two extreme positions relative to the bottom element 10 with which it is connected.

The bottom element 10 in this embodiment is basically parallel to the surface. The bottom element 10 must be attached to the base frame 200.

The top element 20 must be attached to the chair seat and to be essentially parallel to the seat of the chair. Frame 50 formed inside the padding of the chair and is a means of attaching the seat 100 to the top element 20. In this embodiment, the connection joint with the seat 100 of the chair. The benefits of the combined connection that prevents damage by crushing, dirt misses the connection and furniture acquire the best appearance.

Alternatively, the upper surface of the upper element 20 is used as a surface attached to the bottom surface of the chair seat or some other type of fastening of the seat.

Compound 1 can be placed in the top three positions, depending on the floor the position of the center of gravity of the user relative to the shaft 30, as a result of inclination of the elements 10 and 20 relative to each other.

In Fig. 3 connection 1 shown in a rest position, where the center of gravity 300 user is on the same line with the shaft 30. Hence the connection 1 has an initial angle α between the upper outer surface 21 of the connection and the plane, which may be any angle suitable for the intended use, and this angle in this embodiment, for example approximately 0°when the chair is used in a vertical position.

As shown in Fig. 3, the bottom element 10 is made in the form of a base with a protruding locking element 11, is attached to the shaft 30, and two plate springs 18 and 19 are located on each side of the blocking element 11 parallel to the shaft 30. Springs 18 and 19 attached to the underside of the bottom element 10 by means of clamping bolts 14, perpendicular to the shaft 30.

In Fig. 4 the connection shown in position tilt forward, in which the center of gravity of the user is located behind the shaft 30. In this position, the connection has an angle β, which in this embodiment is 8°. The spring 18 is in position tilt forward, providing resistance to forward bending of the upper element 20 due to the stop surface 22 to the spring 18. The top element 20 can be tilted forward until the spring of 18 (and the top element 20) is e abuts the protruding locking element 11. For the distribution of tensile stresses in the spring 18, the surface 22 of the locking element is curved.

In Fig. 5 connection 1 shown in position reclining back, in which the center of gravity of the user is located behind the shaft 30. In this position, the connection has an angle θ, which in this embodiment is 8°. The spring 19 in the same manner as described above, will provide resistance to the inclination of the upper coupling element due to prisloneniya surface 23 to the spring 19. The top element 20 can be tilted back until the spring 19 (and the top element 20) will not lean up against the speaker of the blocking element 11 with a curved surface 13.

Therefore, compound 1 has the elasticity of a spring, which returns the top element 20 to its rest position and returns the chair to the initial position when it is not affected by the user. In addition, the springs 18, 19 are smooth motion in the connection 1 and will provide smooth movement between the main positions. This will enable easy movement and improved preventive measures to avoid tipping over his chair.

In General, the spring tension must be adjusted to the user's weight, the weight of the seat, the angle between the seat and the chair back and seat position in the Assembly in relation to the connection.

The elasticity of the spring in with the unity 1 is provided by the springs 18, 19, which is preferably made of fiberglass. These springs can be made very hard and must meet the conditions outlined above. The spring tension can be adjusted by changing the thickness and width of the springs, the length or height of the spring at the request of the compounds and composition of the spring material. If desired, the spring tension can be adjusted by changing the distance between the shaft 30 and the fasteners 14 of the springs 18, 19.

The stiffness of the springs fiberglass provides the ability to manufacture more compact compounds compared with a similar connection that uses steel springs. Preferred are springs made of fiberglass, which can be used in many different types, and there is the possibility of reinforcement of various materials, such as carbon, Kevlar, etc.

The bending of the springs 18, 19 should not begin at the level of the shaft 30, but he moves from this level. This provides a stronger bending of the spring than usual spring joints for chairs. Due to the large difference in the length of the lever rotation for springs 18, 19 and the top element 20 provides precise gear ratio between the springs 18, 19 and the upper element.

Curved surfaces 12, 13 of the seal is important to prevent overvoltage of the springs 18, 19 due to vysokonapryazhennyh in the area of attachment to the lower element, leading to the destruction of the springs.

Due to the offset of the axis of rotation of the shaft 30 relative to the mounting springs springs will slide on the adjacent surfaces 22, 23 of the top element 20. Hence it is desirable to provide a protective screen between these parts. This shield can prevent wear and a clicking noise generated by contact between adjacent surfaces 22, 23 and spring during rotation of the connection.

The lower connecting element can be provided with fastening elements, such as guide devices, for connecting the connection 1 to the possible base or frame.

Similarly, the upper connecting element 20 can be provided with an upper outer surface 21 that is adapted to attach to the seat, for example, by means of bolts and/or guide devices.

Preferred method of communication depends on the model of the chair seat, backrest angle, the weight of the seat, the weight of the user and possible limitations due to the design of the supporting frame. Moreover, the attitude angles and distances will affect the resistance of a spring, on the angle and the stiffness of the spring. In the above embodiment, the size of the connection, i.e. height × width × length is 8 cm × 10cm × 8 cm in the initial position of the company and of peace, and form a very compact connection. The elements 10, 20 can be made of any suitable material, such as metal, plastic or composite material, preferably of metal, such as steel or aluminum.

Alternative implementation

In the above embodiment, the lower connecting member 10 includes a blocking element 11, which is at the top of the connecting element 20, but it is obvious that the opposite is also possible, and the connection can be established to the contrary. Hence, the upper element may be provided with one or more locking elements, which are at the bottom of the connecting element 10 with the respective adjacent surfaces. In addition, the blocking element may include a few protruding locking element interacting with the corresponding structures in the external connections; this design can provide additional adjacent surface and to provide a large contact area.

In an alternative embodiment, the permissible angle of inclination of the back may be greater than the permissible tilt forward. In addition, the resistance of the springs may be more forward than backward, or Vice versa. Deviations can be changed, adapting to mu the mu use, and for example can be in the range of 5-10°.

In another alternative embodiment, each spring 18, 19 can be divided into two or more parallel spring plates with different thickness relative to each other. In this embodiment, the spring tension will increase when the upper element 20 rotates and comes in contact with a large number of springs during rotation. Alternatively, the parallel spring plates can be displaced relative to each other with different distances to the shaft 30 to achieve a similar effect.

In addition, the connection according to the invention can be used for any seat of a chair or furniture with any design. This chair can also be backless, for example a chair, where the user has the position of the landing, leaning on his knees and on his back.

In addition, the supporting frame may be of any design, and several chairs with compound 1, for example, can be mounted in a row on such a carrier frame, forming a number that is similar to the bench, row seats at the stadium, cinema or theatre, etc.

1. Flexible connection for the seat containing the first and second connecting elements connected to rotate with the shaft to allow tilting of the seat caused by the shift of weight to use is on of the motor, characterized in that it includes first and second parallel leaf spring having each first and second end and an intermediate locking element, each plate spring attached from the first end to the first connecting element adjacent side of the second trailing end to the second connecting element and has an axis of rotation that is offset from the axis of rotation of the other of the spring and the shaft.

2. Flexible connection according to claim 1, characterized in that the spring is in contact with the deviation of the curved surfaces of the blocking element.

3. Flexible connection according to claim 1 or 2, characterized in that the spring is able to be adjusted by adjusting the distance from the axis of rotation of the shaft to the mounting springs.

4. Flexible connection according to claim 1 or 2, characterized in that the springs are divided into two or more parallel spring plates having different thickness and/or placed at different distances from the shaft, providing a sequentially increasing spring resistance when the upper coupling element while rotating in contact with a large number of springs.

5. Flexible connection according to claim 1 or 2, characterized in that its external dimensions, i.e. height × width × length, approximately 8 cm × 10cm × 8 see

6. Flexible connection according to claim 1 or 2, characterized in that the springs are made of fiberglass.

7. Flexible connection according to claim 6, characterized in that the springs are divided into two or more parallel spring plates having different thickness and/or placed at different distances from the shaft, providing a sequentially increasing spring resistance when the upper coupling element while rotating in contact with a large number of springs.

8. Flexible connection according to claim 6, characterized in that its external dimensions, i.e. height × width × length, approximately 8 cm × 10cm × 8 see

9. Flexible connection according to claim 6, characterized in that the fiber reinforced carbon and/or Kevlar.

10. Flexible connection according to claim 9, characterized in that the springs are divided into two or more parallel spring plates having different thickness and/or placed at different distances from the shaft, providing a sequentially increasing spring resistance when the upper coupling element while rotating in contact with a large number of springs.

11. Flexible connection according to claim 4, characterized in that its external dimensions, i.e. height × width × length, approximately 8 cm × 10cm × 8 see

12. Movably the compound according to claim 9, characterized in that its external dimensions, i.e. height × width × length, approximately 8 cm × 10cm × 8 see

13. The use of flexible connection according to one of claims 1 to 12 for connecting the seat and the supporting frame of the chair.

14. Use item 13, in which the flexible connection is placed in the seat.



 

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