CN212546268U

CN212546268U - Novel variable pitch mechanism

Info

Publication number: CN212546268U
Application number: CN202020894292.9U
Authority: CN
Inventors: 卢穗娟; 杨春皊
Original assignee: Chunling Shenzhen Pension Service Technology Co ltd
Current assignee: Chunling Shenzhen Pension Service Technology Co ltd
Priority date: 2020-05-25
Filing date: 2020-05-25
Publication date: 2021-02-19
Anticipated expiration: 2030-05-25

Abstract

The utility model relates to a chair accessory makes technical field, concretely relates to novel variable distance mechanism, include: the chair comprises chair legs, a telescopic part and a rolling part, wherein the rolling part is fixedly arranged at the movable end of the telescopic part, the fixed end of the telescopic part is fixedly arranged in the chair legs, the telescopic part is formed by sequentially connecting an upper supporting seat, a spring and a lower supporting seat, and the fixed end of the rolling part penetrates through the lower supporting seat and is fixedly connected with the spring; the inside slide that can supply the lower carriage slides along vertical direction that is provided with of chair leg, the flexible volume that the spring produced drives the lower carriage is in slide slides in the slide, the lower carriage drives the portion of rolling is flexible. The ground is protected from being scratched, the mechanism is moved in a silent mode, faults such as looseness, abnormal sound and blocking do not occur, meanwhile, the mechanism is flexible and free to apply, convenient and reliable, and the mechanism is more suitable for old people to move and use and does not generate noise.

Description

Novel variable pitch mechanism

Technical Field

The utility model relates to a chair accessory makes technical field, concretely relates to novel variable pitch mechanism.

Background

Dining table chair is an utensil for food and beverage, and the material is more extensive. The height is 720mm-760mm, and the dining table and chair is an appliance which is used in daily life and social activities of human beings and has the functions of sitting, lying, leaning, dining and the like. Usually, the device is assembled by a plurality of parts and components according to a certain joint mode. Chinese character of "Jia Miao" (Chinese character of Japanese pagoda tree and willow mountain catalpa oak) is: it is suitable for the front wood when it is furniture. It is obvious that since ancient times, dining tables and chairs in China always use wood as main materials, mainly wood furniture.

Most dining tables and chairs in the prior art adopt a combination mode of chair legs and telescopic trundles, and when one dining table and chair is not subjected to any external load, the roller frame body extends out by means of elastic force generated by the pre-compression amount of the spring. When the chair needs to be moved, the chair is manually inclined to assist the force; when the chair is under the action of load, the spring retracts under the action of external force, the whole roller frame body retracts, and the chair legs are contacted with the ground.

However, the following drawbacks exist in the prior art that affect the use of retractable casters, including: the guide positioning precision of the roller frame body is low, and faults such as looseness, sound, blocking and the like are easy to occur; the roller can only move in one direction, and can not change direction flexibly, so that the use is inconvenient; the chair legs are not easy to process and manufacture, so the manufacturing cost is high and the precision is low; the rubber cushion arranged on the chair leg is easy to fall off and scratch the ground.

In view of this, need a novel variable pitch mechanism urgently, through the implementation of this scheme, overcome above-mentioned prior art's shortcoming to reach the protection ground and not by the fish tail, the silence removes, and the mechanism does not appear not become flexible, abnormal sound, card trouble such as dying, uses nimble freely simultaneously, and is convenient and reliable, more is fit for old person and removes the use, does not produce the noise.

SUMMERY OF THE UTILITY MODEL

In order to solve the deficiencies of the prior art, the utility model aims to provide a novel variable pitch mechanism, through the implementation of this scheme, overcome above-mentioned prior art's shortcoming to reach protection ground not by the fish tail, the silence removes, and the mechanism disappearance is not become flexible, abnormal sound, card trouble such as dead, uses in a flexible way freely simultaneously, and is convenient and reliable, more is fit for the old person and removes the use, does not produce the noise.

In order to realize the above object, the technical scheme of the utility model is that: a novel variable pitch mechanism comprising: the chair comprises chair legs, a telescopic part and a rolling part, wherein the rolling part is fixedly arranged at the movable end of the telescopic part, the fixed end of the telescopic part is fixedly arranged in the chair legs, the telescopic part is formed by sequentially connecting an upper supporting seat, a spring and a lower supporting seat, and the fixed end of the rolling part penetrates through the lower supporting seat and is fixedly connected with the spring; the inside slide that can supply the lower carriage slides along vertical direction that is provided with of chair leg, the flexible volume that the spring produced drives the lower carriage is in slide slides in the slide, the lower carriage drives the portion of rolling is flexible.

Further, the chair leg comprises: the chair leg, protective sheath, landing leg, countersunk screw and slipmat are constituteed, the landing leg passes through countersunk screw fixed mounting be in on the chair leg internal diameter face, protective sheath fixed mounting be in on the chair foot external diameter face, slipmat fixed mounting be in chair leg and ground contact jaw.

Further, go up the supporting seat setting in the chair leg top and with landing leg internal diameter fixed connection, go up the supporting seat with spring fixed connection, the terminal fixedly connected with of spring the under bracing seat, the under bracing seat slidable install in on the landing leg internal diameter.

Furthermore, the upper supporting seat and the lower supporting seat are H-shaped, one end of the spring is fixedly installed at the lower groove of the upper supporting seat, and the movable end is fixedly installed at the upper groove of the lower supporting seat.

Furthermore, threaded holes are formed in two side beams of the lower groove of the lower support seat, and positioning pins can be installed in the threaded holes in a threaded mode.

Furthermore, the tail end of the supporting leg is provided with a slideway matched with the positioning pin, and the positioning pin can slide in the slideway.

Further, the scroll part includes: the universal ball is rotatably installed in the screw seat, a screw is fixedly installed at the top of the screw seat, and the screw penetrates through the lower supporting seat lower groove and is fixedly connected with the movable end of the spring.

Has the advantages that:

according to the novel variable-pitch mechanism provided by the utility model, the universal ball and the lower supporting seat are fixedly arranged, and the lower supporting seat and the inner wall of the supporting leg are matched to ensure the extending and retracting precision of the universal ball, so that the faults of looseness, sound, blocking and the like can not occur; the universal ball can realize the characteristic of omnidirectional movement, and overcomes the defect of unidirectional object carrying; the processing cost of each structure is low, and the precision is high; the anti-slip pad is added at the flange at the bottom of the landing leg, so that the landing leg is not easy to fall off and scratch the ground. The protection ground can not be scratched, the silence removes, and trouble such as not hard up, abnormal sound, card die do not appear in the mechanism, uses in a flexible way simultaneously, and is convenient and reliable, more is fit for old person and removes the use, does not produce the noise.

Drawings

Fig. 1 is a schematic cross-sectional view of a novel variable pitch mechanism of the present invention;

the labels in the figure are: 1-chair leg, 2-telescopic part, 3-rolling part, 11-chair foot, 12-protective sleeve, 13-supporting leg, 14-countersunk screw, 15-non-slip mat, 16-positioning pin, 21-upper supporting seat, 22-spring, 23-lower supporting seat, 31-universal ball, 32-screw seat, 33-screw, 131-slideway, 211-upper supporting seat lower groove, 231-lower supporting seat upper groove and 232-lower supporting seat lower groove.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by a person skilled in the art based on the embodiments of the present invention belong to the protection scope of the present invention.

As shown in the figure, the utility model discloses a novel variable distance mechanism, include: the chair comprises chair legs 1, a telescopic part 2 and a rolling part 3, wherein the rolling part 3 is fixedly arranged at the movable end of the telescopic part 2, the fixed end of the telescopic part 2 is fixedly arranged in the chair legs 1, the telescopic part 2 is formed by sequentially connecting an upper supporting seat 21, a spring 22 and a lower supporting seat 23, and the fixed end of the rolling part 3 penetrates through the lower supporting seat 23 and is fixedly connected with the spring 22; the chair leg 1 is internally provided with a slide 131 for the lower support seat 23 to slide along the vertical direction, the telescopic amount generated by the spring 22 drives the lower support seat 23 to slide in the slide 131, and the lower support seat 23 drives the rolling part 3 to stretch.

In this embodiment, the leg 1 includes: chair foot 11, protective sheath 12, landing leg 13, countersunk screw 14 and slipmat 15 constitute, landing leg 13 passes through countersunk screw 14 fixed mounting be in on the 1 internal diameter face of chair leg, protective sheath 12 fixed mounting be in on the 11 external diameter face of chair foot, slipmat 15 fixed mounting be in chair leg 1 and ground contact jaw.

In this embodiment, the upper supporting seat 21 is disposed at the top of the chair leg 1 and is fixedly connected to the inner diameter of the leg 13, the upper supporting seat 21 is fixedly connected to the spring 22, the end of the spring 22 is fixedly connected to the lower supporting seat 23, and the lower supporting seat 23 is slidably mounted on the inner diameter of the leg 13.

In this embodiment, the upper support seat 21 and the lower support seat 23 are H-shaped, one end of the spring 22 is fixedly mounted at the lower groove 211 of the upper support seat, and the movable end is fixedly mounted at the upper groove 231 of the lower support seat.

In this embodiment, threaded holes are formed in two side beams of the lower groove 232 of the lower support seat, and the positioning pin 16 can be installed in the threaded holes in a threaded manner.

In this embodiment, the slide 131 matched with the positioning pin 16 is formed at the end of the supporting leg 13, and the positioning pin 16 can slide in the slide 131.

In this embodiment, the scroll portion 3 includes: the universal ball 31 is rotatably installed in the screw seat 32, a screw 33 is fixedly installed at the top of the screw seat 32, and the screw 33 penetrates through the lower support seat lower groove 232 and is fixedly connected with the movable end of the spring 22.

The working principle is as follows:

during operation, when the chair is not loaded by any external load, the outer diameter of the lower support seat 23 of the spring 22 is extended along the inner diameter of the leg 13 by the elastic force generated by the pre-compression amount of the spring 22 installed between the upper support seat 21 and the lower support seat 23, and when the extended end of the positioning pin 16 installed on the lower support seat 23 is positioned at the lowest end of the slide groove of the leg 13, the screw seat 32 and the bottom end of the universal ball 31, which are installed together, are extended out of the bottom end of the non-slip mat 15 and are in contact with the ground. When the chair needs to be moved, the chair is inclined by an angle by manually holding the upper part of the backrest of the chair, the chair leg 11 which uses the novel variable-distance mechanism is arranged on the ground, the other two chair legs 11 are lifted off the ground, and the chair is easily moved and slid under the assistance of the backrest of the handheld chair.

When the chair is subjected to an external load, for example, when a person sits on the chair, the legs 11, the upper support seat 21, the legs 13, the protective sleeve 12 and the non-slip mat 15 which are fixedly arranged together are simultaneously pressed down, at the moment, the outer diameters of the lower support seats 23 of the positioning pins 16, the universal balls 31 and the screw seats 32 which are fixedly arranged together are retracted along the inner diameter of the legs 13, the outer extending ends of the positioning pins 16 slide along the sliding grooves of the legs 13, and the non-slip mat 15 is stably contacted with the ground.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not intended to limit the present invention, and all modifications, equivalents, improvements and the like that are within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims

1. A novel variable pitch mechanism, comprising: the chair comprises chair legs (1), a telescopic part (2) and a rolling part (3), wherein the rolling part (3) is fixedly arranged at the movable end of the telescopic part (2), the fixed end of the telescopic part (2) is fixedly arranged in the chair legs (1), the telescopic part (2) is formed by sequentially connecting an upper supporting seat (21), a spring (22) and a lower supporting seat (23), and the fixed end of the rolling part (3) penetrates through the lower supporting seat (23) and is fixedly connected with the spring (22); the chair leg (1) is internally provided with a slide way (131) which can supply the lower support seat (23) to slide along the vertical direction, the telescopic amount generated by the spring (22) drives the lower support seat (23) to slide in the slide way (131), and the lower support seat (23) drives the rolling part (3) to stretch out and draw back.

2. A new type of variable pitch mechanism as claimed in claim 1, characterised in that said chair leg (1) comprises: chair foot (11), protective sheath (12), landing leg (13), countersunk screw (14) and slipmat (15) are constituteed, landing leg (13) are passed through countersunk screw (14) fixed mounting be in on chair leg (1) inside diameter face, protective sheath (12) fixed mounting be in on the chair foot (11) outside diameter face, slipmat (15) fixed mounting be in the flange department of landing leg (13) bottom.

3. The novel variable-pitch mechanism as claimed in claim 2, characterized in that the upper support seat (21) is arranged at the top inside the chair leg (1) and fixedly connected with the inner diameter of the leg (13), the upper support seat (21) is fixedly connected with the spring (22), the lower support seat (23) is fixedly connected with the end of the spring (22), and the lower support seat (23) is slidably mounted on the inner diameter of the leg (13).

4. A novel variable pitch mechanism as claimed in claim 3, wherein said upper support (21) and said lower support (23) are H-shaped, one end of said spring (22) is fixedly mounted in the lower recess (211) of the upper support, and said movable end is fixedly mounted in the upper recess (231) of the lower support.

5. The novel variable-pitch mechanism as claimed in claim 4, characterized in that threaded holes are formed in the side beams of the lower support seat lower groove (232), and the positioning pin (16) can be threadedly mounted in the threaded holes.

6. A novel variable-pitch mechanism according to claim 5, characterized in that the end of the leg (13) is provided with the slideway (131) matched with the positioning pin (16), and the positioning pin (16) can slide in the slideway (131).

7. The new variable pitch mechanism according to claim 6 wherein the rolling section (3) comprises: universal ball (31) and screw rod seat (32), universal ball (31) rotate to be installed in screw rod seat (32), screw rod seat (32) top fixed mounting has screw rod (33), screw rod (33) pass lower carriage lower recess (232) with spring (22) expansion end fixed connection.