Handrail lifting structure

Abstract

The utility model relates to a handrail lifting structure which is mainly characterized in that a control rod of a control unit is arranged in a supporting unit, the supporting unit is arranged in a containing cavity of a guide unit, and a positioning ball is arranged in each of through holes in the two sides of the supporting unit. The two positioning beads are respectively clamped with or separated from the positioning pits formed in the cavity walls of the two sides of the accommodating cavity of the guide unit, so that when the height of the handrail is adjusted and the control rod is pulled upwards, the positioning beads fall into the pits in the two sides of the control rod and are separated from the positioning pits formed in the accommodating cavity of the guide unit; when the supporting unit moves up and down in the containing cavity of the guiding unit, the two positioning balls can abut against and make contact with the cavity walls on the two sides of the containing cavity respectively, so that the supporting unit does not deflect when moving, and the lifting smoothness of the handrail is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of armrests of chairs, in particular to an armrest lifting structure. Background Art

[0002] Most existing chairs are provided with armrests for users to place their arms on. Generally, the armrests of chairs are mostly fixed and cannot be adjusted in height. However, since everyone has different heights and body shapes, the armrests that cannot be adjusted in height can easily cause discomfort when sitting in the chair.

[0003] Therefore, some chair manufacturers have developed patents such as the "lifting armrest" with publication number TWI519261B in Taiwan, China, the "armrest height adjustment device" with publication number TWM630724U, and the "seat armrest lifting mechanism" with publication number TWM421762U. Although the chair armrests disclosed in many of these patents can be adjusted in height, their structures are quite complicated, resulting in expensive manufacturing costs and a lot of time required for assembly, which does not meet the modern low-cost, high-capacity industry needs. In addition, their armrest lifting structures all adopt a single-side positioning design, so the armrest is prone to deflection when it is lifted and lowered, and it rubs against the wall of the cavity that accommodates the armrest, resulting in defects such as the armrest not being able to lift smoothly.

[0004] Therefore, in view of the above-mentioned deficiencies in the manufacture and use of the existing handrail lifting structure, the inventor has developed the present utility model with the assistance of his many years of manufacturing and design experience and knowledge in the relevant field and through various ingenuity. Utility Model Content

[0005] The utility model relates to an armrest lifting structure, and its main purpose is to provide an armrest lifting structure with simple structure, low cost, time-saving assembly and smooth lifting and adjusting performance.

[0006] In order to achieve the above-mentioned implementation objectives, the inventors have developed the following handrail lifting structure, comprising:

[0007] a handrail support, wherein a hollow portion is formed in the handrail support;

[0008] A guide unit is accommodated in the hollow part of the handrail bracket, and a cavity is provided in the guide unit, and a set of holes is provided at the upper end of the guide unit, the set of holes is communicated with the cavity, and a plurality of positioning pits are formed on the cavity walls on opposite sides of the cavity of the guide unit and arranged in a longitudinally spaced manner;

[0009] A support unit, the support unit is correspondingly accommodated in the housing of the guide unit by the sleeve hole at the upper end of the guide unit, a longitudinal channel is provided in the support unit, a through hole is provided on opposite sides of the support unit, the two through holes are respectively communicated with the longitudinal channel, a positioning bead is respectively provided in the two through holes, and the support unit is provided with a notch at one side above the longitudinal channel, a grouping part is formed at the upper end of the support unit, and the grouping part is combined with an armrest pad;

[0010] A control unit includes a control rod, which is inserted into the longitudinal channel of the support unit. A pit is provided on each of the opposite sides of the control rod, and a guide angle is formed at the upper edge of the pit. Two positioning beads are movably accommodated or disengaged in the two pits respectively. The two positioning beads are correspondingly engaged or separated from any positioning pit provided on the cavity walls on both sides of the cavity of the guide unit. A handle is provided on one side of the upper end of the control rod, and the handle is exposed to the outside through the notch provided in the support unit. At least one elastic member is provided between the upper end of the control rod and the bottom end of the armrest pad, and the two ends of the elastic member are respectively positioned against the control rod and the armrest pad.

[0011] As described above, the armrest lifting structure, wherein the guide unit is provided with a longitudinal long slot hole at at least one end surface thereof, the longitudinal long slot hole is communicated with the cavity, a guide block is provided at at least one end surface of the support unit, and the guide block is correspondingly arranged in the longitudinal long slot hole of the guide unit.

[0012] In the armrest lifting structure as described above, the guiding unit is composed of two opposite shells connected to form the cavity between the two shells, and the sleeve hole is provided at the upper end of one shell.

[0013] By this, when the height of the armrest is adjusted by pulling the control rod upward, the positioning beads will fall into the pits on both sides of the control rod and separate from the positioning pits set in the cavity of the guide unit. Then, the support unit assembled with the armrest pad can be pulled to adjust the height of the armrest. When the support unit moves up and down in the cavity of the guide unit, the two positioning beads can respectively contact the cavity walls on both sides of the cavity, so that the support unit will not deviate when moving, thereby improving the smoothness of the armrest lifting. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The drawings described herein are only for explanation purposes and are not intended to limit the scope of the present invention in any way. In addition, the shapes and proportional dimensions of the components in the drawings are only for illustration purposes to help understand the present invention, and are not intended to specifically limit the shapes and proportional dimensions of the components of the present invention. Under the guidance of the present invention, those skilled in the art can select various possible shapes and proportional dimensions to implement the present invention according to specific circumstances.

[0015] Figure 1 It is a three-dimensional exploded view of the utility model;

[0016] Figure 2 It is a front cross-sectional view of the utility model;

[0017] Figure 3 It is a side sectional view of the utility model;

[0018] Figure 4 This is the usage state diagram (I) of the utility model;

[0019] Figure 5 This is the usage state diagram (II) of the present utility model.

[0020] Description of Reference Numerals

[0021] 1: Handrail bracket

[0022] 11: Hollow part

[0023] 2: Guidance unit

[0024] 21: Shell

[0025] 22: Cavity

[0026] 221: Positioning pit

[0027] 23: Hole

[0028] 24: Longitudinal slot hole

[0029] 3: Support unit

[0030] 31: Longitudinal channel

[0031] 32: Guide block

[0032] 33: Through hole

[0033] 34: Notch

[0034] 35: Assembly Department

[0035] 4: Control unit

[0036] 41: Control rod

[0037] 411: pit

[0038] 412: Chamfer

[0039] 413: Grip

[0040] 42: Elastic parts

[0041] 5: Positioning beads

[0042] 6: Armrest pad DETAILED DESCRIPTION

[0043] The details of the present invention can be more clearly understood by combining the accompanying drawings with the description of the specific embodiments of the present invention. However, the specific embodiments of the present invention described herein are only used for the purpose of explaining the present invention and cannot be understood as limiting the present invention in any way. Under the guidance of the present invention, technicians can conceive of any possible variations based on the present invention, which should be considered to belong to the scope of the present invention.

[0044] Unless otherwise specified, the directions of up, down, left, and right mentioned in this document are all based on the directions shown in this utility model. Figure 1 The up, down, left and right directions in the figure shall prevail and are explained here.

[0045] In order to make the technical means of the utility model and the effects that can be achieved more completely and clearly disclosed, the detailed description is as follows, please refer to the drawings and the accompanying drawings:

[0046] First, see Figure 1 to Figure 3 As shown, the handrail lifting structure of the utility model mainly includes:

[0047] An armrest bracket 1, the armrest bracket 1 can be connected to the seat, and a hollow portion 11 is formed in the armrest bracket 1;

[0048] A guide unit 2 is accommodated in the hollow portion 11 of the handrail bracket 1. The guide unit 2 is composed of two opposite shells 21 connected to form a cavity 22 between the two shells 21. A set of holes 23 is provided on the upper end of one of the shells 21 to communicate with the cavity 22. In addition, a longitudinal long slot hole 24 is provided on the end surface of at least one shell 21, and the longitudinal long slot hole 24 communicates with the cavity 22. A plurality of positioning pits 221 are formed on the cavity walls on opposite sides of the cavity 22 and are arranged in a longitudinal interval.

[0049] A support unit 3, wherein the support unit 3 is correspondingly accommodated in the housing 22 of the guide unit 2 by a sleeve hole 23 provided on a shell 21 of the guide unit 2, a longitudinal channel 31 is provided in the support unit 3, a guide block 32 is provided on at least one end surface of the support unit 3, and the guide block 32 is correspondingly arranged in the longitudinal long slot 24 of the guide unit 2, a through hole 33 is provided on opposite sides of the support unit 3, and the through hole 33 is communicated with the longitudinal channel 31 of the support unit 3, and a positioning bead 5 is respectively provided in the two through holes 33, and a notch 34 is provided on one side above the longitudinal channel 31 of the support unit 3, and a grouping portion 35 is formed on the upper end of the support unit 3 to be assembled with an armrest pad 6;

[0050] A control unit 4 includes a control rod 41, and the control rod 41 is inserted into the longitudinal channel 31 of the support unit 3. A pit 411 is provided on opposite sides of the control rod 41, and a guide angle 412 inclined toward the pit 411 is formed at the upper edge of the pit 411. The two positioning beads 5 are movably accommodated or disengaged in the two pits 411 respectively, so that the two positioning beads 5 are correspondingly engaged or separated from any positioning pit 221 provided on the cavity walls on both sides of the cavity 22 of the guide unit 2. A handle 413 is provided on one side of the upper end of the control rod 41, and the handle 413 is protruded from the notch 34 provided on the support unit 3. In addition, at least one elastic member 42 is provided between the upper end of the control rod 41 and the bottom end of the armrest pad 6, and the two ends of the elastic member 42 are respectively positioned against the control rod 41 and the armrest pad 6.

[0051] Accordingly, when assembling, firstly, the control rod 41 of the control unit 4 is inserted into the longitudinal channel 31 of the support unit 3, then the elastic member 42 of the control unit 4 is arranged between the upper end of the control rod 41 and the bottom end of the armrest pad 6, and then the armrest pad 6 is locked and combined with the assembly portion 35 arranged at the upper end of the support unit 3, and then the support unit 3 is placed in the receiving cavity 22 of the guide unit 2 through the sleeve hole 23 arranged at the upper end of the shell 21 of the guide unit 2, and the guide block 32 arranged at at least one end surface of the support unit 3 is correspondingly arranged in the longitudinal long slot 24 arranged at at least one end surface of the shell 21 of the guide unit 2. In addition, the control rod 41 is pushed downward by the elastic member 42, so that the two positioning beads 5 are separated from the pits 411 on both sides of the control rod 41, and the two side rod walls of the control rod 41 push the two positioning beads 5 outward, so that the positioning beads 5 located at the through holes 33 on both sides of the support unit 3 are respectively locked and positioned with the positioning pits 221 set by the cavity walls on both sides of the cavity 22 of the guide unit 2, and then the previously assembled control unit 4, support unit 3 and guide unit 2 are accommodated in the hollow portion 11 of the armrest bracket 1, and the armrest pad 6 is located above the armrest bracket 1, so as to complete the assembly of the armrest of the utility model.

[0052] Therefore, when the user wants to adjust the height of the armrest, please refer to Figure 4As shown, the handle 413 of the control rod 41 is held, and force is applied to pull the control rod 41 upward. When the control rod 41 moves upward and the recesses 411 on both sides thereof are displaced to the two positioning beads 5, the two positioning beads 5 slide into the two recesses 411 along the guide angles 412 set on the upper edges of the two recesses 411. At this time, the two positioning beads 5 are separated from the locking state of the positioning pits 221 set on the walls of the two sides of the cavity 22 of the guide unit 2, and retracted into the through holes 33 on both sides of the support unit 3. The user continues to hold the armrest pad 6 to apply force to pull the support unit 3 assembled with the armrest pad 6 upward or push it downward. To the required height, when the support unit 3 moves up or down, the positioning beads 5 retracted into the through holes 33 on both sides of the support unit 3 have their bead walls in point contact with the walls on both sides of the cavity 22 of the guide unit 2. Therefore, the support unit 3 will not deviate when moving up or down, and will contact and rub with the walls of the cavity 22, so as to improve the smoothness of the armrest lifting and lowering adjustment. In addition, when the user applies force to move the support unit 3 up or down through the armrest pad 6, the support unit 3 can be guided by the guide block 32 located in the longitudinal long slot 24 on the end face of the guide unit 2, so as to further improve the smoothness of the armrest lifting and lowering adjustment.

[0053] Please also read Figure 5 As shown, when the user adjusts the armrest to the desired height, the user can release the force applied to the handle 413 of the control rod 41. At this time, the elastic member 42 compressed by the upward movement of the control rod 41 will return to its original state and push the control rod 41 downward to reset. Then, the two positioning beads 5 slide out of the two recesses 411 along the guidance of the guide angles 412 set on the upper edges of the two side recesses 411 of the control rod 41, and then the two side rod walls of the control rod 41 push the two positioning beads 5 outward so that the two positioning beads 5 are re-engaged with the positioning pits 221 set on the two side walls of the cavity 22 of the guide unit 2 to fix the adjusted height of the armrest. In this way, the design of the two positioning beads 5 engaging the positioning pits 221 on both sides of the cavity 22 of the guide unit 2 can not only increase the stability of the armrest when it is fixed, but also avoid the armrest from shaking improperly, so as to improve the comfort of the user's hand when placed on the armrest.

[0054] Here, the armrest lifting structure of the utility model only needs to pull the control lever 41 to adjust the armrest, which is extremely convenient to operate. The armrest lifting structure of the utility model only includes a guide unit 2, a support unit 3 and a control unit 4, which can greatly simplify the parts. In addition to effectively saving manufacturing costs, it is also relatively convenient and time-saving in assembly to meet the modern low-cost, high-capacity industry needs. Moreover, since the utility model has fewer parts, it is not easy for the parts to fall off or be damaged at the assembly point, which is beneficial to increase the service life of the chair and save maintenance costs.

[0055] The aforementioned embodiments or drawings do not limit the implementation methods of the present utility model. Any appropriate changes or modifications made by ordinary technicians in the relevant technical field should be deemed to be within the protection scope of the present utility model.

[0056] It can be seen from the above structure and implementation mode that the utility model has the following advantages:

[0057] 1. The armrest lifting structure of the utility model only needs to pull the control lever to adjust the armrest, which is very convenient to operate.

[0058] 2. The armrest lifting structure of the utility model is provided with positioning beads in the through holes on both sides of the support unit. The two positioning beads can respectively contact with the cavity walls on both sides of the guide unit. Thereby, when the support unit moves up and down, it can prevent the support unit from being improperly deflected and rubbing against the cavity walls, so as to improve the smoothness of the armrest lifting adjustment.

[0059] 3. The armrest lifting structure of the present invention only includes a guide unit, a support unit and a control unit, which greatly simplifies the parts, thereby effectively saving manufacturing costs and assembly hours to meet the modern low-cost, high-capacity industry needs.

[0060] 4. The armrest lifting structure of the present invention has fewer parts, so it can effectively avoid the probability of damage such as falling off at the assembly point of the parts, thereby increasing the service life of the chair and saving maintenance costs.

[0061] In summary, the embodiments of the utility model can indeed achieve the expected effects, and the specific structure recorded therein has not only never been seen in similar products, but has also not been disclosed before the application. It fully complies with the provisions and requirements of the Patent Law, and an application for a utility model patent is now filed in accordance with the law.

Claims

1. A handrail lifting structure, characterized in that: The handrail lifting structure comprises: a handrail support, wherein a hollow portion is formed in the handrail support; A guide unit is accommodated in the hollow part of the handrail bracket, and a cavity is provided in the guide unit, and a set of holes is provided at the upper end of the guide unit, the set of holes is communicated with the cavity, and a plurality of positioning pits are formed on the cavity walls on opposite sides of the cavity of the guide unit and arranged in a longitudinally spaced manner; A support unit, the support unit is correspondingly accommodated in the housing of the guide unit by the sleeve hole at the upper end of the guide unit, a longitudinal channel is provided in the support unit, a through hole is provided on opposite sides of the support unit, the two through holes are respectively communicated with the longitudinal channel, a positioning bead is respectively provided in the two through holes, and a notch is provided on one side above the longitudinal channel of the support unit, a grouping part is formed at the upper end of the support unit, and the grouping part is combined with an armrest pad; A control unit includes a control rod, which is inserted into the longitudinal channel of the support unit. A pit is provided on each of the opposite sides of the control rod, and a guide angle is formed at the upper edge of the pit. Two positioning beads are movably accommodated or disengaged in the two pits respectively. The two positioning beads are correspondingly engaged or separated from any positioning pit provided on the cavity walls on both sides of the cavity of the guide unit. A handle is provided on one side of the upper end of the control rod, and the handle is exposed to the outside through the notch provided in the support unit. At least one elastic member is provided between the upper end of the control rod and the bottom end of the armrest pad, and the two ends of the elastic member are respectively positioned against the control rod and the armrest pad.

2. The handrail lifting structure according to claim 1, characterized in that: The guide unit is provided with a longitudinal long slot hole at at least one end surface thereof, the longitudinal long slot hole is communicated with the cavity, and a guide block is provided at at least one end surface of the support unit, and the guide block is correspondingly arranged in the longitudinal long slot hole of the guide unit.

3. The handrail lifting structure according to claim 1, characterized in that: The guiding unit is composed of two opposite shells connected to each other, the cavity is formed between the two shells, and the sleeve hole is arranged at the upper end of one shell.

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