TWI880781B - Armrest lifting structure - Google Patents

Abstract

This invention relates to an armrest lifting structure, primarily includes a control rod of a control unit in a support unit. The support unit is arranged in a cavity of a guide unit. Each of the two sides of the support unit has a through hole containing a positioning bead, which can engage with or disengage from positioning recesses on the two side walls of the cavity of the guide unit. When the armrest height is adjusted by lifting the control rod upwards, the positioning beads fall into the recesses on the sides of the control rod, thereby disengaging from the positioning recesses of the cavity of the guide unit. Consequently, the support unit assembled with the armrest pad can be pulled to adjust the height of the armrest. During the vertical movement of the support unit in the cavity of the guide unit, the two positioning beads contact the side walls of the cavity, preventing the support unit from tilting and ensuring smooth armrest lifting.

Description

Handrail lifting structure

This invention relates to the field of chair armrest technology, especially an armrest lifting structure.

According to the information, most existing chairs have armrests for users to place their arms on. Generally, the armrests of chairs are 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.

Therefore, some chair manufacturers have developed patents such as Taiwan Announcement No. I519261 "Lifting Armrest", Taiwan Announcement No. M630724 "Armrest Height Adjustment Device" and Taiwan Announcement No. M421762 "Chair Armrest Lifting Mechanism". Although the chair armrests disclosed in these patents can be adjusted in height, their structures are quite complicated, resulting in high manufacturing costs and more man-hours for assembly, which does not meet the modern low-cost, high-productivity industry needs. In addition, their armrest lifting structures all adopt a single-side positioning design, so the armrest is prone to deflection during lifting and lowering, and rubs against the cavity wall of the cavity containing the armrest, resulting in defects such as uneven lifting of the armrest.

Therefore, the inventor, in view of the above-mentioned deficiencies in the manufacturing and use of the existing handrail lifting structure, has developed this invention with the assistance of his many years of manufacturing and design experience and knowledge in related fields and after many ingenuities.

The present invention 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.

In order to achieve the above-mentioned implementation purpose, the inventors have developed the following handrail lifting structure, which includes: a handrail bracket, wherein a hollow portion is formed in the handrail bracket; a guide unit is accommodated in the hollow portion 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 to communicate with the cavity, and two opposite side walls of the cavity of the guide unit are respectively formed The guide unit has a plurality of positioning pits arranged at intervals in the longitudinal direction; a support unit is arranged so that the support unit is accommodated in the cavity of the guide unit corresponding to the sleeve hole at the upper end of the guide unit, and a longitudinal channel is arranged in the support unit, and a through hole is arranged on each of the two opposite sides of the support unit to communicate with the channel, and a positioning bead is arranged in each of the two through holes, and the support unit is arranged on one side above the channel. A notch is provided at the support unit, and an assembly portion is formed at the upper end of the support unit to be assembled with an armrest pad; a control unit includes a control rod, the control rod is inserted into the channel of the support unit, and a pit is provided on the left and right sides of the control rod, and a chamfer is formed at the upper edge of the pit. The two positioning beads are movably accommodated or disengaged in the two pits, so that the two positioning beads and the Any positioning pit provided on the two side walls of the cavity of the guide unit corresponds to the latch or separation, and a handle is fixedly provided on the upper end of the control rod at the middle position of the left and right sides of the control rod, and the handle is exposed to the outside through the notch provided by the support unit, and 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.

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

In the armrest lifting structure as described above, the guide 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 of the shells.

Thus, when the height of the armrest is adjusted and the control rod is pulled 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 guide unit cavity. 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 guide unit cavity, the two positioning beads can contact the cavity walls on both sides of the cavity respectively, so that the support unit will not deflect when moving, so as to improve the smoothness of the armrest lifting.

1: Handrail bracket

11: Hollow part

2: Guidance unit

21: Shell

22: Chamber

221: Positioning pit

23: Hole

24: Long slot hole

3: Support unit

31: Channel

32: Guide block

33:Through hole

34: Gap

35: Assembly Department

4: Control unit

41: Control rod

411: pits

412: Leading angle

413: Grip

42: Elastic parts

5: Positioning beads

6: Armrest pad

Figure 1: 3D exploded view of the present invention

Figure 2: Front cross-sectional view of the present invention

Figure 3: Side sectional view of the present invention

Figure 4: Usage status diagram of the present invention (I)

Figure 5: Usage status diagram of the present invention (II)

In order to make the technical means of the present invention and the effects that can be achieved more completely and clearly disclosed, the following is a detailed description, and please refer to the disclosed drawings and figure numbers: First, please refer to the first to third figures, which are the armrest lifting structure of the present invention, which mainly includes: an armrest bracket (1), the armrest bracket (1) can be connected to the seat, and a hollow part (11) is formed in the armrest bracket (1); a guide unit (2) is accommodated in the hollow part (11) of the armrest bracket (1), and the guide unit (2) is composed of two opposite shells (21) connected to form a cavity (22) between the two shells (21), and a set of holes (23) are provided on the upper end of one of the shells (21) to correspond to the cavity (22). The housing (21) is provided with a longitudinal long slot hole (24) on the end surface thereof, and the long slot hole (24) is communicated with the housing (22), and the housing (22) is provided with a plurality of positioning holes (221) arranged at intervals in the longitudinal direction on the two opposite side walls thereof; a supporting unit (3) is provided so that the supporting unit (3) is connected to the housing (2) of the guide unit (2) The sleeve hole (23) provided in the guide unit (21) is correspondingly accommodated in the cavity (22) of the guide unit (2), and 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 long slot hole (24) of the guide unit (2). ) are provided with a through hole (33) on two opposite sides, and the through hole (33) is communicated with the channel (31) of the support unit (3), and a positioning bead (5) is respectively provided in the two through holes (33), and the support unit (3) is provided with a notch (34) on one side above the channel (31), and an assembly portion (35) is formed at the upper end of the support unit (3) ), to be assembled with an armrest pad (6); a control unit (4), comprising a control rod (41), and the control rod (41) is inserted into the channel (31) of the support unit (3), and a recess (411) is respectively provided on the left and right opposite sides of the control rod (41), and a groove is formed at the upper edge of the recess (411) toward the recess (411). ) direction, the two positioning beads (5) are movably accommodated or separated in the two recesses (411) respectively, so that the two positioning beads (5) are correspondingly engaged or separated with any positioning pit (221) provided on the two side walls of the cavity (22) of the guide unit (2), and the upper end of the control rod (41) is located at the middle position of the left and right sides of the control rod, A handle (413) is fixedly provided by screw locking, and the handle (413) is exposed from the notch (34) provided in the support unit (3). At least one elastic member (42) is provided between the upper end of the control rod (41) and the lower 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).

According to this, when assembling, the control rod (41) of the control unit (4) is first inserted into the channel (31) of the support unit (3), and then the elastic member (42) of the control unit (4) is arranged between the upper end of the control rod (41) and the lower end of the armrest pad (6), and then the armrest pad (6) and the assembly part (35) provided at the upper end of the support unit (3) are connected. The supporting unit (3) is then placed in the receiving cavity (22) of the guiding unit (2) through the sleeve hole (23) provided at the upper end of one shell (21) of the guiding unit (2), and the guide block (32) provided at at least one end surface of the supporting unit (3) is correspondingly provided at the long slot hole (23) provided at at least one end surface of the shell (21) of the guiding unit (2). 4), the control rod (41) is pushed downward by the elastic member (42), so that the two positioning beads (5) are separated from the two side recesses (411) 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 two side through holes (33) of the support unit (3) are respectively locked and positioned with the positioning pits (221) provided on the two side cavity walls of the cavity (22) of the guide unit (2), and the previously assembled control unit (4), support unit (3) and guide unit (2) are accommodated in the hollow part (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 present invention.

Thus, when the user wants to adjust the height of the armrest, please refer to the fourth figure, which shows that the user holds the handle (413) of the control rod (41) and applies force 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) are respectively moved along the two recesses (411). ) slides into the two recesses (411) through the guide angles (412) provided on the upper edge of the guide unit (2). At this time, the two positioning beads (5) are released from the locking state of the positioning pits (221) provided on the two side walls of the cavity (22) of the guide unit (2) and retracted into the two side through holes (33) of the support unit (3). Then, the user holds the armrest pad (6) by hand to apply force to the armrest pad (6) assembled therewith. The supporting unit (3) is pulled up or pushed down to the desired height. When the supporting unit (3) moves up or down, the positioning beads (5) retracted into the through holes (33) on both sides of the supporting unit (3) are in point contact with the walls of the two sides of the cavity (22) of the guiding unit (2). Therefore, the supporting unit (3) will not deviate when moving up or down. The support unit (3) is inclined, and contacts and rubs against the wall of the cavity (22), so as to improve the smoothness of the lifting and adjusting of the armrest. In addition, when the user applies force to move the support unit (3) up and down through the armrest pad (6), the support unit (3) can be guided by the guide block (32) located in the long slot hole (24) on the end surface of the guide unit (2), so as to further improve the smoothness of the lifting and adjusting of the armrest.

Please refer to the fifth figure. 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) which is compressed due to 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) are guided by the guide angles (412) provided on the upper edges of the two side pits (411) of the control rod (41) and slide out of the two pits (411). Then, the control rod (41) is moved upward. (41) The two side rod walls push the two positioning beads (5) outwards, so that the two positioning beads (5) are re-positioned with the positioning holes (221) provided on the two side walls of the cavity (22) of the guide unit (2) to fix the adjusted height of the handrail. In this way, the two positioning beads (5) and the positioning holes (221) on the two sides of the cavity (22) of the guide unit (2) can not only increase the stability of the handrail when it is fixed, but also avoid the handrail from shaking improperly, so as to improve the comfort of the user's hand when it is placed on the handrail.

Here, the armrest lifting structure of the present invention only needs to pull the control rod (41) to adjust the armrest, which is very convenient to operate. In addition, the armrest lifting structure of the present invention 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, so as to meet the modern low-cost and high-productivity industry requirements. In addition, since the present invention has fewer parts, it is not easy to fall off or be damaged at the assembly point, so as to increase the service life of the chair and save maintenance costs.

The aforementioned embodiments or drawings do not limit the implementation of the present invention. Any appropriate changes or modifications made by a person with ordinary knowledge in the relevant technical field should be deemed to be within the patent scope of the present invention.

From the above structure and implementation method, it can be seen that the present invention has the following advantages:

1. The armrest lifting structure of the present invention only needs to pull the control lever to adjust the armrest, which is extremely convenient to operate.

2. The armrest lifting structure of the present invention 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. Thus, when the support unit moves up and down, it can prevent the support unit from being improperly deflected and rubbing against the cavity wall, so as to improve the smoothness of the armrest lifting adjustment.

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 time to meet the modern low-cost, high-productivity industry needs.

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.

In summary, the embodiments of the present invention can achieve the expected effects, and the specific structure disclosed is not only not seen in similar products, but also has not been disclosed before the application. It fully complies with the provisions and requirements of the Patent Law. Therefore, an application for invention patent is filed in accordance with the law. I sincerely request your review and grant of patent. I would really appreciate the convenience.

1: Handrail bracket

11: Hollow part

2: Guidance unit

21: Shell

22: Chamber

221: Positioning pit

23: Hole

24: Long slot hole

3: Support unit

32: Guide block

33:Through hole

34: Gap

35: Assembly Department

4: Control unit

41: Control rod

411: pits

413: Grip

42: Elastic parts

5: Positioning beads

6: Armrest pad

Claims (3)

A handrail lifting structure includes: A handrail bracket, wherein a hollow portion is formed in the handrail bracket; A guide unit is accommodated in the hollow portion 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 to communicate with the cavity, and a number of positioning pits are formed on the cavity walls on opposite sides of the cavity of the guide unit and arranged at intervals in the longitudinal direction; A support unit is provided so that the support unit is accommodated in the cavity of the guide unit corresponding to the sleeve hole at the upper end of the guide unit, and a longitudinal channel is provided in the support unit, and a through hole is provided on two opposite sides of the support unit to communicate with the channel, and a positioning bead is provided in each of the two through holes, and a notch is provided on one side above the channel of the support unit, and an assembly part is formed at the upper end of the support unit to be assembled with an armrest pad; A control unit includes a control rod, which is inserted into the channel of the support unit, and a pit is provided on the left and right sides of the control rod, and a chamfer is formed at the upper edge of the pit. The two positioning beads are movably accommodated or separated in the two pits, so that the two positioning beads are correspondingly locked or separated with any positioning pit provided on the two side walls of the cavity of the guide unit. In addition, a handle is fixedly provided at the upper end of the control rod at the middle position of the left and right sides of the control rod, and the handle is exposed from the notch provided by 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 against the control rod and the armrest pad for positioning. As described in claim 1, the guide unit is provided with a longitudinal long slot hole at at least one end surface thereof, and the long slot hole is communicated with its cavity. In addition, a guide block is provided at at least one end surface of the support unit, and the guide block is arranged correspondingly in the long slot hole of the guide unit. As described in claim 1, the armrest lifting structure, wherein the guide 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 of the shells.

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