CN113966931A

CN113966931A - Lifting armrest

Info

Publication number: CN113966931A
Application number: CN202010716210.6A
Authority: CN
Inventors: 谢文平
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-07-23
Filing date: 2020-07-23
Publication date: 2022-01-25
Anticipated expiration: 2040-07-23
Also published as: CN113966931B

Abstract

The invention is a lifting handrail, which comprises: a base; the lifting group is arranged on the supporting part, one end of the lifting group is connected with the hand cushion, the lifting group comprises a shell, a lifting piece, a lifting switch and a plug, one end of the lifting switch, which is far away from the hand cushion, is provided with a guide part, two sides of the guide part are respectively provided with a sliding groove, each sliding groove is provided with a straight groove section and an inclined groove section which are connected, one end of the guide part, which is far away from the hand cushion, is provided with an inclined abutting surface, the plug is provided with an inserting part, the inserting part respectively extends towards two sides of the guide part and is provided with an extending part, each extending part extends towards the corresponding sliding groove and is provided with a sliding buckle part in a sliding way, when each sliding buckle part is positioned at the corresponding straight groove section, the plug slides against the inclined abutting surface, and when each sliding buckle part is positioned at the corresponding inclined groove section, the plug abuts against the inclined abutting surface to bear the burden of the sliding buckle part, so that the abrasion speed of the sliding buckle part is reduced, and the product durability is further improved.

Description

Lifting armrest

Technical Field

The invention relates to an armrest of a chair, which can be adjusted to the proper height of a passenger by lifting.

Background

The seat is a common sitting tool from old to present, and can make people more comfortable when sitting compared with the ground, however, with the scientific progress, people gradually pursue the ergonomic design on the seat design, wherein the armrest is a very important design for providing two hands to place.

Nowadays, in order to better conform to the human engineering, the armrests used for the chair generally have the function of adjusting the height so as to adapt to passengers with different heights and provide more comfortable riding experience, the conventional lifting armrest is shown in Taiwan patent publication No. M438199, the height adjustment structure of chair armrest, and the guide slot on the pull handle drives the positioning member to slide and extend in the through slot, however, the movable structure of the positioning member has a defect that the positioning member is moved only by guiding the guide block of the positioning member with the guide slot (as shown in fig. 4 and 5 of the M438199), which is quite easy to cause abrasion of the guide block, and thus the operating smoothness of the operating handle and the positioning stability of the positioning member are seriously affected after long-term use.

From the above, it can be known how to improve the problem that the guide block of the conventional lifting handrail positioning element is easy to wear, which can be said to be a problem that most of the related manufacturers need to solve urgently to improve the durability of the product.

Disclosure of Invention

The main technical problem to be solved by the present invention is to provide a lifting handrail, which overcomes the above-mentioned defects in the prior art, and the lifting switch of the present invention uses a sliding groove to guide a sliding fastening portion to make a plug move, and further uses an inclined abutting surface and a side abutting surface to guide the plug to share the burden of the sliding fastening portion, so as to slow down the wear speed of the sliding fastening portion, and further improve the durability of the product.

The technical scheme adopted by the invention for solving the technical problems is as follows:

a lifting handrail, comprising: a base with a supporting part, one end of the supporting part is connected with a chair connecting part and the other end is provided with an opening, the supporting part forms a sliding space on the inner side, the sliding space is communicated with the opening, and one side of the supporting part is provided with a plurality of positioning holes communicated with the sliding space; a lifting group, which is arranged on the supporting part and one end of which is connected with a hand cushion, the lifting group comprises a shell, a lifting part, a lifting switch and a plug, the shell is slidably sleeved outside the supporting part, the lifting part is slidably inserted in the sliding space, the lifting part is exposed out of the opening and is connected with the shell, a moving space is arranged inside the lifting part, one side of the lifting part is provided with a sliding hole communicated with the moving space, the sliding hole can correspond to any one of the positioning holes, the lifting switch is arranged in the moving space, one end of the lifting switch facing the hand cushion is provided with a pressing part, the pressing part is exposed out of the shell by the lifting part and the shell, one end of the lifting switch far away from the hand cushion is provided with a guiding part, two sides of the guiding part are respectively provided with a sliding groove, and each sliding groove is provided with a straight groove section connected with the sliding groove, An inclined groove section, each inclined groove section is inclined from the tail end of the guiding part to the direction of the hand cushion and connected with the straight groove section, one end of the guiding part far away from the hand cushion is provided with an inclined abutting surface, the inclined direction of the inclined abutting surface is the same as that of the inclined groove section, the side edge of the guiding part is provided with a side abutting surface connected with the inclined abutting surface, the plug bolt is provided with an inserting part movably inserted in the sliding hole, the inserting part respectively extends towards two sides of the guiding part and is provided with an extending part, each extending part extends towards the corresponding sliding groove and is provided with a sliding buckle part in a sliding way, a buckling space is surrounded by the inserting part, each extending part and the sliding buckle part, the inserting part is provided with an inclined abutting surface and a side abutting surface which are connected, when the lifting switch is operated by applying force on the pressing part, each sliding buckle part can slide in the corresponding sliding groove, so that the inserting part can move in the sliding hole, each sliding buckle part is positioned in the corresponding straight groove section, the side leaning surface slides against the side leaning surface, and when each slide fastener part is positioned at the corresponding inclined groove section, the inclined leaning surface can lean against the inclined leaning surface.

Further wherein the inclined groove sections of the sliding grooves are respectively provided with a first inclined groove surface and a second inclined groove surface which are mutually corresponding, wherein the straight groove section of each sliding groove is provided with a first straight groove surface and a second straight groove surface which are mutually corresponding, each sliding buckle part is provided with a first inclined surface and a second inclined surface which are mutually far away, each sliding buckle part is provided with a flat side surface and a guide side surface which are mutually far away and are connected between the corresponding first inclined surface and the corresponding second inclined surface, the guide side surface is closer to the hand back cushion than the flat side surface, when each slide fastener part is positioned at the corresponding straight groove section, the flat side surface of each slide fastener part slides and abuts against the corresponding first straight groove surface, the guide side surface of each slide fastener part faces to the corresponding second straight groove surface, when each slide fastener part is positioned at the corresponding inclined groove section, the first inclined surface and the second inclined surface of each sliding buckle part respectively slide against the corresponding first inclined groove surface and the second inclined groove surface, and the guide side surface is in an outward arched arc shape.

And the plurality of positioning holes are respectively communicated with at least one guide groove hole, part of the guide groove holes in each guide groove hole are communicated between the adjacent positioning holes, a guide convex part is convexly arranged on the outer side of the lifting piece and corresponding to the opening edge of the sliding hole towards the supporting part, and when the lifting piece stretches relative to the supporting part, the guide convex part can slide through the corresponding guide groove hole.

And a part of the lifting switch, which is positioned in the moving space, is provided with a piece placing hole, the piece placing hole is internally provided with a first elastic abutting part, the lifting piece extends towards the inner part of the piece placing hole to form a second elastic abutting part, an elastic piece is abutted between the first elastic abutting part and the second elastic abutting part, and the expansion direction of the elastic piece during compression and resetting is the same as the movable direction of the lifting switch.

The lifting switch has the advantages that the sliding groove guides the sliding buckling part to enable the plug to move movably, and the inclined abutting surface and the side abutting surface further guide the plug to share the burden of the sliding buckling part, so that the abrasion speed of the sliding buckling part is reduced, and the durability of a product is improved.

Drawings

The invention is further illustrated with reference to the following figures and examples.

Fig. 1 is a perspective view of the present invention.

FIG. 2 is an exploded view of the present invention.

Fig. 2A is an exploded view of the lifter switch and the plug.

FIG. 2B is an exploded view of the lifter switch and plug from another perspective.

Fig. 3 is a partial cross-sectional view of line III-III of fig. 1.

Fig. 3A is a schematic cross-sectional view of line III-III of fig. 1.

Fig. 3B is a partially enlarged view of fig. 3A.

Fig. 4 is a schematic view of the lifting switch being raised.

Fig. 4A is a schematic diagram of the lifting switch shown in fig. 3A being lifted.

Fig. 4B is a partially enlarged schematic view of fig. 4A.

Fig. 5 is a schematic diagram of adjusting the height of the lifting group.

Fig. 6 is a schematic view of the lowering of the lift switch.

Fig. 7 is a schematic cross-sectional view taken along line VII-VII shown in fig. 1.

The reference numbers in the figures illustrate:

1 base

12 support part

13 chair connecting part

14 opening

15 sliding space

16 positioning hole

17 guide channel hole

2 lifting group

21 outer cover

211 lifting piece

212 space of movement

213 slide hole

214 guide projection

215 second abutting portion

22 lifting switch

221 pressing part

222 guiding part

223 sliding groove

224 straight channel section

2241 first groove surface

2242 second straight ditch surface

225 oblique ditch section

2251 first inclined groove surface

2252 second inclined groove surface

226 inclined butting face

227 side abutting surface

228 workpiece placing hole

2281A first elastic part

3 plug

31 insert part

311 inclined leaning surface

312 side leaning surface

32 extension part

33 sliding fastener part

331 first inclined plane

332 second inclined plane

333 flat side

334 leading side surface

335 fastening space

4 elastic member

5 hand cushion

Detailed Description

To further explain the embodiments of the present invention in detail, please also refer to the attached drawings, as shown in fig. 1 to 6, a lifting handrail comprises: a base 1 having a supporting portion 12, one end of the supporting portion 12 is connected to a chair connecting portion 13 and the other end has an opening 14, the supporting portion 12 has a sliding space 15 formed inside, the sliding space 15 is communicated with the opening 14, one side of the supporting portion 12 is provided with a plurality of positioning holes 16 communicated with the sliding space 15; a lifting group 2, which is disposed on the supporting portion 12 and one end of which is connected to a hand cushion 5, the lifting group 2 includes a housing 21, a lifting member 211, a lifting switch 22 and a plug 3, the housing 21 is slidably sleeved outside the supporting portion 12, the lifting member 211 is partially slidably inserted into the sliding space 15, the lifting member 211 is partially exposed from the opening 14 and connected to the housing 21, the lifting member 211 has a moving space 212 therein, one side of the lifting member 211 is provided with a sliding hole 213 connected to the moving space 212, the sliding hole 213 is corresponding to any one of the positioning holes 16, the lifting switch 22 is disposed in the moving space 212, one end of the lifting switch 22 facing the hand cushion 5 has a pressing portion 221, the pressing portion 221 is exposed from the lifting member 211 and the housing 21 outside the housing 21, one end of the lifting switch 22 far from the hand cushion 5 has a guiding portion 222, two sides of the guiding portion 222 are respectively provided with a sliding groove 223, each sliding groove 223 has a straight groove section 224 and an inclined groove section 225 connected with each other, each inclined groove section 225 is inclined from the end of the guiding portion 222 to the direction of the hand cushion 5 and is connected with the straight groove section 224, one end of the guiding portion 222 away from the hand cushion 5 has an inclined abutting surface 226, the inclined direction of the inclined abutting surface 226 is the same as that of the inclined groove section 225, the side of the guiding portion 222 has a side abutting surface 227 connected with the inclined abutting surface 226, the plug 3 has an inserting portion 31, the inserting portion 31 is movably inserted into the sliding hole 213, the inserting portion 31 respectively extends to two sides of the guiding portion 222 with an extending portion 32, each extending portion 32 extends to the corresponding sliding groove 223 and is slidably provided with a sliding fastening portion 33, a fastening space 311 (fig. 4B) is surrounded by the inserting portion 31, each extending portion 32 and each sliding fastening portion 33, and a part of the inserting portion 31 facing the fastening space 335 has an inclined surface 311 connected with each extending portion, A side leaning surface 312, when the lifting switch 22 is operated by applying force to the pressing portion 221, each sliding-buckling portion 33 is displaced in the corresponding sliding groove 223, so that the insertion portion 31 is displaced in the sliding hole 213, when each sliding-buckling portion 33 is located in the corresponding straight groove section 224, the side leaning surface 312 slides against the side leaning surface 227, the insertion portion 31 is inserted in the corresponding positioning hole 16, when each sliding-buckling portion 33 is located in the corresponding inclined groove section 225, the inclined leaning surface 311 leans against the inclined leaning surface 226, and the insertion portion 31 is displaced inwards.

The seat connecting portion 13 is used to connect with a seat.

In the following description, referring to fig. 3, which shows the state before the lifting switch 22 is operated, the plug 3 is inserted into the sliding hole 213 and the corresponding positioning hole 16, and as shown in fig. 3A and 3B, except that the sliding-buckling portion 33 is located at the straight groove section 224, the insertion portion 31 slides against the side abutting surface 227 by the side abutting surface 312, so as to increase the stability of the plug 3, the lifting switch 22 is operated by applying a force, as shown in fig. 4, 4A and 4B, because the lifting switch 22 is displaced toward the hand-rest pad 5, the sliding-buckling portion 33 slides away from the straight groove section 224 and enters the inclined groove section 225, and the insertion portion 31 slides against the inclined abutting surface 226, and retracts the plug 3 by the guidance of the inclined groove section 225 and the inclined abutting surface 226, the insertion portion 31 moves out of the positioning hole 16, at this time, the lifting set 2 can be displaced relative to the base 1 as shown in fig. 5, and the lifting switch 22 is operated to reset, at this time, the plug 3 is guided by the inclined groove section 225 and the inclined abutting surface 226 to extend toward the corresponding positioning hole 16, and the sliding-buckling portion 33 enters the straight groove section 224 through the inclined groove section 225, and the structure of the straight groove section 224 enables the sliding-buckling portion 33 to slide into the inclined groove section 225, so that the plug 3 starts to move inward, and the situation that the lifting group 2 suddenly descends due to the weight of the arm when the rider slightly touches the lifting switch 22 in the arm placing process is avoided.

From the above, it can be seen that the lifting switch 22 of the present invention uses the sliding groove to guide the sliding-fastening portion 33 to movably displace the plug 3, and further uses the inclined abutting surface 226 and the side abutting surface 227 to guide the plug 3, so as to share the burden of the sliding-fastening portion 33 and reduce the wear rate of the sliding-fastening portion 33, thereby achieving the purpose of improving the existing problems and increasing the durability of the product.

As shown in fig. 3A to 4B, each of the inclined groove sections 225 of each of the sliding grooves 223 has a first inclined groove surface 2251 and a second inclined groove surface 2252 corresponding to each other, each of the straight groove sections 224 of each of the sliding grooves 223 has a first straight groove surface 2241 and a second straight groove surface 2242 corresponding to each other, each of the sliding buckle parts 33 has a first inclined surface 331 and a second inclined surface 332 facing away from each other, each of the sliding buckle parts 33 has a flat side surface 333 connected between the corresponding first inclined surface 331 and the corresponding second inclined surface 332 and facing away from each other, a guide side surface 334, the guide side surface 334 is closer to the hand rest 5 than the flat side surface 333, when each of the sliding buckle parts 33 is located at the corresponding straight groove section 224, the flat side surface 333 of each of the sliding buckle part 33 slides against the corresponding first straight groove surface 2241, and the guide side surface 334 of each of the sliding buckle part 33 faces the corresponding second straight groove surface 2242, when each of the sliding buckle part 33 is located at the corresponding inclined groove section 225, each of the first inclined groove section 33, The second inclined surface 332 slides against the corresponding first inclined groove surface 2251 and second inclined groove surface 2252, and the guiding side surface 334 is curved outward, and since there is a curve between the straight groove section 224 and the inclined groove section 225, the curved guiding side surface 334 is beneficial for the sliding buckle section 33 to curve over, so as to increase the smoothness of the sliding buckle section 33 sliding between the inclined groove section 225 and the straight groove section 224.

As shown in fig. 2 to 7, the plurality of positioning holes 16 are respectively connected to at least one guiding hole 17, a part of the guiding hole 17 in each guiding hole 17 is connected between adjacent positioning holes 16, a guiding protrusion 214 is protruded from the outer side of the lifting member 211 and the position corresponding to the edge of the sliding hole 213 toward the supporting portion 12, when the lifting member extends and contracts relative to the supporting portion 12, the guiding protrusion 214 can slide through the corresponding guiding hole 17, so as to reduce the situation that the sliding hole 213 cannot be aligned with the positioning hole 16, and to reduce the situation that the plug 3 cannot be inserted into the positioning hole 16 due to the excessive deviation between the sliding hole 213 and the positioning hole 16.

As shown in fig. 2 to 6, a device placing hole 228 is formed in a portion of the lifting switch 22 located in the moving space 212, a first abutting portion 2281 is disposed in the device placing hole 228, a second abutting portion 215 extends from the lifting switch 211 toward the device placing hole 228, an elastic member 4 abuts between the first abutting portion 2281 and the second abutting portion 215, and a stretching direction of the elastic member 4 during compression and return is the same as a moving direction of the lifting switch 22, so as to provide a means for resetting the lifting switch 22, and the elastic member 4 can be more stably operated and is less likely to be ejected out of the device placing hole 228 by the elastic member 4 surrounded by the lifting switch 211.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and all simple modifications, equivalent variations and modifications made to the above embodiment according to the technical spirit of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A lifting handrail, comprising:

a base with a supporting part, one end of the supporting part is connected with a chair connecting part and the other end is provided with an opening, the supporting part forms a sliding space on the inner side, the sliding space is communicated with the opening, and one side of the supporting part is provided with a plurality of positioning holes communicated with the sliding space;

and a lifting group which is arranged on the supporting part and one end of which is connected with a hand cushion, the lifting group comprises a shell, a lifting part, a lifting switch and a plug bolt, the shell is slidably sleeved outside the supporting part, the part of the lifting part is slidably inserted in the sliding space, the part of the lifting part is exposed out of the opening and is connected with the shell, a moving space is arranged inside the lifting part, one side of the lifting part is provided with a sliding hole communicated with the moving space, the sliding hole can correspond to any one of the positioning holes, the lifting switch is arranged in the moving space, one end of the lifting switch facing the hand cushion is provided with a pressing part, the pressing part is formed by the lifting part and the shell and is exposed outside the shell, one end of the lifting switch far away from the hand cushion is provided with a guide part, two sides of the guide part are respectively provided with a sliding groove, and each sliding groove is provided with a straight groove section connected with each other, An inclined groove section, each inclined groove section is inclined from the tail end of the guiding part to the direction of the hand cushion and connected with the straight groove section, one end of the guiding part far away from the hand cushion is provided with an inclined abutting surface, the inclined direction of the inclined abutting surface is the same as that of the inclined groove section, the side edge of the guiding part is provided with a side abutting surface connected with the inclined abutting surface, the plug bolt is provided with an inserting part movably inserted in the sliding hole, the inserting part respectively extends towards two sides of the guiding part and is provided with an extending part, each extending part extends towards the corresponding sliding groove and is provided with a sliding buckle part in a sliding way, a buckling space is surrounded by the inserting part, each extending part and the sliding buckle part, the inserting part is provided with an inclined abutting surface and a side abutting surface which are connected, when the lifting switch is operated by applying force on the pressing part, each sliding buckle part can slide in the corresponding sliding groove, so that the inserting part can move in the sliding hole, each sliding buckle part is positioned in the corresponding straight groove section, the side leaning surface slides against the side leaning surface, the inserting portion is inserted into the corresponding positioning hole, when each sliding buckle portion is located at the corresponding inclined groove section, the inclined leaning surface can lean against the inclined leaning surface, and the inserting portion moves inwards.

2. The lift handrail of claim 1, wherein the inclined groove sections of the sliding grooves each have a first inclined groove surface and a second inclined groove surface corresponding to each other, wherein the straight groove sections of the sliding grooves each have a first straight groove surface and a second straight groove surface corresponding to each other, each sliding buckle portion has a first inclined surface and a second inclined surface away from each other, each sliding buckle portion has a flat side surface and a guide side surface connected between the corresponding first inclined surface and the second inclined surface and away from each other, the guide side surface is closer to the hand rest pad than the flat side surface, when each sliding buckle portion is located at the corresponding straight groove section, the flat side surface of each sliding buckle portion slides against the corresponding first straight groove surface, and the guide side surface of each sliding buckle portion faces the corresponding second straight groove surface, when each sliding buckle portion is located at the corresponding inclined groove section, the first inclined surface and the second inclined surface of each sliding buckle portion slide against the corresponding first inclined groove surface, respectively, The second inclined groove surface, the leading side surface is in an arc shape which is arched outwards.

3. The lift arm according to claim 1, wherein the positioning holes are respectively connected to at least one guiding hole, a portion of the guiding hole in each guiding hole is connected between adjacent positioning holes, a guiding protrusion is protruded from the outer side of the lift member and corresponding to the opening edge of the sliding hole toward the supporting portion, and the guiding protrusion slides through the corresponding guiding hole when the lift member extends and retracts relative to the supporting portion.

4. The armrest as claimed in claim 1, wherein a part of the lifting switch located in the moving space is formed with a hole, the hole is formed with a first elastic portion, the lifting member extends to a second elastic portion inside the hole, and an elastic member is elastically abutted between the first elastic portion and the second elastic portion, and the elastic member is compressed and restored in the same direction as the moving direction of the lifting switch.