TW202203816A - Lifting armrest capable of improving the durability of the product by alleviating the wear rate of the slide fastening part - Google Patents

Abstract

The present invention provides a lifting armrest, which comprises: a base; and a lifting set arranged on a support part and connected with a hand rest cushion at one end. The lifting set includes a casing, a lifting piece, a lifting switch and a plug. One end of the lifting switch away from the hand rest cushion has a guide part, and two sides of the guide part are each provided with a sliding groove. Each sliding groove has a straight groove section and an inclined groove section connected with each other. One end of the guide part away from the hand rest cushion has an inclined contact surface. The plug has an insertion part, and the insertion part has extension parts respectively extending toward the two sides of the guide part. Each extension part extends toward the inside of the corresponding sliding groove, and is provided with a slide fastening part in a sliding manner. When each slide fastening part is disposed in the corresponding straight groove section, the plug slides against a side contact surface. When each slide fastening part is disposed in the corresponding inclined groove section, the plug abuts on the inclined contact surface, so as to share the burden on the slide fastening part for alleviating the wear rate of the slide fastening part, thereby improving the durability of the product.

Description

Lifting handrail

The present invention relates to an armrest of a seat, which can be adjusted to a suitable height for the occupant by lifting and lowering.

Seats have been quite common since ancient times. Compared with the ground, they can make people more comfortable when they are in a sitting position. However, with the progress of science, people are gradually pursuing ergonomic design in the design of seats. , of which the armrest is a very important design, which is used to provide hand rest.

Nowadays, in order to be more ergonomic, the armrests used for seats generally have a height-adjustable function to adapt to passengers of different heights and provide a more comfortable riding experience. The more common lifting armrests in the world are As shown in the figures of Taiwan Patent Publication No. M438199 "Height Adjustment Structure of Chair Armrest", the guide groove on the handle drives the positioning member to slide and extend through the groove, so that the positioning member can be movably inserted into the corresponding positioning hole. , and achieve the function of height adjustment and positioning of the handrail, but this structure has defects in the movable structure of the positioning member, that is, only the guide block of the positioning member is guided by the guide groove to make the positioning member move (M438199 No. 4, 5), it is quite easy to cause the wear of the guide block, which will seriously affect the smoothness of the operating handle and the positioning stability of the positioning member under long-term use.

Based on the above content, it can be known that how to improve the problem of easy wear and tear of the guide block of the positioning member of the lifting armrest of the seat can be said to be an urgent problem that major related industries need to solve in order to improve the durability of the product.

In the lift switch of the present invention, in addition to the sliding groove guiding the sliding part to make the plug move and displace, it further uses the inclined contact surface and the side contact surface to guide the plug, so as to share the burden of the sliding part and slow down the sliding part. The wear rate of the product is increased, thereby improving the durability of the product.

In order to achieve the above purpose and effect, the present invention provides a lifting armrest, which includes: a base, which has a support part, one end of the support part is connected with a chair connecting part and the other end has an opening, the support part is formed with a sliding space, and the sliding space is communicated with the opening, and one side of the support part is provided with a plurality of positioning holes that communicate with the sliding space; a lifting group is arranged on the support part and one end is connected with a hand cushion, and the lifting group includes a shell , a lifter, a lifter switch and a plug, the shell is slidably sleeved on the outside of the support portion, the lifter part is slidably inserted in the sliding space, the lifter part is exposed from the opening and is connected with the The shell is connected, and the lifting member has a moving space inside. A sliding hole is opened on one side of the lifting member to communicate with the moving space. The sliding hole can correspond to any positioning hole among the plurality of positioning holes. The lifting switch is arranged in the In the moving space, one end of the lift switch facing the handrest cushion has a pressing portion, and the pressing portion is exposed to the outside of the housing by the lifter and the shell, and the end of the lift switch away from the handrest cushion has a guide portion, The two sides of the guide portion are respectively provided with a sliding groove. Each sliding groove has a connected straight groove section and an inclined groove section. one end of the guide portion away from the handrest cushion has an inclined abutting surface, the inclined direction of the inclined abutting surface is the same as that of the inclined groove segment, and the side of the guiding portion has a side abutting surface connected to the inclined abutting surface, The plug has an insertion portion, the insertion portion is movably inserted into the sliding hole, the insertion portion extends toward the two sides of the guide portion with an extension portion respectively, and each extension portion extends toward the corresponding sliding groove and slides with an extension portion. A sliding button part, the insertion part and each extension part and the sliding button part surround a buckle space, and the part of the insertion part facing the buckle space has a connected slanting surface and a side bearing surface, which can be pressed by applying force When the lift switch is operated from the outside, each sliding part can slide on the corresponding sliding groove, so that the inserting part can be displaced in the sliding hole. When each sliding part is located in the corresponding straight groove section, the side contact surface slides against the side contact surface. When each sliding part is located in the corresponding inclined groove section, the inclined abutting surface can abut against the inclined abutting surface.

For a more detailed understanding of the embodiments of the present invention, please refer to the drawings. As shown in the first to sixth drawings, a lifting handrail includes: a base 1, which has a support portion 12, the support portion One end of 12 is connected with a chair connecting portion 13 and the other end has an opening 14. The support portion 12 forms a sliding space 15 on the inner side, and the sliding space 15 communicates with the opening 14. A plurality of positioning holes 16 in the space 15; a lift group 2, which is arranged on the support portion 12 and connected to a hand cushion 5 at one end, the lift group 2 includes a shell 21, a lift member 211, a lift switch 22 and a plug 3. The casing 21 is slidably sleeved on the outside of the support portion 12 , and 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 with the casing 21 . The lifting member 211 has a moving space 212 inside, and a sliding hole 213 connected to the moving space 212 is defined on one side of the lifting member 211. The sliding hole 213 can correspond to any positioning hole 16 in the plurality of positioning holes 16. The switch 22 is arranged in the moving space 212 , and the lift switch 22 has a pressing portion 221 at one end facing the handrest pad 5 . One end of the switch 22 away from the hand rest pad 5 has a guide portion 222, and two sides of the guide portion 222 are respectively provided with a sliding groove 223. The groove segment 225 is inclined from the end of the guide portion 222 to the direction of the hand rest pad 5 and is connected to the straight groove segment 224 . The end of the guide portion 222 away from the hand rest pad 5 has an inclined abutting surface 226 . The inclination direction of 226 is the same as that of the inclined groove section 225. The side of the guide portion 222 has an abutment surface 227 connected to the inclined abutment surface 226. The plug 3 has an insertion portion 31, and the insertion portion 31 is movable. Inserted into the sliding hole 213 , the insertion portion 31 extends toward the two sides of the guide portion 222 with an extension portion 32 respectively. 31, each extension portion 32 and each sliding button portion 33 surround a buckle space 335 (the fourth figure B), and the part of the insertion portion 31 facing the buckle space 335 has a connected inclined abutment surface 311 and a side abutment surface. 312. When the lift switch 22 is operated by applying force to the pressing portion 221, each sliding button portion 33 can be displaced in the corresponding sliding groove 223, so that the inserting portion 31 can be displaced in the sliding hole 213, and each sliding button portion 33 is located in the corresponding sliding groove 223. When the straight groove section 224 is located, the side contact surface 312 slides against the side contact surface 227, and the insertion portion 31 is inserted into the corresponding positioning hole 16. The abutting surface 311 can abut against the inclined abutting surface 226 , and the insertion portion 31 is displaced inward.

The seat connecting portion 13 is used for connecting with the seat.

Continuing the above content, the embodiment of the present invention will be further described in detail. As shown in the third figure, this is the state when the lift switch 22 has not been operated, and the plug 3 is inserted into the sliding hole 213 and the corresponding positioning hole 16, and as shown in the third A 3. As shown in Figure 3B, except that the sliding part 33 is located in the straight groove section 224, the insert part 31 also slides against the side abutting surface 227 with the side abutting surface 312, so as to increase the stability of the plug 3, and continue to apply force to operate up and down The switch 22 will be shown in the fourth, fourth, A, and fourth diagrams. As the lift switch 22 is displaced in the direction of the hand rest pad 5, the sliding part 33 slides away from the straight groove section 224 and enters the inclined groove section 225. The inclined contact surface 311 of the portion 31 slides against the inclined contact surface 226, and is guided by the inclined groove section 225 and the inclined contact surface 226 to retract the plug 3, and the insertion portion 31 moves out of the original positioning hole 16. At this time The lift group 2 can be displaced relative to the base 1 as shown in the fifth figure, and the lift switch 22 is reset by the continuous operation. At this time, the plug 3 is guided by the inclined groove section 225 and the inclined abutting surface 226 to the corresponding position. The hole 16 protrudes, and the sliding part 33 enters the straight groove 224 through the inclined groove section 225, and the structure of the straight groove 224 enables the sliding part 33 to slide into the inclined groove 225 before the plug 3 starts to move inward , to prevent the lifter group 2 from dropping suddenly due to the weight of the arm when the passenger touches the lift switch 22 by mistake.

Based on the above content, it can be known that the lift switch 22 of the present invention is further guided by the inclined contact surface 226 and the side contact surface 227, in addition to the sliding groove guiding the sliding part 33 to make the plug 3 move and displace, so as to guide the plug 3. In order to share the burden of the slider part 33 and slow down the wear speed of the slider part 33, the purpose of improving the conventional problems and improving the durability of the product is achieved.

As shown in the third A to the fourth B, the inclined groove sections 225 of the sliding grooves 223 each have a first inclined groove surface 2251 and a second inclined groove surface 2252 corresponding to each other, wherein the sliding grooves 223 Each of the straight groove sections 224 has a first straight groove surface 2241 and a second straight groove surface 2242 corresponding to each other. 33 has a flat side surface 333 and a guide side surface 334 that are connected between the corresponding first inclined surface 331 and the second inclined surface 332 and are far away from each other. When the portion 33 is located in the corresponding straight groove section 224, the flat side surface 333 of each sliding button portion 33 slides against the corresponding first straight groove surface 2241, and the leading side surface 334 of each sliding button portion 33 faces the corresponding second straight groove portion 33. On the groove surface 2242, when each sliding button portion 33 is located in the corresponding inclined groove section 225, the first inclined surface 331 and the second inclined surface 332 of each sliding button portion 33 slide against the corresponding first inclined groove surface 2251 and the second inclined groove respectively. Surface 2252, the guide side surface 334 is curved outwardly arched. Since there is a curve between the straight groove section 224 and the inclined groove section 225, the curved structure of the guide side surface 334 is beneficial to the sliding part. 33 is curved to increase the smoothness of sliding of the sliding buckle portion 33 between the inclined groove section 225 and the straight groove section 224 .

As shown in Figures 2 to 7, the plurality of positioning holes 16 are respectively connected with at least one guide groove hole 17, and some of the guide groove holes 17 in each guide groove hole 17 are connected between adjacent positioning holes 16. A guide protrusion 214 is protruded toward the support portion 12 on the outer side of the member 211 and at a position corresponding to the edge of the sliding hole 213 . Hole 17, this structure can reduce the situation that the sliding hole 213 cannot be aligned with the positioning hole 16, so as to reduce the situation that the plug 3 cannot be inserted into the positioning hole 16 due to excessive deviation between the sliding hole 213 and the positioning hole 16.

As shown in FIGS. 2 to 6 , a part of the lift switch 22 located in the moving space 212 defines a mounting hole 228 , and a first resilient portion 2281 is formed in the mounting hole 228 , and the lift 211 faces toward A second resilient portion 215 extends inside the fitting hole 228, and another elastic member 4 resiliently abuts between the first resilient portion 2281 and the second resilient portion 215. When the resilient member 4 compresses and returns, the The telescopic direction is the same as the direction in which the lift switch 22 can move. This structure provides a means for the lift switch 22 to reset, and this structure enables the elastic member 4 to operate more stably, and is surrounded by the lift member 211. The elastic member 4 It is less likely to pop out the placement hole 228 .

1: Base 12: Support part 13: Chair link 14: Opening 15: Sliding space 16: Positioning hole 17: Guide hole 2: Lifting group 21: Shell 211: Lifting parts 212: Mobile Space 213: Sliding hole 214: Guide convex part 215: The second spring 22: Lift switch 221: Pressing part 222: Guiding Department 223: Slip 224: Straight groove section 2241: The first straight groove 2242: Second straight groove surface 225: Inclined groove section 2251: The first inclined groove surface 2252: Second inclined groove surface 226: Oblique contact surface 227: Side contact surface 228: Placement hole 2281: The First Reach 3: plug 31: Insert 311: Reclining surface 312: side face 32: Extensions 33: Slider part 331: First Bevel 332: Second Bevel 333: Flat side 334: Guide side 335: Deduction space 4: elastic parts 5: hand cushion

The first picture is a three-dimensional schematic diagram of the creation. The second picture is a schematic diagram of the decomposition of this creation. The third figure is a schematic cross-sectional view of the line segment III-III of the first figure. The third diagram A is a schematic cross-sectional view of the line segment III-III of the first diagram. Figure 3 B is a partially enlarged schematic diagram of Figure 3 A. The fourth picture is a schematic diagram of the lift switch rising. Figure 4A Figure 3A Figure 3A is a schematic diagram of the lift switch rising. FIG. 4 B is a partial enlarged schematic diagram of FIG. 4 A. FIG. The fifth picture is a schematic diagram of adjusting the height of the lifting group. The sixth picture is a schematic diagram of the lift switch descending. The seventh figure is a schematic cross-sectional view of the line segment VII-VII of the first figure.

1: Base

13: Chair link

2: Lifting group

21: Shell

5: hand cushion

Claims (4)

A lifting handrail, comprising: A base has a support part, one end of the support part is connected with a chair connecting part and the other end has an opening, the support part forms a sliding space on the inner side, and the sliding space is communicated with the opening, one side of the support part has an opening. is provided with a plurality of positioning holes communicating with the sliding space; and a lift group, which is arranged on the support part and connected with a hand cushion at one end, the lift group includes a shell, a lift piece, a lift switch and a plug, the shell can be slidably sleeved on the outside of the support part, The lifter part is slidably inserted into the sliding space, the lifter part is exposed from the opening and connected to the housing, the lifter has a moving space inside, and a side of the lifter is opened with a connection to the moving space A sliding hole, the sliding hole can correspond to any positioning hole in the plurality of positioning holes, the lifting switch is arranged in the moving space, and the end of the lifting switch facing the hand cushion has a pressing part, and the pressing part is formed by the lifting member, The casing is exposed to the outside of the casing. One end of the lift switch away from the handrest cushion has a guide portion. Two sides of the guide portion are provided with a sliding groove. Each sliding groove has a connected straight groove section and an inclined groove section. , each inclined groove segment is inclined from the end of the guide portion to the direction of the hand rest cushion and is connected to the straight groove segment, the end of the guide portion away from the hand rest cushion has an inclined abutting surface, and the inclined direction of the inclined abutting surface is the same as that of the hand rest. The oblique groove segments are the same, the side of the guide portion has a side abutting surface connected to the oblique abutting surface, the plug has an inserting portion, the inserting portion is movably inserted into the sliding hole, and the inserting portion faces the sliding hole. An extension portion is respectively extended on two sides of the guide portion. Each extension portion extends toward the corresponding sliding groove and is slidably provided with a sliding button portion. The insertion portion, each extension portion and the sliding button portion surround a buckle space, and the insertion portion faces the sliding button. The part of the buckling space has a connected sloping surface and one side resting surface. When the lift switch is operated by applying force to the pressing part, each sliding part can slide in the corresponding sliding groove, so that the insertion part can slide in the sliding groove. When each sliding part is located in the corresponding straight groove section, the side contact surface slides against the side contact surface, and the insertion part is inserted into the corresponding positioning hole, when each sliding button part is located in the corresponding inclined groove section, The inclined abutting surface is abutted against the inclined abutting surface, and the insertion portion is displaced inward. The lifting handrail as claimed in claim 1, wherein the inclined groove sections of each slide groove each have a first inclined groove surface and a second inclined groove surface corresponding to each other, wherein the straight groove sections of each slide groove each have a mutually corresponding a first straight groove surface, a second straight groove surface, each sliding button portion has a first inclined surface and a second inclined surface away from each other, and each sliding button portion has a connection between the corresponding first inclined surface and the second inclined surface and A flat side and a guide side that are far away from each other, the guide side is closer to the hand rest pad than the flat side, and when each sliding button portion is located in the corresponding straight groove section, the flat side of each sliding button portion respectively slides against the corresponding The first straight groove surface, and the guide side surface of each sliding button portion faces the corresponding second straight groove surface. When each sliding button portion is located in the corresponding inclined groove section, the first inclined surface and the second inclined surface of each sliding button portion slide respectively. Abutting against the corresponding first inclined groove surface and the second inclined groove surface, the guiding surface is in the shape of an arc curved outward. The lifting handrail according to claim 1, wherein the plurality of positioning holes are respectively connected with at least one guide groove hole, and part of the guide groove holes in each guide groove hole is connected between adjacent positioning holes, and the outer side of the lifting member corresponds to the A guide protruding portion is protruded toward the support portion at the position of the edge of the sliding hole, and the guide protruding portion can slide through the corresponding guide groove hole when the lifting member is extended and retracted relative to the support portion. The lifting armrest as claimed in claim 1, wherein a part of the lifting switch located in the moving space is provided with a mounting hole, the mounting hole is provided with a first resilient part, and the lifting element extends toward the interior of the mounting hole with a In the second spring abutting part, another elastic piece is springing between the first spring abutting part and the second spring abutting part, and the expansion and contraction direction of the elastic piece during compression and return is the same as the moving direction of the lift switch.

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