Wheelchair armrest mechanism with adjustable height and angle

Abstract

The invention relates to the technical field of wheelchair armrests, and discloses a height and angle adjustable wheelchair armrest mechanism which comprises a mounting plate, a side supporting mechanism, a lifting mechanism, a connecting mechanism, a supporting mechanism and an auxiliary adjusting mechanism. The connecting mechanism is arranged, and the rotating axis of the rotating part at the top of the first mounting plate is perpendicular to the rotating axis of the rotating part at the bottom of the second mounting plate, so that when the second mounting plate is pushed back and forth, the rotating part at the top of the first mounting plate can rotate, and the second mounting plate can move back and forth; the rotating piece at the bottom of the second mounting plate can rotate, so that the second mounting plate moves laterally, the distance between the second mounting plate and the first mounting plate can be adjusted in a small range by arranging the mounting rod and the movable rod, a certain height adjusting effect is achieved, and therefore the angle of the handrail can be adjusted more comprehensively; and a more comfortable angle can be better adjusted, and the use effect is better.

Description

Technical Field

[0001] The present invention relates to the technical field of wheelchair armrests, in particular to a wheelchair armrest mechanism capable of adjusting height and angle. Background Art

[0002] Wheelchairs generally provide a means of moving from one area to another for individuals who are injured, ill, or otherwise unable to walk independently. In some cases, such individuals, especially those in nursing homes, may spend most of their time each day in a wheelchair. In some cases, from a therapeutic perspective, it is often important to provide comfort and support when these people are in a wheelchair for a long time. In order to avoid discomfort such as fatigue and numbness, wheelchair designs need to provide comfortable support for the individual's lower body, back, and upper body. Specifically, for arm support, it is important to provide properly positioned armrests connected to the wheelchair.

[0003] In the adjustable wheelchair armrest mechanism with Chinese patent application number CN 112370261 B, it includes an armrest and a support mechanism under the armrest, the support mechanism includes at least one support rod, one end of the at least one support rod is movably connected to the armrest so that the front and rear ends of the armrest can rotate around the connection point, and the other end is connected to a rotating mechanism for adjusting the rotation angle of the support rod to drive the armrest to move, and the rotating mechanism is fixed to the side of the wheelchair. The device of the present invention controls the up and down, front and back, and multi-angle adjustment of the armrest through a simple pure mechanical structure, which can meet the diversity of customer use of the product.

[0004] However, based on actual use, the adjustment angle is relatively single and cannot be adjusted to a more comfortable angle, resulting in poor use effect. Summary of the invention

[0005] The object of the present invention is to provide a wheelchair armrest mechanism with adjustable height and angle to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A wheelchair armrest mechanism capable of adjusting height and angle, comprising:

[0008] A mounting seat, an extension frame is mounted on one side of the mounting seat, a mounting hole is opened inside the extension frame, and the mounting seat is fixed on the wheelchair through the mounting hole and fixing bolts inside the extension frame;

[0009] A mounting plate, the mounting plate is mounted on the top of the mounting seat, the mounting plate comprises a first mounting plate and a second mounting plate, the second mounting plate is located on the top of the first mounting plate;

[0010] A side support mechanism, the side support mechanism is installed on one side of the mounting plate, and the side support mechanism supports the side surface through a support pad;

[0011] A lifting mechanism, wherein the lifting mechanism is installed inside the mounting seat, and the lifting mechanism drives the mounting plate at the bottom of the mounting seat to move up and down through the rotation of the threaded rod;

[0012] A connecting mechanism, wherein the connecting mechanism is installed between the first mounting plate and the second mounting plate, and the first mounting plate and the second mounting plate are connected via the connecting mechanism;

[0013] The connecting mechanism comprises a rotating member, a mounting rod, a third spring, a movable rod, a limiting plate, a fourth spring and a limiting member, a rotating groove is provided at the top of the first mounting plate and the bottom of the second mounting plate, the rotating member is rotatably connected inside the rotating groove, the rotating member at the top of the first mounting plate is perpendicular to the rotating axis of the rotating member at the bottom of the second mounting plate, the mounting rod is fixedly mounted on the side wall of the rotating member at the top of the first mounting plate, the movable rod is fixedly mounted on the side wall of the rotating member at the bottom of the second mounting plate, a sliding groove is provided inside the mounting rod, the limiting plate is fixedly mounted on the bottom of the movable rod, the limiting plate is slidably connected inside the sliding groove, the movable rod is slidably connected inside the mounting rod through the limiting plate, the third spring is fixedly mounted on the inner wall of the sliding groove, the top of the third spring is connected to the bottom of the limiting plate, the bottom of the third spring is connected to the inside of the sliding groove, a hole groove is provided inside the limiting plate, the fourth spring is mounted inside the hole groove, the limiting member is fixedly mounted on one end of the fourth spring, and the limiting member is movably connected inside the hole groove through the fourth spring;

[0014] A support mechanism, the support mechanism comprising a first mounting pad and a second mounting pad, the second mounting pad being located at the bottom of the first mounting pad, and a rotating mechanism being arranged between the first mounting pad and the second mounting pad;

[0015] An auxiliary adjustment mechanism is installed between the top of the second mounting plate and the bottom of the first mounting pad, and the position of the first mounting pad on the top of the second mounting plate can be adjusted by the auxiliary adjustment mechanism.

[0016] Optionally, a limiting groove is provided on the inner wall of the sliding groove, the limiting groove matches with the limiting member, and a plurality of limiting grooves are provided.

[0017] Optionally, a plurality of the rotating members and the rotating grooves are provided, and the plurality of the rotating members are rotatably connected inside the plurality of the rotating grooves respectively.

[0018] Optionally, a second electric push rod is fixedly mounted on the inner wall of the hole groove, one end of the fourth spring is fixedly mounted on the output end of the second electric push rod, and the other end of the fourth spring is in contact with the limiting member.

[0019] Optionally, an installation cavity is opened at the bottom of the rotating groove, a first electric push rod is fixedly installed on the inner wall of the installation cavity, a movable plate is fixedly installed on the output end of the first electric push rod, an anti-slip pad is fixedly installed on the top of the movable plate, a plurality of first tooth grooves are opened on the upper surface of the anti-slip pad, a plurality of second tooth grooves are opened on the side wall of the rotating part, and the first tooth grooves are matched with the second tooth grooves.

[0020] Optionally, the lifting mechanism includes a servo motor and a baffle, a mounting groove is opened inside the mounting seat, the servo motor is fixedly installed inside the mounting groove, the threaded rod is fixedly installed at the output end of the servo motor, the threaded rod is rotatably connected to the mounting seat through the servo motor, the baffle is fixedly installed on the top of the threaded rod, a threaded hole is opened inside the first mounting plate, the threaded rod fits with the threaded hole, and the threaded rod is movably connected inside the threaded hole.

[0021] Optionally, the auxiliary adjustment mechanism includes a mounting block, a mounting shaft and a clip, the mounting block is fixedly mounted on the top of the second mounting plate, a slide groove is provided at the bottom of the first mounting pad, the slide groove matches the mounting block, the mounting block is slidably connected to the inside of the slide groove, an active cavity is provided inside the mounting block, the mounting shaft is rotatably connected to the inside of the active cavity by a torsion spring, the clip is fixedly mounted on the side wall of the mounting shaft, a clip groove is provided on the inner wall of the slide groove, a plurality of clip grooves are provided, and the plurality of clip grooves are matched with the clip.

[0022] Optionally, a groove is provided inside the clamping member, a first spring is fixedly mounted on the inner wall of the groove, a support member is fixedly mounted on one end of the first spring, and the support member is located at one side of the clamping groove.

[0023] Optionally, the rotating mechanism includes a mounting plate, a second spring and a clamping block, the mounting plate is fixedly mounted on the top of the first mounting pad, the second mounting pad is rotatably connected to the side wall of the mounting plate, the inner wall of the second mounting pad is provided with a movable groove, the second spring is fixedly mounted on the inner wall of the movable groove, the clamping block is fixedly mounted on one end of the second spring, the side wall of the mounting plate is provided with a clamping groove, there are several clamping grooves, and the several clamping grooves are all matched with the clamping block.

[0024] Optionally, the side support mechanism includes a fixed frame, a connecting frame, a movable frame, a slider and a matching piece, the fixed frame is fixedly mounted on one side of the first mounting plate, the slider is fixedly mounted on one side of the movable frame, the matching piece is rotatably connected to the inside of the slider, a matching groove is opened on one side of the second mounting plate, the slider is slidably connected to the inside of the matching groove, the movable frame is slidably connected to one side of the second mounting plate through the slider, one end of the connecting frame is rotatably connected to the inside of the fixed frame, the other end of the connecting frame is rotatably connected to the inside of the movable frame, and the support pad is fixedly mounted on one side of the connecting frame.

[0025] The present invention has at least the following beneficial effects:

[0026] (1) This solution sets a connection mechanism, and sets the rotating member at the top of the first mounting plate and the rotating member at the bottom of the second mounting plate to be perpendicular to the rotating axis. When the second mounting plate is pushed forward and backward, the rotating member at the top of the first mounting plate can be rotated to move the second mounting plate forward and backward. When the second mounting plate needs to be pushed sideways, the rotating member at the bottom of the second mounting plate can be rotated to move the second mounting plate sideways. By setting the mounting rod and the movable rod, the distance between the second mounting plate and the first mounting plate can be slightly adjusted, which has a certain effect of adjusting the height, so that the angle of the armrest can be adjusted more comprehensively, and can be better adjusted to a more comfortable angle, and the use effect is better;

[0027] (2) In this scheme, a second electric push rod is provided, and the fourth spring can be compressed by extending the second electric push rod, so that the limit member cannot be retracted into the hole groove, so that the movable rod can be fixed inside the mounting rod, and the first electric push rod can be provided to drive the movable plate to move up and down, so that the anti-skid pad on the top of the movable plate can be driven to move, and the anti-skid pad can move upward to make the first tooth groove on the top of the anti-skid pad fit with the second tooth groove on the side wall of the rotating member, so that the rotating member can be limited and fixed, so that the rotating member cannot rotate. When the angle of the armrest needs to be adjusted, the anti-skid pad is separated from the rotating member by retracting the first electric push rod, so that the rotating member can rotate freely, and the angle of the armrest can be adjusted by pressing the second mounting plate with the arm to drive the second mounting plate to move. After the adjustment is completed, the first electric push rod is extended, so that the anti-skid pad moves upward to make the first tooth groove on the top of the anti-skid pad fit with the second tooth groove on the side wall of the rotating member, so that the rotating member can be limited and fixed;

[0028] (3) This solution provides an auxiliary adjustment mechanism. When the position of the first mounting pad needs to be adjusted, the first mounting pad can be pushed with force to enable the clamping member to be disengaged from the current clamping slot and clamped into the next clamping slot. Thus, the first mounting pad can be more stably fixed on the top of the second mounting plate without affecting the adjustment of the first mounting pad, thereby facilitating the adjustment of the position of the first mounting pad.

[0029] (4) This solution provides a side support mechanism and a slider so that the movable frame can slide on one side of the second mounting plate, so that the movable frame can still correspond to the fixed frame after the second mounting plate is adjusted, thereby avoiding pulling the connecting frame. By rotating the two ends of the connecting frame inside the fixed frame and the movable frame respectively, the second mounting plate can still be located on one side of the mounting plate after adjustment, so that the support pad on one side of the connecting frame can still maintain the supporting effect, thereby better supporting the side. At the same time, the design of the connecting frame can play a certain protective role. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0031] Figure 1 It is a schematic diagram of the structure of the present invention;

[0032] Figure 2 It is a structural schematic diagram of one side of the present invention;

[0033] Figure 3 This is a schematic diagram of the mounting plate structure of the present invention;

[0034] Figure 4 This is a schematic diagram of the structure of the slider of the present invention;

[0035] Figure 5 It is a partial cross-sectional structural schematic diagram of the mounting seat of the present invention;

[0036] Figure 6 It is a partial cross-sectional structural schematic diagram of the first mounting plate of the present invention;

[0037] Figure 7 This is a schematic diagram of the structure of the anti-slip mat of the present invention;

[0038] Figure 8 It is a schematic diagram of the cross-sectional structure of the mounting rod of the present invention;

[0039] Fig. 9 It is a schematic diagram of the cross-sectional structure of the limiting disk of the present invention;

[0040] Fig.10 This is a schematic diagram of the structure of the second mounting plate of the present invention;

[0041] Fig.11 It is a partial cross-sectional structural schematic diagram of the first mounting pad of the present invention;

[0042] Fig.12 For the present invention Fig.11 The enlarged structural diagram at A in the middle;

[0043] Fig.13 It is a partial cross-sectional structural schematic diagram of the clamping member of the present invention;

[0044] Fig.14 It is a schematic diagram of a partial cross-sectional structure of the second mounting pad of the present invention.

[0045] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0046] 1. Mounting seat; 101. Extension frame; 102. Mounting hole; 103. Mounting slot; 1031. Servo motor; 104. Threaded rod; 105. Baffle; 106. Threaded hole; 2. First mounting plate; 201. Second mounting plate; 202. Mounting cavity; 203. Rotating groove; 204. Mounting block; 2041. Active cavity; 2042. Mounting shaft; 2043. Snap-on member; 20431. Groove; 20432. First spring; 2044. Support member; 205. Slide; 2051. Snap-on groove; 3. First mounting pad; 3001. Mounting plate; 3002. Slot; 301. Second mounting pad; 3011. Active groove; 3012. First Second spring; 3013, block; 4, connecting mechanism; 401, first electric push rod; 402, movable plate; 403, anti-skid pad; 404, first tooth groove; 405, rotating member; 4051, second tooth groove; 406, mounting rod; 4061, sliding groove; 4062, limiting groove; 4063, third spring; 407, movable rod; 4071, limiting plate; 4072, hole groove; 4073, second electric push rod; 4074, fourth spring; 4075, limiting member; 5, side support mechanism; 501, matching groove; 502, fixed frame; 503, connecting frame; 504, movable frame; 505, slider; 506, matching member; 507, supporting pad. DETAILED DESCRIPTION

[0047] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0048] See also Figure 1-Figure 14 The present invention provides a wheelchair armrest mechanism capable of adjusting height and angle, comprising:

[0049] A mounting seat 1, an extension frame 101 is installed on one side of the mounting seat 1, a mounting hole 102 is opened inside the extension frame 101, and the mounting seat 1 is fixed to the wheelchair through the mounting hole 102 inside the extension frame 101 and the fixing bolts;

[0050] A mounting plate, the mounting plate is mounted on the top of the mounting seat 1, the mounting plate includes a first mounting plate 2 and a second mounting plate 201, and the second mounting plate 201 is located on the top of the first mounting plate 2;

[0051] A side support mechanism 5, which is mounted on one side of the mounting plate, and supports the side surface of the side support mechanism 5 through a support pad 507;

[0052] A lifting mechanism, which is installed inside the mounting seat 1, and the lifting mechanism drives the mounting plate at the bottom of the mounting seat 1 to move up and down through the rotation of the threaded rod 104;

[0053] A connecting mechanism 4, which is installed between the first mounting plate 2 and the second mounting plate 201, and the first mounting plate 2 and the second mounting plate 201 are connected via the connecting mechanism 4;

[0054] Support mechanism, the support mechanism includes a first mounting pad 3 and a second mounting pad 301, the second mounting pad 301 is located at the bottom of the first mounting pad 3, and a rotating mechanism is provided between the first mounting pad 3 and the second mounting pad 301;

[0055] The auxiliary adjustment mechanism is installed between the top of the second mounting plate 201 and the bottom of the first mounting pad 3. The position of the first mounting pad 3 at the top of the second mounting plate 201 can be adjusted through the auxiliary adjustment mechanism.

[0056] In some embodiments, see Figure 2 , Figure 3 , Figure 6 , Figure 7 , Figure 8 , Fig. 9The connecting mechanism 4 includes a rotating member 405, a mounting rod 406, a third spring 4063, a movable rod 407, a limiting plate 4071, a fourth spring 4074 and a limiting member 4075. A rotating groove 203 is provided at the top of the first mounting plate 2 and at the bottom of the second mounting plate 201. The rotating member 405 is rotatably connected inside the rotating groove 203. The rotating member 405 at the top of the first mounting plate 2 is perpendicular to the rotating axis of the rotating member 405 at the bottom of the second mounting plate 201. The mounting rod 406 is fixedly mounted on the side wall of the rotating member 405 at the top of the first mounting plate 2. The movable rod 407 is fixedly mounted on the side wall of the rotating member 405 at the bottom of the second mounting plate 201. A sliding groove 4061 is provided inside the mounting rod 406. The limiting plate 4071 is fixedly mounted on the movable rod 4074. At the bottom of the movable rod 407, the limit plate 4071 is slidably connected to the inside of the sliding groove 4061, the movable rod 407 is slidably connected to the inside of the mounting rod 406 through the limit plate 4071, the third spring 4063 is fixedly installed on the inner wall of the sliding groove 4061, the top of the third spring 4063 is connected to the bottom of the limit plate 4071, the bottom of the third spring 4063 is connected to the inside of the sliding groove 4061, a hole groove 4072 is opened inside the limit plate 4071, the fourth spring 4074 is installed inside the hole groove 4072, the limit member 4075 is fixedly installed on one end of the fourth spring 4074, the limit member 4075 is movably connected to the inside of the hole groove 4072 through the fourth spring 4074, the inner wall of the sliding groove 4061 is provided with a limit groove 4062, the limit The groove 4062 is matched with the limiting member 4075. There are several limiting grooves 4062. The limiting plate 4071 can be supported by the third spring 4063. The limiting plate 4071 can be pushed upward by the third spring 4063. The limiting member 4075 can be supported by the fourth spring 4074 so that the limiting member 4075 can be inserted into the limiting groove 4062. When the limiting plate 4071 moves, the limiting member 4075 will be squeezed and compressed back into the limiting groove 4062 first, until it corresponds to the limiting groove 4062, and then it will be pushed into the limiting groove 4062 by the fourth spring 4074. By setting several limiting grooves 4062, the movable rod 407 can be inserted into different limiting grooves 4062 after adjustment. The rotation limit is achieved by setting the rotating member 405 at the top of the first mounting plate 2 and the rotating axis of the rotating member 405 at the bottom of the second mounting plate 201 to be perpendicular. When the second mounting plate 201 is pushed back and forth, the rotating member 405 at the top of the first mounting plate 2 can be rotated to move the second mounting plate 201 back and forth. When the second mounting plate 201 needs to be pushed sideways, the rotating member 405 at the bottom of the second mounting plate 201 can be rotated to move the second mounting plate 201 sideways. By setting the mounting rod 406 and the movable rod 407, the distance between the second mounting plate 201 and the first mounting plate 2 can be slightly adjusted, which has a certain effect of adjusting the height, so that the armrest angle can be adjusted more comprehensively, and can be better adjusted to a more comfortable angle, with a better use effect.

[0057] In some embodiments, see Figure 8 , Fig. 9 , there are several rotating members 405 and rotating grooves 203, and the several rotating members 405 are rotatably connected inside the several rotating grooves 203 respectively. A second electric push rod 4073 is fixedly installed on the inner wall of the hole groove 4072, and one end of the fourth spring 4074 is fixedly installed on the output end of the second electric push rod 4073. The other end of the fourth spring 4074 contacts with the limiting member 4075. By setting the second electric push rod 4073, the fourth spring 4074 can be compressed by extending the second electric push rod 4073, so that the limiting member 4075 cannot be retracted into the hole groove 4072, so that the movable rod 407 can be fixed inside the mounting rod 406.

[0058] In some embodiments, see Figure 6 , Figure 7 The bottom of the rotating groove 203 is provided with an installation cavity 202, the inner wall of the installation cavity 202 is fixedly installed with a first electric push rod 401, the output end of the first electric push rod 401 is fixedly installed with a movable plate 402, the top of the movable plate 402 is fixedly installed with an anti-skid pad 403, the upper surface of the anti-skid pad 403 is provided with a plurality of first tooth grooves 404, the side wall of the rotating member 405 is provided with a plurality of second tooth grooves 4051, the first tooth grooves 404 and the second tooth grooves 4051 are matched, and the movable plate 402 can be driven to move up and down by setting the first electric push rod 401, so as to drive the anti-skid pad 403 on the top of the movable plate 402 to move, and the first tooth groove 404 on the top of the anti-skid pad 403 can be moved upward by moving the anti-skid pad 403 upward. 04 is matched with the second tooth groove 4051 on the side wall of the rotating member 405, so that the rotating member 405 can be limited and fixed, so that the rotating member 405 cannot rotate. When the angle of the armrest needs to be adjusted, the first electric push rod 401 is retracted to make the anti-skid pad 403 disengage from the rotating member 405, so that the rotating member 405 can be rotated at will. The second mounting plate 201 is pressed by the arm to drive the second mounting plate 201 to move, so as to adjust the angle of the armrest. After the adjustment is completed, the first electric push rod 401 is extended to move the anti-skid pad 403 upward so that the first tooth groove 404 on the top of the anti-skid pad 403 can be matched with the second tooth groove 4051 on the side wall of the rotating member 405, so that the rotating member 405 can be limited and fixed.

[0059] In some embodiments, see Figure 1 , Figure 3 , Figure 5The lifting mechanism includes a servo motor 1031 and a baffle 105. A mounting groove 103 is provided inside the mounting seat 1. The servo motor 1031 is fixedly installed inside the mounting groove 103. The threaded rod 104 is fixedly installed at the output end of the servo motor 1031. The threaded rod 104 is rotatably connected to the inside of the mounting seat 1 through the servo motor 1031. The baffle 105 is fixedly installed on the top of the threaded rod 104. A threaded hole 106 is provided inside the first mounting plate 2. The threaded rod 104 fits with the threaded hole 106. The threaded rod 104 is movably connected inside the threaded hole 106. The rotation of the threaded rod 104 can be controlled by setting the servo motor 1031. The first mounting plate 2 moves up and down along the side wall of the threaded rod 104 by rotating the threaded rod 104 and fitting it with the threaded hole 106, so that the height of the mounting plate can be adjusted, which has the effect of adjusting the height. The baffle 105 can prevent the threaded rod 104 from rotating excessively and disengaging from the threaded hole 106.

[0060] In some embodiments, see Fig.10 , Fig.11 , Fig.12 , Fig.13 The auxiliary adjustment mechanism includes a mounting block 204, a mounting shaft 2042 and a clamping member 2043. The mounting block 204 is fixedly mounted on the top of the second mounting plate 201. A slide groove 205 is provided at the bottom of the first mounting pad 3. The slide groove 205 matches the mounting block 204. The mounting block 204 is slidably connected inside the slide groove 205. An active cavity 2041 is provided inside the mounting block 204. The mounting shaft 2042 is rotatably connected inside the active cavity 2041 through a torsion spring. The clamping member 2043 is fixedly mounted on the side wall of the mounting shaft 2042. A clamping groove 2051 is provided on the inner wall of the slide groove 205. The clamping groove 2051 is provided with a plurality of clamping grooves, and the plurality of clamping grooves 2051 are all matched with the clamping member 2043. A groove 20431 is provided inside the clamping member 2043. A first spring 20432 is fixedly installed on the inner wall of the groove 20431. A support member 2044 is fixedly installed on one end of the first spring 20432. The support piece 2044 is located on one side of the clamping slot 2051. By setting the slide slot 205, the first mounting pad 3 can slide on the top of the second mounting plate 201 through the slide slot 205. By setting the torsion spring, the mounting shaft 2042 can be driven to rotate to one side, so that the clamping piece 2043 can be clamped into the clamping slot 2051, thereby fixing the position of the first mounting pad 3. By setting the first spring 20432, the support piece 2044 can be supported so that the support piece 2044 can be located on one side of the clamping slot 2051. When the position of the first mounting pad 3 needs to be adjusted, the first mounting pad 3 can be pushed hard to make the clamping piece 2043 disengage from the current clamping slot 2051 and clamp into the next clamping slot 2051. Therefore, the first mounting pad 3 can be more stably fixed on the top of the second mounting plate 201 without affecting the adjustment of the first mounting pad 3, so that the use effect of the armrest is better.

[0061] In some embodiments, see Fig.11 , Fig.14 The rotating mechanism includes a mounting plate 3001, a second spring 3012 and a clamping block 3013. The mounting plate 3001 is fixedly mounted on the top of the first mounting pad 3. The second mounting pad 301 is rotatably connected to the side wall of the mounting plate 3001. The inner wall of the second mounting pad 301 is provided with a movable groove 3011. The second spring 3012 is fixedly mounted on the inner wall of the movable groove 3011. The clamping block 3013 is fixedly mounted on one end of the second spring 3012. The side wall of the mounting plate 3001 is provided with a clamping groove 3002. The clamping groove 3002 is provided with Several, several slots 3002 are matched with the block 3013. By setting the second spring 3012, the block 3013 can be supported. By setting the slot 3002, the block 3013 can be inserted into the slot 3002 to fix the second mounting pad 301. The slot 3002 and the block 3013 are both triangular, so that the second mounting pad 301 can be fixed without affecting the rotation of the second mounting pad 301, thereby preventing the second mounting pad 301 from rotating at will when no adjustment is needed.

[0062] In some embodiments, see Figure 2 , Figure 3 , Figure 4 The side support mechanism 5 includes a fixed frame 502, a connecting frame 503, a movable frame 504, a slider 505 and a matching piece 506. The fixed frame 502 is fixedly mounted on one side of the first mounting plate 2, the slider 505 is fixedly mounted on one side of the movable frame 504, the matching piece 506 is rotatably connected inside the slider 505, a matching groove 501 is provided on one side of the second mounting plate 201, the slider 505 is slidably connected inside the matching groove 501, the movable frame 504 is slidably connected to one side of the second mounting plate 201 through the slider 505, one end of the connecting frame 503 is rotatably connected inside the fixed frame 502, and the other end of the connecting frame 503 is rotatably connected inside the movable frame 504, the support pad 50 7 is fixedly installed on one side of the connecting frame 503, and the movable frame 504 can slide on the side of the second mounting plate 201 by setting a slider 505, so that the movable frame 504 can still correspond to the fixed frame 502 after the second mounting plate 201 is adjusted, so as to avoid pulling the connecting frame 503, and the two ends of the connecting frame 503 are rotated respectively inside the fixed frame 502 and the movable frame 504, so that the second mounting plate 201 can still be located on one side of the mounting plate after adjustment, so that the support pad 507 on one side of the connecting frame 503 can still maintain the supporting effect, so as to better support the side, and at the same time, the design of the connecting frame 503 can play a certain protective role.

[0063] The working process and principle of the present invention are as follows: when in use, the mounting seat 1 is fixedly mounted on the wheelchair through the fixing bolts and the mounting hole 102 inside the extension frame 101, and the threaded rod 104 can be controlled to rotate by the servo motor 1031. The threaded rod 104 rotates and fits with the threaded hole 106 to make the first mounting plate 2 move up and down along the side wall of the threaded rod 104, so that the height of the mounting plate can be adjusted, which has the effect of adjusting the height. The height of the armrest is preliminarily adjusted. When the armrest angle needs to be adjusted, the anti-slip pad 403 is disengaged from the rotating member 405 by retracting the first electric push rod 401, so that the rotating member 405 can be rotated at will, and the second mounting plate 201 is pressed by the arm to drive the second mounting plate 201 to move forward, backward or sideways to adjust the armrest. When the second mounting plate 201 is pushed back and forth, the rotating member 405 at the top of the first mounting plate 2 can be rotated to move the second mounting plate 201 forward and backward. When the second mounting plate 201 is pushed sideways, the rotating member 405 at the bottom of the second mounting plate 201 can be rotated to move the second mounting plate 201 sideways. After the adjustment is completed, the first electric push rod 401 extends to move the anti-skid pad 403 upward so that the first tooth groove 404 at the top of the anti-skid pad 403 can fit with the second tooth groove 4051 on the side wall of the rotating member 405, so that the rotating member 405 can be limited and fixed. By setting the mounting rod 406 and the movable rod 407, the distance between the second mounting plate 201 and the first mounting plate 2 can be slightly adjusted, which plays a certain role. The effect of adjusting the height is that when it is necessary to fine-tune the height, the fourth spring 4074 extends when the second electric push rod 4073 retracts, and the second mounting plate 201 can be moved down by pressing the second mounting plate 201 with the arm, and the second mounting plate 201 can be pushed up by the third spring 4063 when the arm is lifted. When the height fine-tuning is completed, the second electric push rod 4073 extends to compress the fourth spring 4074, so that the limit member 4075 cannot be retracted into the hole groove 4072, so that the movable rod 407 can be fixed inside the mounting rod 406. When the position of the first mounting pad 3 needs to be adjusted, the first mounting pad 3 can be pushed hard to make the clamping member 2043 disengage from the current clamping groove 2051 and clamp into the next clamping groove 2051, so as to adjust the position of the first mounting pad 3. Without affecting the adjustment of the first mounting pad 3, the first mounting pad 3 can be more stably fixed on the top of the second mounting plate 201, thereby facilitating the adjustment of the position of the first mounting pad 3. When the angle of the second mounting pad 301 needs to be adjusted, the second mounting pad 301 is rotated to retract the clamping block 3013 into the movable groove 3011. After the adjustment is completed, the clamping block 3013 is pushed into the clamping groove 3002 by the second spring 3012 to prevent the second mounting pad 301 from rotating at will when no adjustment is needed. By setting the slider 505, the movable frame 504 can slide on one side of the second mounting plate 201, so that the movable frame 504 can still correspond to the fixed frame 502 after the second mounting plate 201 is adjusted, thereby avoiding pulling the connecting frame 503.By rotating the two ends of the connecting frame 503 inside the fixed frame 502 and the movable frame 504 respectively, the connecting frame 503 can still be located on one side of the mounting plate after the second mounting plate 201 is adjusted, so that the support pad 507 on one side of the connecting frame 503 can still maintain the supporting effect, so that the side can be better supported. At the same time, the design of the connecting frame 503 can play a certain protective role.

[0064] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0065] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A wheelchair armrest mechanism with adjustable height and angle, characterized in that: include: A mounting seat (1), an extension frame (101) being mounted on one side of the mounting seat (1), a mounting hole (102) being provided inside the extension frame (101), and the mounting seat (1) being fixedly mounted on the wheelchair via the mounting hole (102) inside the extension frame (101) and fixing bolts; A mounting plate, the mounting plate being mounted on the top of the mounting seat (1), the mounting plate comprising a first mounting plate (2) and a second mounting plate (201), the second mounting plate (201) being located on the top of the first mounting plate (2); A side support mechanism (5), the side support mechanism (5) being mounted on one side of the mounting plate, the side support mechanism (5) supporting the side surface via a support pad (507); A lifting mechanism, the lifting mechanism being installed inside the mounting seat (1), the lifting mechanism driving the mounting plate at the bottom of the mounting seat (1) to move up and down by rotating the threaded rod (104); A connecting mechanism (4), wherein the connecting mechanism (4) is installed between the first mounting plate (2) and the second mounting plate (201), and the first mounting plate (2) and the second mounting plate (201) are connected via the connecting mechanism (4); The connecting mechanism (4) comprises a rotating member (405), a mounting rod (406), a third spring (4063), a movable rod (407), a limiting plate (4071), a fourth spring (4074) and a limiting member (4075); a rotating groove (203) is provided at the top of the first mounting plate (2) and the bottom of the second mounting plate (201); the rotating member (405) is rotatably connected inside the rotating groove (203); the rotating member (405) at the top of the first mounting plate (2) and the rotating member (405) at the bottom of the second mounting plate (201) are perpendicular to each other in terms of their rotation axes; the mounting rod (406) is fixedly mounted on the side wall of the rotating member (405) at the top of the first mounting plate (2); the movable rod (407) is fixedly mounted on the side wall of the rotating member (405) at the bottom of the second mounting plate (201); a sliding groove (4061) is provided inside the mounting rod (406); The plate (4071) is fixedly mounted on the bottom of the movable rod (407), the limiting plate (4071) is slidably connected to the inside of the sliding groove (4061), the movable rod (407) is slidably connected to the inside of the mounting rod (406) through the limiting plate (4071), the third spring (4063) is fixedly mounted on the inner wall of the sliding groove (4061), and the top of the third spring (4063) is connected to the bottom of the limiting plate (4071), The bottom of the third spring (4063) is connected to the inside of the sliding groove (4061), a hole groove (4072) is provided inside the limiting plate (4071), the fourth spring (4074) is installed inside the hole groove (4072), the limiting member (4075) is fixedly installed on one end of the fourth spring (4074), and the limiting member (4075) is movably connected to the inside of the hole groove (4072) through the fourth spring (4074); A support mechanism, the support mechanism comprising a first mounting pad (3) and a second mounting pad (301), the second mounting pad (301) being located at the bottom of the first mounting pad (3), and a rotating mechanism being provided between the first mounting pad (3) and the second mounting pad (301); An auxiliary adjustment mechanism is installed between the top of the second mounting plate (201) and the bottom of the first mounting pad (3), and the position of the first mounting pad (3) on the top of the second mounting plate (201) can be adjusted by the auxiliary adjustment mechanism.

2. A wheelchair armrest mechanism with adjustable height and angle according to claim 1, characterized in that: The inner wall of the sliding groove (4061) is provided with a limiting groove (4062), and the limiting groove (4062) is matched with the limiting member (4075), and a plurality of limiting grooves (4062) are provided.

3. A wheelchair armrest mechanism with adjustable height and angle according to claim 2, characterized in that: A plurality of the rotating members (405) and the rotating grooves (203) are provided, and the plurality of the rotating members (405) are rotatably connected inside the plurality of the rotating grooves (203) respectively.

4. The wheelchair armrest mechanism with adjustable height and angle according to claim 2, characterized in that: A second electric push rod (4073) is fixedly mounted on the inner wall of the hole groove (4072), one end of the fourth spring (4074) is fixedly mounted on the output end of the second electric push rod (4073), and the other end of the fourth spring (4074) is in contact with the limiting member (4075).

5. The wheelchair armrest mechanism with adjustable height and angle according to claim 2, characterized in that: A mounting cavity (202) is provided at the bottom of the rotating groove (203), a first electric push rod (401) is fixedly installed on the inner wall of the mounting cavity (202), a movable plate (402) is fixedly installed on the output end of the first electric push rod (401), an anti-skid pad (403) is fixedly installed on the top of the movable plate (402), a plurality of first tooth grooves (404) are provided on the upper surface of the anti-skid pad (403), a plurality of second tooth grooves (4051) are provided on the side wall of the rotating member (405), and the first tooth grooves (404) and the second tooth grooves (4051) are matched with each other.

6. The wheelchair armrest mechanism with adjustable height and angle according to claim 1, characterized in that: The lifting mechanism comprises a servo motor (1031) and a baffle (105); a mounting groove (103) is provided inside the mounting seat (1); the servo motor (1031) is fixedly installed inside the mounting groove (103); the threaded rod (104) is fixedly installed at the output end of the servo motor (1031); the threaded rod (104) is rotatably connected inside the mounting seat (1) through the servo motor (1031); the baffle (105) is fixedly installed on the top of the threaded rod (104); a threaded hole (106) is provided inside the first mounting plate (2); the threaded rod (104) fits with the threaded hole (106); and the threaded rod (104) is movably connected inside the threaded hole (106).

7. The wheelchair armrest mechanism with adjustable height and angle according to claim 1, characterized in that: The auxiliary adjustment mechanism comprises a mounting block (204), a mounting shaft (2042) and a clamping member (2043); the mounting block (204) is fixedly mounted on the top of the second mounting plate (201); a slide groove (205) is provided at the bottom of the first mounting pad (3); the slide groove (205) matches the mounting block (204); the mounting block (204) is slidably connected inside the slide groove (205); an active cavity (2041) is provided inside the mounting block (204); the mounting shaft (2042) is rotatably connected inside the active cavity (2041) through a torsion spring; the clamping member (2043) is fixedly mounted on the side wall of the mounting shaft (2042); a clamping groove (2051) is provided on the inner wall of the slide groove (205); a plurality of the clamping grooves (2051) are provided, and the plurality of the clamping grooves (2051) are matched with the clamping member (2043).

8. The wheelchair armrest mechanism with adjustable height and angle according to claim 7, characterized in that: A groove (20431) is provided inside the clamping member (2043), a first spring (20432) is fixedly installed on the inner wall of the groove (20431), a support member (2044) is fixedly installed on one end of the first spring (20432), and the support member (2044) is located on one side of the clamping groove (2051).

9. The wheelchair armrest mechanism with adjustable height and angle according to claim 1, characterized in that: The rotating mechanism comprises a mounting plate (3001), a second spring (3012) and a clamping block (3013); the mounting plate (3001) is fixedly mounted on the top of the first mounting pad (3); the second mounting pad (301) is rotatably connected to the side wall of the mounting plate (3001); a movable groove (3011) is provided on the inner wall of the second mounting pad (301); the second spring (3012) is fixedly mounted on the inner wall of the movable groove (3011); the clamping block (3013) is fixedly mounted on one end of the second spring (3012); a clamping groove (3002) is provided on the side wall of the mounting plate (3001); a plurality of the clamping grooves (3002) are provided, and the plurality of the clamping grooves (3002) are matched with the clamping block (3013).

10. The wheelchair armrest mechanism with adjustable height and angle according to claim 1, characterized in that: The side support mechanism (5) comprises a fixed frame (502), a connecting frame (503), a movable frame (504), a slider (505) and a matching piece (506); the fixed frame (502) is fixedly mounted on one side of the first mounting plate (2); the slider (505) is fixedly mounted on one side of the movable frame (504); the matching piece (506) is rotatably connected inside the slider (505); a matching groove (501) is provided on one side of the second mounting plate (201); the slider (505) is slidably connected inside the matching groove (501); the movable frame (504) is slidably connected to one side of the second mounting plate (201) through the slider (505); one end of the connecting frame (503) is rotatably connected inside the fixed frame (502); the other end of the connecting frame (503) is rotatably connected inside the movable frame (504); and the support pad (507) is fixedly mounted on one side of the connecting frame (503).

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