Shank telescopic device and massage chair

Abstract

A crus telescopic device and a massage armchair comprise an upper crus part, a crus part movably matched with the upper crus part and a limiting mechanism arranged on the upper crus part, the limiting mechanism comprises a limiting switch and a clamping part in transmission connection with the limiting switch, and a plurality of buckles are arranged on the lower crus part in the sliding direction of the lower crus part. The clamping part is driven by the limiting switch to be clamped in the clamping grooves, and when the lower shank part extends outwards, the clamping part can be clamped in the other clamping groove from one clamping groove. Therefore, a plurality of clamping grooves are additionally formed on the basis of the pedal spring shank, so that the limiting mechanism is clamped in any clamping groove in the extending process of the lower shank part, the pedal spring shank has a position adjusting function, the situation that the feet of a user need to be continuously stressed to abut against the lower shank part all the time is avoided, and user experience is improved; meanwhile, compared with an electric telescopic shank, the arrangement of a motor is avoided, the production cost is saved, the internal space of the shank part is also saved, the arrangement of the shank part is more compact, and the requirement for the use space is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of massage equipment, in particular to a calf extension and retraction device and a massage chair. Background Art

[0002] In order to meet the needs of users of different heights, the calf massage part of the massage chair has a retractable function, which usually includes an electric retractable calf and a pedal spring calf. The electric retractable calf uses a motor and a sensor to achieve the retraction and extension of the calf massage part, but the price is relatively high. The pedal spring calf uses a spring and the user's foot to achieve the retraction and extension of the calf massage part. Although it is cheap, the human foot needs to be continuously subjected to force to massage the calf, resulting in a poor physical sensation for consumers. Utility Model Content

[0003] In view of the shortcomings of the background technology, the purpose of the present invention is to provide a calf extension and retraction device and a massage chair.

[0004] To achieve the above objectives, the present invention provides the following technical solutions:

[0005] A calf expansion and contraction device, comprising:

[0006] Upper calf;

[0007] a lower calf portion, slidably adapted to the upper calf portion, a first elastic member being provided between the upper calf portion and the lower calf portion, and a plurality of slots being provided on the lower calf portion along its sliding direction; and

[0008] A limit mechanism includes a limit switch and a clamping portion transmission-connected to the limit switch, wherein the limit switch and the clamping portion are movably adapted to the upper calf portion, and a second elastic member is provided between the clamping portion and the upper calf portion;

[0009] When the limit switch is in an open state due to an external force, the limit switch drives the clamping portion to be clamped in the clamping slot, and when the lower leg portion extends outward, the clamping portion is disengaged from the clamping slot and clamped in another clamping slot;

[0010] When the external force disappears and the limit switch is in the closed state, the clamping portion is disengaged from the clamping slot under the elastic force of the second elastic member and drives the limit switch to return to its initial position, and the lower calf portion is reset to its initial position under the elastic force of the first elastic member.

[0011] Furthermore, the lower calf portion includes a lower calf massage portion and a limit baffle fixedly connected to the lower calf massage portion, the limit baffle is provided with the card slot, the upper end surface of each card slot is a first guide surface, and the lower end surface of each card slot is a first locking surface.

[0012] Furthermore, the clamping part includes a box body and a limit block body movably arranged in the box body, the two ends of the second elastic member are respectively connected to the upper calf part and the box body, and a third elastic member is provided between the limit block body and the box body. The limit block body is clamped in the clamping slot under the action of the third elastic member.

[0013] Furthermore, the upper end surface of the limit block body that is clamped to the slot is provided with a second guide surface adapted to the first guide surface, and the lower end surface of the limit block body that is clamped to the slot is provided with a second locking surface adapted to the first locking surface.

[0014] Furthermore, an anti-slip protrusion extending radially outward is provided on the outer side of the limit block body, and the anti-slip protrusion is located in the box body. One end of the third elastic member abuts against the anti-slip protrusion, and the other end of the third elastic member abuts against the box body. Under the action of the third elastic member, the anti-slip protrusion can abut against the inner wall of the box body.

[0015] Furthermore, the upper calf part includes an upper calf massage part and a top plate fixedly connected to the upper calf massage part, and a first slide groove and a second slide groove are provided on one side of the top plate. The limit switch is slidably adapted to the first slide groove, and the box body is slidably adapted to the second slide groove.

[0016] Furthermore, the first slide groove is arranged along the length direction of the top plate, the second slide groove has an inclined angle with the top plate, and the end of the second slide groove close to the top plate is lower than the end of the second slide groove away from the top plate.

[0017] Furthermore, rollers adapted to the first slide groove are provided on both sides of one end of the limit switch, the other end of the limit switch is passed through the top plate, and a fourth elastic member is connected between the limit switch and the top plate; a slider adapted to the second slide groove is provided on the outside of the box body.

[0018] Furthermore, it also includes a connecting member, one end of which is connected to the limit switch, and the other end of which is connected to the box body.

[0019] A massage chair, comprising a base, the base being hingedly connected to a back frame, and further comprising the calf retracting device as described above, wherein the upper calf portion is hingedly connected to the back frame; further comprising a pushing device and a calf push rod, wherein one end of the pushing device is hingedly connected to the base, and the other end of the pushing device is hingedly connected to the middle portion of the calf push rod, one end of the calf push rod is hingedly connected to the back frame, and the other end of the calf push rod is movably abutted against the upper calf portion;

[0020] The pushing device drives the calf push rod to rotate, so that the other end of the calf push rod moves on the upper calf part and pushes or disengages from the limit switch, so that the limit switch is in an open state or a closed state.

[0021] The beneficial effects of the utility model are:

[0022] 1. The present invention provides a calf extension and retraction device comprising an upper calf portion, a calf portion adapted to fit the upper calf portion, and a limiting mechanism provided on the upper calf portion. The limiting mechanism comprises a limit switch and a latching portion connected to the limit switch. The lower calf portion is provided with a plurality of latches along its sliding direction. The latching portion is driven by the limit switch to engage with a latching slot. When the lower calf portion is extended outward, the latching portion can engage with any of the latching slots. Therefore, a plurality of latching slots are added to the foot pedal spring calf portion so that the limiting mechanism engages with any of the latching slots during the extension of the lower calf portion. This allows the foot pedal spring calf portion to have a position adjustment function, thereby preventing the user's foot from being continuously pressed against the lower calf portion, thereby improving the user experience. Furthermore, compared to an electrically retractable calf portion, the present invention avoids the need for a motor, thereby saving production costs and space within the calf portion, making the calf portion layout more compact and reducing the need for space.

[0023] 2. The utility model proposes a calf extension and retraction device, in which a limit baffle is provided with a card slot, the upper end surface of each card slot is a first guide surface, the lower end surface of each card slot is a first locking surface, and the limit block body is provided with a second guide surface and a second locking surface. The cooperation of the first guide surface and the second guide surface makes it easy for the limit block body to detach from the card slot during the extension process of the lower calf, and the cooperation of the first locking surface and the second locking surface can prevent the lower calf from retracting, thereby avoiding continuous force on the user's feet.

[0024] 3. The utility model proposes a calf extension and retraction device, in which an anti-slip protrusion extending radially outward is provided on the outer side of the limit block body. The anti-slip protrusion abuts against the inner wall of the box body under the action of the third elastic member, preventing the limit block body from detaching from the box body under the action of the third elastic member, thereby ensuring the normal operation of the limit mechanism.

[0025] 4. The massage chair proposed by the utility model drives the calf push rod to rotate through the pushing device, so that the other end of the calf push rod moves on the upper calf part, pushes the limit switch during the rising and lowering process of the calf part, so that the limit switch is in the open state, and disengages from the limit switch during the descending process of the calf part, so that the limit switch is in the closed state, thereby realizing the linkage between the lifting and lowering of the calf part and the opening and closing of the limit mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0027] Figure 1 This is a schematic diagram of the initial state of a calf extension and retraction device of the present invention;

[0028] Figure 2 for Figure 1 A partial enlarged view of the middle part;

[0029] Figure 3 It is a schematic diagram of a clamping portion of a calf expansion and contraction device according to the present invention being clamped to a clamping portion;

[0030] Figure 4 for Figure 3 A partial enlarged view of point B in the middle;

[0031] Figure 5 This is a schematic diagram of a calf extension device according to the present invention in a state where the lower calf is extended;

[0032] Figure 6 for Figure 5 A partial enlarged view of point C in the middle;

[0033] Figure 7 This is a schematic diagram of a calf extension device according to the present invention when the lower calf portion stops extending;

[0034] Figure 8 for Figure 7 A partial enlarged view of point D in the middle;

[0035] Figure 9 This is one of the exploded views of a calf extension and retraction device of the present invention;

[0036] Figure 10 for Figure 9 A partial enlarged view of point E in the middle;

[0037] Figure 11 This is the second exploded view of a calf extension and retraction device of the present invention;

[0038] Figure 12 for Figure 11 A partial enlarged view of point F in the middle;

[0039] Figure 13 This is an exploded view of the clamping portion of a calf expansion and contraction device of the present invention;

[0040] Figure 14This is a schematic diagram of force analysis of a calf extension and retraction device according to the present invention when the calf is extended;

[0041] Figure 15 This is a schematic diagram of force analysis of a calf retraction device according to the present invention when the calf is retracted;

[0042] Figure 16 This is a schematic diagram of a massage chair's calf extension and retraction device in a raised state according to the present invention;

[0043] Figure 17 for Figure 16 A partial enlarged view of point H in the middle;

[0044] In the figure, 10, upper calf portion; 101, upper calf fixing frame; 102, top plate; 1021, first slide; 1022, second slide; 103, upper calf massage portion; 20, lower calf portion; 201, lower calf fixing frame; 202, limit baffle; 2021, slot; 203, lower calf massage portion; 30, limit switch; 301, roller; 401, box body; 4011, slider; 402, cover; 403, limit block body; 4031, anti-slip protrusion; 501, first elastic member; 502, second elastic member; 503, third elastic member; 504, fourth elastic member; 601, first guide surface; 602, first locking surface; 701, second guide surface; 702, second locking surface; 80, connecting member; 90, base; 100, back frame; 110, calf push rod; 1101, roller; 120, pushing device. DETAILED DESCRIPTION

[0045] Example 1

[0046] The following combination Figures 1-15 This embodiment will be described in detail.

[0047] A calf expansion and contraction device, comprising:

[0048] Upper calf 10;

[0049] The lower calf portion 20 is slidably adapted to the upper calf portion 10, a first elastic member 501 is provided between the upper calf portion 10 and the lower calf portion 20, and the lower calf portion 20 is provided with a plurality of slots 2021 along its sliding direction; and

[0050] The limit mechanism includes a limit switch 30 and a clamping portion that is transmission-connected to the limit switch 30 . The limit switch 30 and the clamping portion are movably adapted to the upper calf portion 10 . A second elastic member 502 is provided between the clamping portion and the upper calf portion 10 .

[0051] When the limit switch 30 is in the open state due to external force, the limit switch 30 drives the engaging portion to engage with the engaging groove 2021, and when the lower leg portion 20 extends outward, the engaging portion engages with the other engaging groove 2021 from one engaging groove 2021;

[0052] When the external force disappears and the limit switch 30 is in the closed state, the clamping portion disengages from the clamping slot 2021 under the elastic force of the second elastic member 502 and drives the limit switch 30 to return to its initial position, and the lower calf portion 20 returns to its initial position under the elastic force of the first elastic member 501.

[0053] In this embodiment, a plurality of card slots 2021 are added to the pedal spring calf, so that the limiting mechanism is engaged with any card slot 2021 during the extension of the lower calf part 20, so that the pedal spring calf has a position adjustment function, avoiding the user's foot from being continuously subjected to force against the lower calf part 20, thereby improving the user experience; at the same time, compared with the electric telescopic calf, it avoids the need to set up a motor, which saves production costs and the internal space of the calf, making the calf layout more compact and reducing the demand for usage space.

[0054] In this embodiment, the lower calf portion 20 includes a lower calf massage portion 203 and a lower calf fixing frame 201 fixedly connected to the lower calf massage portion 203. The lower calf fixing frame 201 is provided with a limit baffle 202, and the limit baffle 202 is provided with a clamping slot 2021. The upper end surface of each clamping slot 2021 is a first guide surface 601, and the lower end surface of each clamping slot 2021 is a first locking surface 602. Further, when the lower calf portion is placed vertically, as shown in FIG. Figure 2 As shown, the end of the first guide surface 601 close to the limit baffle 202 is lower than the end of the first guide surface 601 away from the limit baffle 202, and the end of the first locking surface 602 close to the limit baffle 202 is not higher than the end of the first locking surface 602 away from the limit baffle 202. Specifically, the first locking surface 602 is a horizontal plane.

[0055] In this embodiment, Figure 13 As shown, the engaging portion includes a box body and a limit block body 403 movably disposed through the box body. The two ends of the second elastic member 502 are respectively connected to the upper calf portion 10 and the box body. A third elastic member 503 is disposed between the limit block body 403 and the box body. The limit block body 403 is engaged with the engaging slot 2021 under the action of the third elastic member 503. The box body includes a box body 401 and a cover 402. The box body 401 is provided with an installation cavity for installing the limit block body 403 and the third elastic member 503. The limit block body 403 is movably disposed through the box body 401, and the cover 402 covers the opening of the installation cavity.

[0056] In this embodiment, the upper end surface of the limit block body 403 near the slot 2021 is provided with a second guide surface 701 adapted to the first guide surface 601, and the lower end surface of the limit block body 403 near the slot 2021 is provided with a second locking surface 702 adapted to the first locking surface 602. Figure 4 As shown, the end of the second guide surface 701 close to the slot 2021 is lower than the end of the second guide surface 701 away from the slot 2021, and the end of the second locking surface 702 close to the slot 2021 is not higher than the end of the second locking surface 702 away from the slot 2021. Specifically, the second locking surface 702 is a horizontal surface. When the lower leg portion 20 extends outward, the first guide surface 601 and the second guide surface 701 abut against each other. The force analysis between the first guide surface and the second guide surface 701 is as follows: Figure 14 As shown, the resultant force is perpendicular to the first guide surface 601 and acts on the limit block body 403, so that the limit block body 403 shrinks into the box body, making it easier for the limit block body 403 to disengage from the card slot 2021, so that the lower calf part 20 continues to extend outward; when the lower calf part 20 stops extending outward, the lower calf frame retracts under the action of the first elastic member 501, so that the first locking surface 602 and the second locking surface 702 abut against each other, and a resultant force perpendicular to the first locking surface 602 and the second locking surface 702 is formed between the first locking surface 602 and the second locking surface 702, as shown Figure 15 As shown, the combined force cannot cause the limit block body 403 to retract into the box body, thereby limiting the lower leg portion 20 from continuing to retract, thereby preventing the user's foot from being continuously stressed.

[0057] In this embodiment, Figure 13 As shown, an anti-slip protrusion 4031 extending radially outward is provided on the outer side of the limit block body 403, and the anti-slip protrusion 4031 is located in the box body. One end of the third elastic member 503 abuts against the anti-slip protrusion 4031, and the other end of the third elastic member 503 abuts against the box body. The anti-slip protrusion 4031 can abut against the inner wall of the box body under the action of the third elastic member 503, preventing the limit block body 403 from detaching from the box body under the action of the third elastic member 503, thereby ensuring the normal operation of the limiting mechanism.

[0058] In this embodiment, Figure 9 As shown, the upper calf part 10 includes an upper calf massage part 103 and an upper calf fixing frame 101 fixedly connected to the upper calf massage part 103. The upper calf fixing frame 101 is provided with a top plate 102. The inner side of the top plate 102, that is, the side facing the limit baffle 202, is provided with a first slide groove 1021 and a second slide groove 1022. The limit switch 30 is slidably adapted to the first slide groove 1021, and the box body is slidably adapted to the second slide groove 1022. Figure 4As shown, the first chute 1021 is arranged along the length of the top plate 102, the second chute 1022 is inclined at an angle to the top plate 102, and the end of the second chute 1022 closer to the top plate 102 is lower than the end of the second chute 1022 farther from the top plate 102. Rollers 301 adapted to fit into the first chute 1021 are provided on both sides of one end of the limit switch 30. The other end of the limit switch 30 passes through the top plate 102. A fourth elastic member 504 is also connected between the limit switch 30 and the top plate 102. When the external force acting on the limit switch 30 disappears, the limit switch 30 is reset to its initial position under the action of the fourth elastic member 504.

[0059] In this embodiment, Figure 13 As shown, a slider 4011 adapted to the second slide groove 1022 is provided on the outside of the box body. Specifically, the slider 4011 is provided on the outside of the box body 401. A connecting member 80 is also included, one end of the connecting member 80 is connected to the limit switch 30, and the other end of the connecting member 80 is connected to the cover 402.

[0060] In this embodiment, the first elastic member 501 and the second elastic member 502 use the fourth elastic member 504 as a tension spring, and the third elastic member 503 is a compression spring.

[0061] Example 2

[0062] The following combination Figure 16-17 This embodiment will be described in detail.

[0063] A massage chair includes a base 90, which is hingedly connected to a back frame 100, and also includes the calf extension and retraction device described above, with the upper calf portion 10 hingedly connected to the back frame 100; and also includes a pushing device 120 and a calf push rod 110. One end of the pushing device 120 is hingedly connected to the base 90, and the other end of the pushing device 120 is hingedly connected to the middle portion of the calf push rod 110. One end of the calf push rod 110 is hingedly connected to the back frame 100, and the other end of the calf push rod 110 is movably abutted against the upper calf portion 10. Furthermore, the other end of the leg push rod is provided with a roller 1101, which rolls against the top plate 102.

[0064] During use, the output end of the pusher 120 extends, driving the calf push rod 110 to rotate clockwise, causing the other end of the calf push rod 110 to push the calf upward around the back frame 100. Simultaneously, the roller 1101 rolls toward the limit switch 30 until it abuts against it, causing it to move along the first slide 1021. The limit switch 30 then drives the box body along the second slide 1022, causing the limit block body 403 to engage with the slot 2021. At this point, the user steps on the lower calf 20, causing it to extend outward. As the lower calf 20 extends, the limit block body 403, under the action of the third elastic member 503, sequentially engages with each slot 2021. When the user stops pedaling, the limit block body 403 is engaged in the current slot 2021, and the first locking surface 602 abuts against the second locking surface 702, preventing the lower calf 20 from retracting under the action of the first elastic member 501 after the user stops pedaling, thereby avoiding continuous force on the user's foot.

[0065] After use, the output end of the pushing device 120 retracts, driving the calf push rod 110 to rotate counterclockwise, and the calf part rotates and descends around the back frame 100, so that the roller 1101 disengages from the limit switch 30, and the box body moves along the second slide groove 1022 in the direction away from the limit baffle 202 under the action of the second elastic member 502, so that the limit block body 403 disengages from the slot 2021 and resets to the initial position. The limit switch 30 is reset to the initial position under the pulling of the box body and the action of the fourth elastic member 504, and the lower calf part 20 is reset to the initial position under the action of the first elastic member 501.

[0066] The above embodiments are intended only to illustrate the technical concepts and features of the present invention. Their purpose is to enable those skilled in the art to understand and implement the present invention. They are not intended to limit the scope of protection of the present invention. Any equivalent changes or modifications based on the spirit of the present invention are intended to be included in the scope of protection of the present invention.

Claims

1. A calf expansion and contraction device, characterized in that: include: Upper calf; a lower calf portion, slidably adapted to the upper calf portion, a first elastic member being provided between the upper calf portion and the lower calf portion, and a plurality of slots being provided on the lower calf portion along its sliding direction; and A limit mechanism includes a limit switch and a clamping portion transmission-connected to the limit switch, wherein the limit switch and the clamping portion are movably adapted to the upper calf portion, and a second elastic member is provided between the clamping portion and the upper calf portion; When the limit switch is in an open state due to an external force, the limit switch drives the clamping portion to be clamped in the clamping slot, and when the lower leg portion extends outward, the clamping portion is disengaged from the clamping slot and clamped in another clamping slot; When the external force disappears and the limit switch is in the closed state, the clamping portion is disengaged from the clamping slot under the elastic force of the second elastic member and drives the limit switch to return to its initial position, and the lower calf portion is reset to its initial position under the elastic force of the first elastic member.

2. A calf expansion and contraction device according to claim 1, characterized in that: The lower calf portion includes a lower calf massage portion and a limit baffle fixedly connected to the lower calf massage portion, the limit baffle is provided with the card slot, the upper end surface of each card slot is a first guide surface, and the lower end surface of each card slot is a first locking surface.

3. A calf expansion and contraction device according to claim 2, characterized in that: The clamping part includes a box body and a limit block body movably arranged through the box body, the two ends of the second elastic member are respectively connected to the upper calf part and the box body, and a third elastic member is provided between the limit block body and the box body. The limit block body is clamped in the clamping slot under the action of the third elastic member.

4. A calf expansion and contraction device according to claim 3, characterized in that: The upper end surface of the limit block body that is clamped to the end of the slot is provided with a second guide surface adapted to the first guide surface, and the lower end surface of the limit block body that is clamped to the end of the slot is provided with a second locking surface adapted to the first locking surface.

5. The calf expansion and contraction device according to claim 4, characterized in that: An anti-slip protrusion extending radially outward is provided on the outer side of the limit block body, and the anti-slip protrusion is located in the box body. One end of the third elastic member abuts against the anti-slip protrusion, and the other end of the third elastic member abuts against the box body. The anti-slip protrusion can abut against the inner wall of the box body under the action of the third elastic member.

6. The calf expansion and contraction device according to claim 3, characterized in that: The upper calf portion includes an upper calf massage portion and a top plate fixedly connected to the upper calf massage portion. A first slide groove and a second slide groove are provided on one side of the top plate. The limit switch is slidably adapted to the first slide groove, and the box body is slidably adapted to the second slide groove.

7. The calf expansion and contraction device according to claim 6, characterized in that: The first slide groove is arranged along the length direction of the top plate, the second slide groove has an inclined angle with the top plate, and an end of the second slide groove close to the top plate is lower than an end of the second slide groove away from the top plate.

8. A calf expansion and contraction device according to claim 6 or 7, characterized in that: Rollers adapted to the first slide groove are provided on both sides of one end of the limit switch, the other end of the limit switch is passed through the top plate, and a fourth elastic member is connected between the limit switch and the top plate; a slider adapted to the second slide groove is provided on the outside of the box body.

9. The calf expansion and contraction device according to claim 8, characterized in that: It also includes a connecting piece, one end of which is connected to the limit switch, and the other end of which is connected to the box body.

10. A massage chair comprising a base, wherein the base is hingedly connected to a back frame, characterized in that: The device further comprises a calf extension and retraction device according to any one of claims 1 to 9, wherein the upper calf portion is hinged to the back frame; and further comprises a pushing device and a calf push rod, wherein one end of the pushing device is hinged to the base, and the other end of the pushing device is hinged to the middle portion of the calf push rod, one end of the calf push rod is hinged to the back frame, and the other end of the calf push rod is movably abutted against the upper calf portion; The pushing device drives the calf push rod to rotate, so that the other end of the calf push rod moves on the upper calf part and pushes or disengages from the limit switch, so that the limit switch is in an open state or a closed state.

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