Switch structure of lifting guardrail needing secondary operation

Abstract

The utility model discloses a switch structure for lifting a guardrail in need of secondary operation, which comprises a switch assembly, the switch assembly is arranged on a connecting seat, two ends of the connecting seat are respectively connected with a lifting assembly and a mounting seat, the switch assembly comprises a swing plate elastically hinged in the connecting seat, one end of the swing plate is a rotatable clamping hook, and the other end of the swing plate is provided with a clamping groove. The clamping hook is arranged outside the connecting base and can be connected with a limiting shaft on the mounting base in a clamped mode, the other end of the swing plate is hinged to a buckling cover through a sliding hole, the buckling cover is arranged outside the connecting base and hinged to the connecting base, and the lifting assembly drives the connecting base to be lifted and then pulls the buckling cover to enable the clamping hook to be disengaged from the limiting shaft. According to the device, the guardrail can be put down only by lifting the switch assembly and then turning over the buckle cover, the buckle cover is independently opened, the clamping hook cannot be separated from the limiting shaft to put down the guardrail, safety is improved, and the situation that the guardrail descends due to the fact that the buckle cover is opened through misoperation can be avoided.

Description

Technical Field

[0001] This utility model relates to the technical field of partial structural improvement design of guardrails, and in particular to a switch structure for raising and lowering guardrails that requires secondary operation. Background Technology

[0002] Nursing beds, divided into electric and manual types, are used by patients with limited mobility during hospitalization or home care. Their main purpose is to facilitate caregivers' work and patient recovery. To prevent patients from falling out of bed, they are equipped with guardrails, either integrated or separate. Most high-end hospital beds on the market are equipped with separate guardrails for added safety during patient care. However, the traditional lifting mechanism of separate guardrails typically allows for easy raising or lowering after a safety switch is activated, with corresponding limit components locking the guardrail in either position. However, there is a possibility that patients or medical staff may accidentally activate the safety switch, causing the guardrail to lower automatically under its own weight, potentially leading to a patient slipping and injury.

[0003] In the prior art, patent CN219813656U discloses a full-coverage lifting guardrail, including an integrated guardrail structure movably connected to fixed crossbeams on both sides of the bed. The guardrail structure is located near the head and foot of the bed on both sides and is movably connected to the fixed crossbeams via a lifting mechanism at the bottom. The lifting mechanism includes a first support shaft seat, a second support shaft seat, a first connecting plate, and a second connecting plate. The first and second support shaft seats are fixed at intervals on the outer side of the fixed crossbeams and form a parallelogram hinge structure with the first and second connecting plates, providing a large extension and tilting stroke. This utility model's full-coverage lifting guardrail uses an integrated guardrail structure, providing all-around protection for the sides of the bed. Furthermore, based on the lifting mechanism, the guardrail is easy to operate, structurally stable and not easily damaged, and effectively saves space during operation.

[0004] Patent CN218338640U discloses a bed rail lifting mechanism, including an inner connecting plate, an outer connecting plate, a fixed base, and an upper connecting base. The inner and outer connecting plates are respectively pivotally connected to the fixed base and the upper connecting base at both ends, forming a parallelogram lifting structure. Side plates are connected to both sides of the inner and outer connecting plates, forming a closed chamber. A latch is pivotally connected to the outer connecting plate within the chamber. One end of the latch is connected to the outer connecting plate with a spring, and the other end is a hook that is locked via the connecting shaft between the inner connecting plate and the fixed base. A handle is passed through the outer connecting plate, with one end of the handle extending into the chamber and abutting against the latch. This invention has advantages such as simple and compact structure, large weight support and lifting range, reduced manufacturing costs, aluminum alloy construction for main components, longer service life, and ease of daily cleaning and maintenance.

[0005] In the above technical solution, the linkage mechanism allows the guardrail to be raised as a whole, but the locking structure design does not have the protection function of secondary switching, which may lead to accidental opening.

[0006] In order to solve one of the above problems, this application provides a switch structure for raising and lowering guardrails that requires secondary operation. Utility Model Content

[0007] The purpose of this utility model is to solve the problems existing in the prior art by proposing a switch structure for raising and lowering guardrails that requires a second operation. The switch assembly must be lifted first and then the cover flipped to complete the action of lowering the guardrail. However, opening the cover alone cannot disengage the hook from the limiting shaft to lower the guardrail, thus improving safety and avoiding the situation where the guardrail is lowered due to accidental opening of the cover.

[0008] To achieve the above objectives, the present invention adopts the following technical solution: a switch structure for lifting guardrails requiring secondary operation, comprising a switch assembly mounted on a connecting base, with the lifting assembly and a mounting base connected to both ends of the connecting base respectively. The switch assembly includes a swing plate elastically hinged inside the connecting base, one end of which is a rotatable hook. The hook is placed outside the connecting base and can engage with a limiting shaft on the mounting base. The other end of the swing plate is hinged to a cover through a sliding hole. The cover is placed outside the connecting base and hinged to the connecting base. After the lifting assembly drives the connecting base to rise, it moves the cover to disengage the hook from the limiting shaft.

[0009] Furthermore, as described above, the middle part of the swing plate is in contact with the connecting seat via a spring.

[0010] Furthermore, as described above, the lower part of the hook is hinged to the second through hole of the connecting seat.

[0011] Furthermore, as described above, the extension of the cover is movably inserted into the sliding hole via a fourth pin.

[0012] Furthermore, as described above, the cover is movably inserted into the first through hole of the connector via the first rod.

[0013] Furthermore, as described above, the connecting seat includes an upper housing and a lower housing that are fixedly connected to each other. The upper housing is provided with a movable hole for the hook to extend and move, and the lower housing is provided with a mounting hole for the cover to flip and move.

[0014] Furthermore, as described above, the lower housing is provided with two first through holes and two second through holes respectively, and the spring is held in place by a protrusion in the middle of the swing plate, with the spring located between the lower housing and the swing plate.

[0015] Furthermore, as described above, a first pin is provided on both sides of one end of the lower housing, and a through second pin hole is provided at the other end of the lower housing. A second pin is inserted into the second pin hole, and a damper is provided at the end of the second pin.

[0016] Furthermore, the lifting assembly described above includes a first fixed rod, a mounting tube, and a bent arm. The first fixed rod is simultaneously hinged to the mounting tube and one end of the bent arm. One end of the mounting tube and both ends of the first fixed rod are fixed to the fence plate. The other end of the mounting tube is hinged to a first pin. The other end of the bent arm is rotatably connected to a mounting base.

[0017] Furthermore, as described above, the mounting base includes a bent mounting plate with a limit shaft fixed on it. The mounting plate has a third through hole and a second fixing rod on both sides. The end of the second pin is placed in the third through hole, and the second fixing rod is hinged to the end of the bent arm. The mounting tube includes a left mounting tube and a right mounting tube located on both sides of the connecting base, and the bent arm includes a left bent arm and a right bent arm located on both sides of the connecting base.

[0018] Compared with the prior art, the beneficial effects of this utility model are: This device is used to assist in the lifting and lowering of guardrails on both sides of a hospital bed. When the guardrail is lowered, the switch assembly needs to be lifted first and then the cover flipped to complete the lowering action. However, opening the cover alone cannot disengage the hook from the limiting shaft to lower the guardrail, thus improving safety and avoiding the situation where the guardrail is lowered due to accidental opening of the cover. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 for Figure 1 The 3D view behind the fence panel is omitted.

[0021] Figure 3 for Figure 2 An explosion diagram;

[0022] Figure 4 for Figure 2 The 3D view of the left mounting tube and the left curved arm is omitted;

[0023] Figure 5 for Figure 2 Side view;

[0024] Figure 6 for Figure 2 Top view;

[0025] Figure 7 for Figure 6 Sectional view along the AA direction.

[0026] In the diagram: 1. Lifting assembly; 10. First fixed rod; 11. Left mounting tube; 12. Right mounting tube; 13. Left curved arm; 14. Right curved arm; 2. Connecting seat; 21. Upper housing; 210. Movable hole; 22. Lower housing; 221. First pin; 222. Second pin hole; 223. First through hole; 224. Mounting hole; 225. Second through hole; 23. Second pin; 24. Damper; 3. Switch assembly; 30. Cover; 31. First rod; 32. Swing plate; 321. Sliding hole; 322. Hook; 33. Spring; 34. Fourth pin; 4. Fence plate; 5. Mounting seat; 50. Limiting shaft; 51. Mounting plate; 52. Third through hole; 53. Second fixed rod. Detailed Implementation

[0027] In the description of this utility model, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0028] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "fixed," "installed," "connected," "set," etc., should be interpreted broadly. For example, when an element is said to be "fixed to" another element, it can be directly on the other element or there may be an intervening element. When an element is said to be "installed" on another element, it can be directly installed on the other element or there may be an intervening element. When an element is said to be "connected" to another element, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within the two elements.

[0029] Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] Example 1

[0032] Reference Figure 1-7 As shown, this utility model discloses a switch structure for a lifting guardrail that requires secondary operation. The switch assembly 3 is mounted on a connecting seat 2. The two ends of the connecting seat 2 are connected to a lifting assembly 1 and a mounting seat 5, respectively. The lifting assembly 1, together with the guardrail panel 4, forms a guardrail, while the mounting seat 5 is fixed to the side of the bed board. The lifting operation of the guardrail can drive the connecting seat 2 to move up and down synchronously. Specifically, the switch assembly 3 includes a swing plate 32 elastically hinged inside the connecting seat 2. One end of the swing plate 32 is a rotatable hook 322, which is located outside the connecting seat 2 and can engage with a limiting shaft 50 on the mounting seat 5. The other end of the swing plate 32 is hinged to a cover 30 through a sliding hole 321. The cover 30 is located outside the connecting seat 2 and hinged to it. After the lifting assembly 1 lifts the connecting seat 2, it moves the cover 30 to disengage the hook 322 from the limiting shaft 50.

[0033] The improvement of this application lies in the structural design that combines the sliding hole 321 on the swing plate 32 with the elastic connecting seat 2, combined with Figure 7 This ensures that if the cover 30 is flipped directly, the connection between the cover 30 and the swing plate 32 (the fourth pin 34) moves into place along the sliding hole 321 before driving the swing plate 32 to rotate. At this time, the rotation amplitude of the hook 322 is small and it cannot directly disengage from the limit shaft 50. Therefore, it can prevent the guardrail from falling under its own weight when the cover 30 is accidentally opened.

[0034] Example 2

[0035] Reference Figure 1-7 As shown, based on the technical solution of Embodiment 1, a switch structure for raising and lowering the guardrail that requires secondary operation is provided, such as... Figure 7 As shown, the middle part of the swing plate 32 contacts the connecting seat 2 via a spring 33. Since the two ends of the swing plate 32 are respectively rotatable hooks 322 and sliding holes 321, and the cover 30 is hinged to the sliding hole 321, the middle part of the swing plate 32, contacting the connecting seat 2 via the spring 33, acts as an elastic fulcrum, buffering the movement transmission at both ends of the swing plate 32. (Refer to...) Figure 3It can be seen that the lower part of the hook 322 is hinged to the second through hole 225 of the connecting seat 2. This is a rotating connection with a hole and shaft, and the second through hole 225 is a round hole. In addition, the extension of the cover 30 is movably inserted into the sliding hole 321 through the fourth pin 34. The sliding hole 321 has a long strip shape in cross-section. The fourth pin 34 and the sliding hole 321 are clearance-fitted, so that the fourth pin 34 can slide along the long strip-shaped path in the sliding hole 321. At the same time, the fourth pin 34 is rotatably set in the sliding hole 321 to transmit the swinging action of the cover 30 to the swinging action of the swing plate 32. Furthermore, the cover 30 is movably inserted into the first through hole 223 of the connecting seat 2 through the first rod 31. The first rod 31 and the first through hole 223 are rotatingly connected with a hole and shaft. The first rod 31 is a cylinder, and the first through hole 223 is a round hole.

[0036] Example 3

[0037] Reference Figure 1-7 As shown, based on the technical solution of the above embodiments, a switch structure for raising and lowering the guardrail that requires secondary operation is provided, such as... Figure 3 As shown, the connecting seat 2 includes an upper housing 21 and a lower housing 22 that are fixedly connected to each other. That is, the upper housing 21 and the lower housing 22 are respectively provided with screw holes and connected by screws. The upper housing 21 is provided with a movable hole 210 for the hook 322 to extend and move, and the lower housing 22 is provided with a mounting hole 224 for the cover 30 to flip and move.

[0038] Furthermore, the lower housing 22 is provided with two first through holes 223 and two second through holes 225 respectively. The middle part of the swing plate 32 is secured to the spring 33 by a protrusion. The spring 33 is located between the lower housing 22 and the swing plate 32, that is, the cover 30 and the swing plate 32 are both installed on the lower housing 22. In addition, a first pin 221 is provided on both sides of one end of the lower housing 22, and a through second pin hole 222 is provided at the other end of the lower housing 22. A second pin 23 is inserted into the second pin hole 222, and a damper 24 is provided at the end of the second pin 23. The damper 24 is a buffer component, which is a conventional component in the prior art. Its structure and function will not be described in detail here.

[0039] like Figure 1-3 As shown, the lifting assembly 1 includes a first fixed rod 10, a mounting tube, and a curved arm. The first fixed rod 10 is hinged to both the mounting tube and one end of the curved arm. One end of the mounting tube and both ends of the first fixed rod 10 are fixed to the fence panel 4. The other end of the mounting tube is hinged to a first pin 221. The other end of the curved arm is rotatably connected to the mounting base 5. Figure 2 and Figure 5It can be seen that the mounting tube, the bent arm, the connecting seat 2, and the mounting seat 5 can form a four-bar linkage, enabling the mounting tube to move up and down.

[0040] Furthermore, refer to Figure 3-4 As shown, the mounting base 5 includes a bent mounting plate 51, a limiting shaft 50 is fixed on the mounting plate 51, and a third through hole 52 and a second fixing rod 53 are respectively provided on both sides of the mounting plate 51. The end of the second pin 23 is placed in the third through hole 52 and the ends of the bent arm are hinged to both ends of the second pin 23. At the same time, the middle part of the second pin 23 is also placed in the second pin hole 222. The second fixing rod 53 is hinged to the end of the bent arm. The mounting tube includes a left mounting tube 11 and a right mounting tube 12 located on both sides of the connecting base 2, and the bent arm includes a left bent arm 13 and a right bent arm 14 located on both sides of the connecting base 2.

[0041] Combination Figure 7 As shown, the working principle of the switch structure of this application is as follows: when the guardrail needs to be lowered, firstly, the guardrail plate 4 needs to be lifted by hand, and then the cover 30 is flipped over with the other hand. The hook 322 automatically disengages from the limiting shaft 50, and the guardrail automatically lowers. Specifically, when the guardrail plate 4 is lifted, the guardrail plate 4 drives the bent arm and the connecting seat 2 to rotate by the second fixed rod 53 and the second pin 23 respectively, driving the mounting tube to move upward. During the upward process, the position of the built-in swing plate 32 of the connecting seat 2 rises, so that there is still a gap between the hook 322 and the limiting shaft 50, and it cannot be directly disengaged. Then, the cover 30 is flipped outward, causing one end of the sliding hole 321 of the swing plate 32 to descend, and the hook 322 releases upward and disengages from the limiting shaft 50. The guardrail descends with its own weight, causing the bent arm and the connecting seat 2 to rotate by the second fixed rod 53 and the second pin 23 respectively. The rotation of the second fixing rod 53 and the second pin 23 causes the mounting tube to move downward to the lower limit position of the mounting seat 5, completing the overall lowering action of the guardrail. Conversely, when the guardrail needs to be raised to the correct position, the fence panel 4 is manually lifted. The fence panel 4 drives the bent arm and the connecting seat 2 to rotate with the second fixing rod 53 and the second pin 23 respectively, causing the mounting tube to rise upward (i.e., the fence panel 4 rises) to complete the raising of the guardrail. The connecting seat 2 rises until the hook 322 resets and hooks the limit shaft 50, and the guardrail rises to the upper limit position of the mounting seat 5, completing the overall raising action of the guardrail.

[0042] In this utility model device, the assembly and fitting relationships of the various components, the hole-shaft fitting accuracy, and the component materials are existing technologies or materials. The relevant technical personnel can directly purchase or order them from the market according to the required product model and specifications.

[0043] The above description is merely a preferred embodiment of this utility model, and common knowledge regarding specific structures and characteristics is not described in detail here. It is obvious to those skilled in the art that this utility model is not limited to the details of the above embodiments, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the protection scope of this utility model.

Claims

1. A switch structure for a lifting guardrail requiring secondary operation, comprising a switch assembly (3), the switch assembly (3) being mounted on a connecting seat (2), the two ends of the connecting seat (2) being connected to a lifting assembly (1) and a mounting seat (5), characterized in that, The switch assembly (3) includes a swing plate (32) that is elastically hinged inside the connecting seat (2). One end of the swing plate (32) is a rotatable hook (322). The hook (322) is placed outside the connecting seat (2) and can engage with the limiting shaft (50) on the mounting seat (5). The other end of the swing plate (32) is hinged to the cover (30) through the sliding hole (321). The cover (30) is placed outside the connecting seat (2) and is hinged to the connecting seat (2). After the lifting assembly (1) drives the connecting seat (2) to rise, it moves the cover (30) to disengage the hook (322) from the limiting shaft (50).

2. The switch structure for raising and lowering a guardrail requiring secondary operation according to claim 1, characterized in that, The middle part of the swing plate (32) is in contact with the connecting seat (2) via a spring (33).

3. A switch structure for raising and lowering a guardrail requiring secondary operation according to claim 1 or 2, characterized in that, The lower part of the hook (322) is hinged to the second through hole (225) of the connecting seat (2).

4. A switch structure for raising and lowering a guardrail requiring secondary operation according to claim 1 or 2, characterized in that, The extension of the cover (30) is movably inserted into the sliding hole (321) via the fourth pin (34).

5. A switch structure for raising and lowering a guardrail requiring secondary operation according to claim 1 or 2, characterized in that, The cover (30) is movably inserted into the first through hole (223) of the connecting seat (2) via the first rod (31).

6. A switch structure for raising and lowering a guardrail requiring secondary operation according to claim 1 or 2, characterized in that, The connecting seat (2) includes an upper housing (21) and a lower housing (22) that are fixedly connected to each other. The upper housing (21) is provided with an active hole (210) for the hook (322) to extend and move, and the lower housing (22) is provided with an installation hole (224) for the cover (30) to flip and move.

7. The switch structure for raising and lowering a guardrail requiring secondary operation according to claim 6, characterized in that, The lower housing (22) is provided with two first through holes (223) and two second through holes (225). The middle part of the swing plate (32) is secured by a protrusion to hold the spring (33). The spring (33) is located between the lower housing (22) and the swing plate (32).

8. The switch structure for raising and lowering a guardrail requiring secondary operation according to claim 7, characterized in that, The lower housing (22) has a first pin (221) on each side of one end, and a through second pin hole (222) at the other end. A second pin (23) is inserted into the second pin hole (222), and a damper (24) is provided at the end of the second pin (23).

9. A switch structure for raising and lowering a guardrail requiring secondary operation according to claim 8, characterized in that, The lifting assembly (1) includes a first fixed rod (10), a mounting tube and a bent arm. The first fixed rod (10) is simultaneously hinged to the mounting tube and one end of the bent arm. One end of the mounting tube and both ends of the first fixed rod (10) are fixed to the fence plate (4). The other end of the mounting tube is hinged to the first pin (221). The other end of the bent arm is rotatably connected to the mounting base (5).

10. A switch structure for raising and lowering a guardrail requiring secondary operation according to claim 9, characterized in that, The mounting base (5) includes a bent mounting plate (51), a limit shaft (50) is fixed on the mounting plate (51), a third through hole (52) and a second fixing rod (53) are respectively provided on both sides of the mounting plate (51), the end of the second pin (23) is placed in the third through hole (52), and the second fixing rod (53) is hinged to the end of the bent arm; the mounting tube includes a left mounting tube (11) and a right mounting tube (12) located on both sides of the connecting base (2), and the bent arm includes a left bent arm (13) and a right bent arm (14) located on both sides of the connecting base (2).

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