Guardrail deflection locking device

Abstract

The utility model discloses a guardrail deflection locking device which is characterized in that a guardrail is installed on a deflection fixing frame through a deflection connecting rod mechanism, the deflection fixing frame is fixedly installed on a bed frame of a medical bed, the deflection connecting rod mechanism comprises an outer connecting rod and an inner connecting rod, and the two ends of the outer connecting rod and the two ends of the inner connecting rod are hinged to the guardrail and the deflection fixing frame respectively. A damping power assisting device for reducing the deflection speed or fixing the deflection position is further arranged between the outer connecting rod or the inner connecting rod and the deflection fixing frame, an installation base is arranged on the inner connecting rod, a locking sliding base is installed on the installation base in a sliding mode, a locking handle is arranged on the locking sliding base, a locking shaft extends out of the locking sliding base, and the guardrail is in a locking state. The locking shaft penetrates through the mounting seat and extends into a locking hole in the deflection fixing frame, a guide structure for guiding the locking shaft to extend into the locking hole is arranged on the deflection fixing frame, and a fixing structure for keeping the locking shaft in an extending state is arranged on the mounting seat; the locking device can rapidly descend and automatically lock the guardrail, the locking efficiency is improved, and a patient is protected.

Description

Technical Field

[0001] This utility model relates to the field of medical care bed manufacturing, and in particular to a guardrail tilt locking device. Background Technology

[0002] Currently, medical devices are developing rapidly. Among them, the demand of medical bed users is not only reflected in the functionality, practicality, and ease of operation, but also in the appearance of the medical bed.

[0003] Modern medical beds must be equipped with guardrails to better protect patients. These guardrails are typically installed on both sides of the bed frame and secured to it using a locking mechanism. However, while ensuring patient safety, the guardrails also need to be easily removable for convenient patient movement. Patent number 202223281090.5 discloses a guardrail assembly for a medical bed. This assembly uses a locking switch to engage a latch into a locking shaft, allowing the guardrail to tilt downwards via a tilting linkage mechanism. However, to tilt the guardrail upwards, the locking switch must be manually held until the latch is facing upwards above the locking shaft for effective locking. This design makes it inconvenient to automatically lock the bed when closed. Utility Model Content

[0004] The technical problem to be solved by this utility model is: a guardrail sway locking device, which can quickly lower and automatically lock the guardrail, improve locking efficiency, and protect patients.

[0005] To solve the above-mentioned technical problems, the technical solution of this utility model is: a guardrail sway locking device, including a guardrail, which is mounted on a sway fixing frame via a sway linkage mechanism. The sway fixing frame is fixedly mounted on the bed frame of a medical bed. The sway linkage mechanism includes an outer link and an inner link, the two ends of which are respectively hinged to the guardrail and the sway fixing frame. The hinge points of the outer link and the inner link on the guardrail and the sway fixing frame are both on the same vertical line. The outer link or the inner link is connected to the sway... The fixed frame is also equipped with a damping assist device to reduce the sway speed or fix the sway position. The inner connecting rod is equipped with a mounting seat, and a locking slide is slidably mounted on the mounting seat. The locking slide is equipped with a locking handle that is easy to pull manually. A locking shaft extends from the locking slide. The guardrail is in a locked state. The locking shaft passes through the mounting seat and extends into the locking hole on the sway fixed frame. The sway fixed frame is equipped with a guide structure to guide the locking shaft into the locking hole. The mounting seat is equipped with a fixing structure to keep the locking shaft in the extended state.

[0006] As a preferred embodiment, the locking handle is fixedly mounted on the locking slide by screws. The mounting base is provided with a corresponding sliding through hole and a guide hole formed after the locking shaft passes through. A sliding bushing that cooperates with the locking shaft is embedded in the guide hole.

[0007] As a preferred embodiment, a fixing sleeve is fixedly installed on the locking slide. The locking slide has an installation groove downstream of the fixing sleeve. A limit nut is embedded in the installation groove. The limit nut is supported by a bottom column through which a locking shaft passes through the bottom of the locking slide. The locking shaft passes through the locking slide, extends into the installation groove, and is threadedly connected to the limit nut. The upstream end of the locking shaft extends into the fixing sleeve.

[0008] As a preferred embodiment, the upper end of the locking slide is provided with a fixing groove for inserting a fixing sleeve, the lower end of the fixing groove is provided with a retaining edge, and the locking slide is provided with a baffle that can be detachably embedded in the fixing groove to restrict the upper end of the fixing sleeve.

[0009] As a preferred embodiment, the fixed sleeve is provided with a receiving hole to accommodate the locking shaft extending to a certain depth.

[0010] As a preferred embodiment, the guide structure includes a guide ramp on the swing bracket, and the locking hole is disposed on the guide ramp.

[0011] As a preferred embodiment, the sway fixing bracket is further provided with a stop to prevent excessive sway from abutting the inner connecting rod, and the locking shaft is inserted into the locking hole, with the axial direction of the locking shaft perpendicular to the tilt direction of the guide slope.

[0012] As a preferred embodiment, the fixing structure includes a compression spring located inside the sliding bushing, a retaining ring is provided upstream of the guide hole of the mounting base, the sliding bushing contacts the retaining ring, one end of the compression spring abuts against the retaining ring, and the other end of the compression spring abuts against the locking shaft.

[0013] As a preferred embodiment, the damping assist device includes a gas spring hydraulic rod, one end of which is hinged to an inner connecting rod, and the other end is hinged to a sway fixing frame; the hinge points of the outer connecting rod at the guardrail and the sway fixing frame are both higher than the hinge points of the inner connecting rod at the guardrail and the sway fixing frame.

[0014] As a preferred embodiment, the mounting base has several notches evenly spaced around the inner circumference of the guide hole.

[0015] After adopting the above technical solution, the effect of this utility model is as follows: The guardrail sway locking device includes a guardrail, which is mounted on a sway fixing frame via a sway linkage mechanism. The sway fixing frame is fixedly installed on the bed frame of the medical bed. The sway linkage mechanism includes an outer connecting rod and an inner connecting rod, with their ends hinged to the guardrail and the sway fixing frame, respectively. The hinge points of the outer and inner connecting rods on the guardrail and the sway fixing frame are both on the same vertical line. A damping assist device is also provided between the outer or inner connecting rod and the sway fixing frame to reduce the sway speed or fix the sway position. A mounting seat is provided on the inner connecting rod, and a locking slide is slidably mounted on the mounting seat. The locking slide has a locking handle for easy manual pulling, and a locking shaft extends from the locking slide. The guardrail is in a locked state. The locking shaft extends through the mounting base into the locking hole on the swing bracket. The swing bracket has a guide structure to guide the locking shaft into the locking hole, and the mounting base has a fixing structure to keep the locking shaft extended. First, by manually pulling the locking handle, the locking shaft retracts and disengages from the locking hole. The guardrail then descends due to gravity, and the damping assist device ensures a uniform descent. Simultaneously, manual assistance is provided to open the guardrail. When locking is required, the guardrail is simply lifted manually. The locking shaft remains extended by the fixing structure. Therefore, when the outer and inner connecting rods swing, the locking shaft always presses against the swing bracket. When the locking hole aligns with the locking shaft, the locking shaft pops out, completing the lock without requiring continuous manual pulling of the locking handle. This locking device enables rapid descent and automatic locking of the guardrail, improving locking efficiency and protecting the patient.

[0016] Furthermore, since the locking handle is fixedly mounted on the locking slide by screws, the mounting base is provided with a corresponding sliding through hole, and the mounting base is provided with a guide hole formed after the locking shaft passes through. A sliding bushing that cooperates with the locking shaft is embedded in the guide hole. The locking slide and the locking handle can slide between the sliding through hole. The guide hole can limit the sliding direction of the locking shaft and provide radial support. The sliding bushing ensures accurate and stable sliding.

[0017] Furthermore, a fixing sleeve is fixedly installed on the locking slide. A mounting groove is provided on the locking slide downstream of the fixing sleeve. A limiting nut is embedded in the mounting groove. The limiting nut is supported by a bottom post through which a locking shaft passes through the bottom of the locking slide. The locking shaft passes through the locking slide, extends into the mounting groove, and is threadedly connected to the limiting nut. The upstream end of the locking shaft extends into the fixing sleeve. By passing through the mounting seat and the bottom post in sequence, the locking shaft can be threadedly connected to the limiting nut, thus achieving radial limiting. At the same time, it will not disengage during axial sliding. Then, the upstream end of the locking shaft can be radially fixed by the fixing sleeve, which can greatly improve the radial load-bearing capacity of the locking shaft, thereby ensuring reliable support when extending into the locking hole.

[0018] Furthermore, the locking slide has a fixed through groove for inserting a fixed sleeve upstream, a retaining edge downstream of the fixed through groove, and a baffle that can be detachably embedded in the fixed through groove to restrict the upstream of the fixed sleeve; thus, installation and disassembly are quick and convenient, while improving the performance of the locking shaft.

[0019] Furthermore, the fixed sleeve is provided with a receiving hole to accommodate the locking shaft to a certain depth; this ensures that the locking slide can drive the locking shaft to retract from the locking hole. At the same time, the locking slide and the locking shaft are not fixedly connected, and the locking shaft can slide inside the fixed sleeve, increasing flexibility and improving the performance.

[0020] Furthermore, since the guide structure includes a guide ramp on the swing fixing frame, and the locking hole is set on the guide ramp; the ramp has a guiding effect on the locking shaft, when the outer connecting rod and the inner connecting rod swing, the guide ramp can automatically squeeze the locking shaft until it corresponds to the locking hole before it extends, thus improving the performance.

[0021] Furthermore, the sway fixing frame is also equipped with a stop to prevent excessive swaying from abutting the inner connecting rod. The locking shaft is inserted into the locking hole, and the axial direction of the locking shaft is perpendicular to the tilting direction of the guide slope. The stop can prevent the guardrail from continuing to rise when the locking shaft is not accurately inserted into the locking hole, thereby improving safety during use. In addition, the locking shaft extending into the locking hole ensures uniform force distribution.

[0022] Furthermore, since the fixing structure includes a compression spring located inside the sliding bushing, a retaining ring is provided upstream of the guide hole of the mounting base, the sliding bushing contacts the retaining ring, one end of the compression spring abuts against the retaining ring, and the other end of the compression spring abuts against the locking shaft; the compression spring can always exert an outward force on the locking shaft, thereby causing the locking shaft to extend, and when the locking handle is manually pulled, the compression spring is compressed, and the locking rod will retract. When the compression spring is released and reset, the locking rod naturally extends. It is simple and reliable to use, and when the locking rod is squeezed by the guide slope, the locking handle will not slide, and the upstream end of the locking rod extends into the fixing sleeve to complete the retraction, further improving the use effect.

[0023] Furthermore, since the damping assist device includes a gas spring hydraulic rod, one end of which is hinged to the inner connecting rod and the other end to the sway fixing frame; the hinge points of the outer connecting rod and the sway fixing frame are both higher than the hinge points of the inner connecting rod; this can greatly reduce the speed of the guardrail when it sways and falls, and also allow the guardrail to be in any position during swaying, improving the flexibility of the guardrail; at the same time, it makes the raising and lowering of the guardrail stable and reliable.

[0024] Furthermore, since the mounting base has several notches evenly distributed around the inner circumference of the guide hole, the contact area with the inner wall of the guide hole of the mounting base can be reduced when the sliding bushing is inserted, thereby facilitating the insertion of the sliding bushing while tightening it securely and improving the performance. Attached Figure Description

[0025] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0026] Figure 1 This is a perspective view of an embodiment of the present utility model;

[0027] Figure 2 This is a structural schematic diagram of an embodiment of the present utility model;

[0028] Figure 3 This is a schematic diagram of the structure of the sliding locking slide and the mounting base in an embodiment of this utility model;

[0029] Figure 4 This is a cross-sectional view of the locking slide and the swing fixing bracket according to an embodiment of the present invention;

[0030] Figure 5 yes Figure 3 A magnified view of a section at point A;

[0031] In the attached diagram: 1. Guardrail; 2. Swing fixing bracket; 3. Outer connecting rod; 4. Inner connecting rod; 5. Mounting base; 6. Locking slide; 7. Locking handle; 8. Locking shaft; 9. Locking hole; 10. Screw; 11. Sliding through hole; 12. Guide hole; 13. Sliding bushing; 14. Fixing sleeve; 15. Mounting groove; 16. Limit nut; 17. Base post; 18. Fixing through groove; 19. Side flange; 20. Baffle; 21. Receiving hole; 22. Guide slope; 23. Stop block; 24. Compression spring; 25. Retaining ring; 26. Gas spring hydraulic rod; 27. Notch. Detailed Implementation

[0032] The present invention will be further described in detail below through specific embodiments.

[0033] like Figures 1 to 5As shown, a guardrail sway locking device includes a guardrail 1, which is mounted on a sway fixing frame 2 via a sway linkage mechanism. The sway fixing frame 2 is fixedly mounted on the bed frame of a medical bed. The sway linkage mechanism includes an outer link 3 and an inner link 4, with their ends hinged to the guardrail 1 and the sway fixing frame 2, respectively. The hinge points of the outer link 3 and the inner link 4 on the guardrail 1 and the sway fixing frame 2 are both on the same vertical line. A damping mechanism is also provided between the outer link 3 or the inner link 4 and the sway fixing frame 2. A damping assist device for yaw speed or fixed yaw position, wherein the inner connecting rod 4 is provided with a mounting base 5, a locking slide 6 is slidably mounted on the mounting base 5, the locking slide 6 is provided with a locking handle 7 for easy manual pulling, a locking shaft 8 extends from the locking slide 6, the guardrail 1 is in a locked state, the locking shaft 8 passes through the mounting base 5 and extends into the locking hole 9 on the yaw fixing frame 2, the yaw fixing frame 2 is provided with a guide structure for guiding the locking shaft 8 into the locking hole 9, and the mounting base 5 is provided with a fixing structure for keeping the locking shaft 8 in the extended state.

[0034] The outer connecting rod 3 consists of two hinged connecting rods, and the inner connecting rod 4 is located between the outer connecting rods 3. It is a plate-shaped structure, and the mounting base 5 is located downstream of the inner connecting rod 4, effectively forming a parallel four-bar linkage mechanism.

[0035] In this embodiment, the locking handle 7 is fixedly mounted on the locking slide 6 by screws 10. The mounting base 5 is provided with a corresponding sliding through hole 11 and a guide hole 12 formed after the locking shaft 8 passes through it. A sliding bushing 13 that cooperates with the locking shaft 8 is embedded in the guide hole 12. The locking slide 6 and the locking handle 7 are clamped on the mounting base 5 through the sliding through hole 11, so that they can be accurately guided by the sliding through hole 11. The guide hole 12 can limit the sliding direction of the locking shaft 8 and provide radial support. The sliding bushing 13 ensures accurate and stable sliding.

[0036] like Figure 3 and Figure 4 As shown, a fixing sleeve 14 is fixedly installed on the locking slide 6. A mounting groove 15 is provided on the locking slide 6 downstream of the fixing sleeve 14. A limiting nut 16 is embedded in the mounting groove 15. The limiting nut 16 is supported by a bottom post 17 through which the locking shaft 8 passes through the bottom of the locking slide 6. The locking shaft 8 passes through the locking slide 6 and extends into the mounting groove 15 to be threadedly connected to the limiting nut 16. The upstream end of the locking shaft 8 extends into the fixing sleeve 14. By passing through the mounting base 5 and the bottom post 17 in sequence, the locking shaft 8 can be threadedly connected to the limiting nut 16, which can limit the movement radially. At the same time, it will not disengage during axial sliding. Then, the upstream end of the locking shaft 8 can be radially fixed by the fixing sleeve 14, which can greatly improve the radial bearing capacity of the locking shaft 8, so that it can reliably support the locking hole 9.

[0037] Furthermore, the upstream of the locking slide 6 is provided with a fixing groove 18 for inserting the fixing sleeve 14, and the downstream of the fixing groove 18 is provided with a retaining edge 19. The locking slide 6 is provided with a baffle 20 that can be detachably embedded in the fixing groove 18 to restrict the upstream of the fixing sleeve 14. When installing, the fixing sleeve 14 is directly inserted into the fixing groove 18 and the lower end is blocked by the retaining edge 19, while the upper end is blocked by the baffle 20, thus restricting the fixing sleeve 14. Conversely, it can be disassembled. Installation and disassembly are quick and convenient, while improving the performance of the locking shaft 8.

[0038] In this embodiment, the fixed sleeve 14 is provided with a receiving hole 21 to accommodate the locking shaft 8 to extend to a certain depth; this ensures that the locking slide 6 can drive the locking shaft 8 to retract from the locking hole 9, and at the same time, the locking slide 6 and the locking shaft 8 are not fixedly connected, and the locking shaft 8 can slide within the fixed sleeve 14, increasing flexibility and improving the use effect.

[0039] like Figure 4 As shown, the guide structure includes a guide slope 22 on the swing fixing frame 2, and the locking hole 9 is provided on the guide slope 22. The slope has a guiding effect on the locking shaft 8. When the outer connecting rod 3 and the inner connecting rod 4 swing, the guide slope 22 can automatically squeeze the locking shaft 8 until it extends out when it corresponds to the locking hole 9, thereby improving the use effect.

[0040] like Figure 2 As shown, the sway fixing frame 2 is also provided with a stop block 23 to prevent excessive swaying from abutting the inner connecting rod 4. The locking shaft 8 is inserted into the locking hole 9, and the axial direction of the locking shaft 8 is perpendicular to the inclination direction of the guide slope 22. The stop block 23 can prevent the guardrail 1 from continuing to rise when the locking shaft 8 is not accurately inserted into the locking hole 9, thereby improving the safety during use. In addition, the locking shaft 8 extends into the locking hole 9 to ensure uniform force distribution.

[0041] Furthermore, the fixing structure includes a compression spring 24 located inside the sliding bushing 13. A retaining ring 25 is provided upstream of the guide hole 12 of the mounting base 5. The sliding bushing 13 contacts the retaining ring 25. One end of the compression spring 24 abuts against the retaining ring 25, and the other end of the compression spring 24 abuts against the locking shaft 8. The compression spring 24 can always exert an outward force on the locking shaft 8, thereby causing the locking shaft 8 to extend. When the locking handle 7 is manually pulled, the compression spring 24 is compressed, and the locking rod will retract. When the compression spring 24 is released and resets, the locking rod naturally extends. It is simple and reliable to use. When the locking rod is squeezed by the guide slope 22, the locking handle 7 will not slide. The upstream end of the locking rod extends into the fixing sleeve 14 and completes the retraction, further improving the use effect.

[0042] like Figure 2As shown, the damping assist device includes a gas spring hydraulic rod 26, one end of which is hinged to the inner connecting rod 4, and the other end is hinged to the sway fixing frame 2. The hinge points of the outer connecting rod 3 on the guardrail 1 and the sway fixing frame 2 are both higher than the hinge points of the inner connecting rod 4 on the guardrail 1 and the sway fixing frame 2. This can greatly reduce the speed of the guardrail 1 when it sways and allows the guardrail 1 to be in any position during swaying, improving the flexibility of the guardrail 1. At the same time, it ensures that the parallel four-bar linkage formed by the outer connecting rod 3 and the inner connecting rod 4 makes the lifting and lowering of the guardrail 1 stable and reliable.

[0043] like Figure 5 As shown, the mounting base 5 has several notches 27 evenly distributed around the inner circumference of the guide hole 12; when the sliding bushing 13 is inserted, the contact area with the inner wall of the guide hole 12 of the mounting base 5 is reduced, so that the sliding bushing 13 can be inserted easily and tightened firmly at the same time, thus improving the performance.

[0044] The working principle of this embodiment is as follows: First, by manually pulling the locking handle 7, the locking slide 6 slides, causing the locking shaft 8 to retract and disengage from the locking hole 9. The guardrail 1 will then descend due to gravity, and the gas spring hydraulic rod 26 will cause the guardrail 1 to descend at a constant speed. At the same time, the person will also assist in holding it to complete the opening of the guardrail 1. When locking is required, the person only needs to lift the guardrail 1. The locking shaft 8 is held in the extended state by the compression spring 24. When the outer connecting rod 3 and the inner connecting rod 4 swing, the locking shaft 8 is always held in the guide slope 22 of the swing fixing bracket 2. When the locking hole 9 coincides with the locking shaft 8, the locking shaft 8 pops out, completing the locking.

[0045] The above-described embodiments are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Any modifications and alterations to the technical solution of the present utility model without departing from its design spirit shall fall within the protection scope defined by the claims of the present utility model.

Claims

1. A guardrail swing lock device, comprising a guardrail, the guardrail is installed on a swing fixing frame through a swing linkage mechanism, the swing fixing frame is fixedly installed on a bed frame of a medical bed, the swing linkage mechanism comprises an outer linkage and an inner linkage, both ends of the outer linkage and the inner linkage are respectively hinged on the guardrail and the swing fixing frame, characterized in that: The hinge points of the outer link and the inner link on the guardrail and the hinge points on the yaw fixing frame are on the same vertical line, and a damping assisting device for slowing down the yaw speed or fixing the yaw position is arranged between the outer link or the inner link and the yaw fixing frame, the inner link is provided with a mounting seat, a locking sliding seat is slidingly arranged on the mounting seat, a locking handle is arranged on the locking sliding seat for facilitating manual pulling, a locking shaft is arranged on the locking sliding seat, the guardrail is in a locking state, the locking shaft penetrates through the mounting seat and extends into a locking hole in the yaw fixing frame, a guide structure is arranged on the yaw fixing frame for guiding the locking shaft to extend into the locking hole, and a fixing structure is arranged on the mounting seat for keeping the locking shaft in an extended state.

2. A barrier deflection locking device as claimed in claim 1, characterised in that: The locking handle is fixedly arranged on the locking sliding seat by screws, the mounting seat is provided with a corresponding sliding through hole, the mounting seat is provided with a guide hole formed after the locking shaft penetrates through the mounting seat, and a sliding shaft sleeve matched with the locking shaft is embedded in the guide hole.

3. A barrier deflection locking device as claimed in claim 2, characterised in that: A fixing sleeve is fixedly arranged on the locking sliding seat, a mounting groove is arranged on the locking sliding seat in a downstream direction of the fixing sleeve, a limiting nut is embedded in the mounting groove, the limiting nut is supported by a bottom column through the locking shaft penetrating through the bottom of the locking sliding seat, the locking shaft penetrates through the locking sliding seat, extends into the mounting groove, and is threadedly connected with the limiting nut, and an upstream end of the locking shaft extends into the fixing sleeve.

4. A barrier deflection locking device as claimed in claim 3, characterised in that: A fixed through groove is arranged on the locking sliding seat and inserted into the fixing sleeve, a stop edge is arranged downstream of the fixed through groove, and a baffle is arranged on the locking sliding seat and detachably embedded in the fixed through groove to limit the upstream of the fixing sleeve.

5. A barrier deflection locking device as claimed in claim 4, characterised in that: The fixing sleeve is provided with an accommodation hole for accommodating the locking shaft to extend to a certain depth.

6. A barrier deflection locking device as claimed in claim 5, characterised in that: The guide structure comprises a guide slope on the yaw fixing frame, and the locking hole is arranged on the guide slope.

7. A barrier deflection locking device as claimed in claim 6, characterised in that: The yaw fixing frame is further provided with a stop block for preventing the yaw from excessively abutting against the inner link, the locking shaft is inserted into the locking hole, and the axial direction of the locking shaft is perpendicular to the inclination direction of the guide slope.

8. A barrier deflection locking device as claimed in claim 7, characterised in that: The fixing structure comprises a compression spring arranged in the sliding shaft sleeve, a stop ring is arranged upstream of the guide hole of the mounting seat, the sliding shaft sleeve is in contact with the stop ring, one end of the compression spring abuts against the stop ring, and the other end of the compression spring abuts against the locking shaft.

9. A barrier deflection locking device as claimed in claim 8, characterised in that: The damping assisting device comprises a gas spring hydraulic rod, one end of the gas spring hydraulic rod is hingedly connected to the inner link, and the other end of the gas spring hydraulic rod is hingedly connected to the yaw fixing frame; the hinge points of the outer link on the guardrail and the yaw fixing frame are higher than the hinge points of the inner link on the guardrail and the yaw fixing frame.

10. A barrier deflection locking device as claimed in claim 9, characterised in that: A plurality of notches are uniformly arranged in the circumference of the guide hole of the mounting seat.

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