Ratchet wheel locking full-protection type guardrail

Abstract

The invention provides a ratchet wheel locking full protection type guardrail which comprises a guardrail body, at least two connecting rod assemblies distributed in the length direction of the side to be protected of a bed body, a locking mechanism and a limiting mechanism, one end of each connecting rod assembly is hinged to the bed body, and the other end of each connecting rod assembly is hinged to the guardrail body; and the locking mechanism is used for locking the guardrail main body at the position. According to the scheme, on one hand, after the locking mechanism is unlocked and before the connecting rod assembly rotates to the free falling state, the limiting mechanism can limit the guardrail body and the connecting rod assembly to continue to rotate relatively, and therefore the guardrail body can be positioned at the first height position to be stored; and on the other hand, when the locking mechanism is locked, the guardrail main body and the connecting rod assembly can be limited to continue to rotate relatively, so that the guardrail main body can be positioned at the second height position when the guardrail main body is unfolded, and the situation that the locking mechanism is unlocked by mistake due to the fact that the guardrail main body continues to move is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of guardrails, and in particular to a ratchet-locked full-protection guardrail. Background Art

[0002] Medical beds currently on the market are generally provided with foldable guardrails to provide protection for patients. For example, the patent with publication number CN102326988A discloses a setting structure of a guardrail on a medical bed, including a bed body, a guardrail arranged on the bed body, a pair of connecting rods arranged between the bed body and the guardrail, one end of each connecting rod is rotatably arranged on the bed body, and the other end is rotatably arranged on the guardrail, and the rotation axis center lines of all the rotatable arrangements are arranged in parallel, and a locking mechanism for positioning the guardrail is arranged on the bed body or the guardrail. However, when the guardrail is in an unlocked state, it is impossible to limit the guardrail from excessive downward movement. Only when the connecting rod is in a free-hanging state (the connecting rod is in a vertical state), the guardrail stops moving downward, and the requirements for the height of the bed body are relatively high. Summary of the invention

[0003] Based on the above-mentioned problems existing in the prior art, the present invention aims to solve the technical problem that when the guardrail on the medical bed in the prior art is in an unlocked state, the guardrail cannot be restricted from moving downward excessively, and the guardrail stops moving downward only when the connecting rod is in a free hanging state, which places high requirements on the height of the bed.

[0004] The present invention provides a ratchet locking full protection guardrail, which can be installed on at least one side of a bed to protect the side of the bed;

[0005] At least two connecting rod assemblies distributed along the length direction of the side of the bed to be protected, one end of the connecting rod assembly is hinged to the bed, and the other end is hinged to the guardrail body;

[0006] A locking mechanism, used to lock the guardrail body at the position when the guardrail body rises to a certain height from the bed surface of the bed body;

[0007] The limiting mechanism is used to limit the guardrail body and the connecting rod assembly from continuing to rotate relative to each other after the locking mechanism is unlocked and before the connecting rod assembly rotates to a free-falling state, and when the locking mechanism is locked, thereby limiting the guardrail body to a corresponding height position.

[0008] According to one embodiment of the present invention, the limiting mechanism includes a special-shaped curved arm fixedly arranged on one end of one of the connecting rod assemblies close to the guardrail body; after the locking mechanism is unlocked, before the connecting rod assembly rotates to a free hanging state, the free end of the special-shaped curved arm can abut against the guardrail body to limit the relative rotation of the guardrail body and the connecting rod assembly, thereby positioning the guardrail body at a first height position.

[0009] According to one embodiment of the present invention, the limiting mechanism also includes a limiting protrusion fixedly arranged on the special-shaped curved arm. When the locking mechanism is locked, the limiting protrusion can abut against the guardrail body to limit the relative rotation of the guardrail body and the connecting rod assembly, thereby positioning the guardrail body at the second height position.

[0010] According to an embodiment of the present invention, the locking mechanism comprises a pawl rotatably arranged on the guardrail body, and the special-shaped curved arm is provided with at least one tooth groove that can engage with the pawl;

[0011] When the pawl and the tooth groove are engaged to lock the locking mechanism, the thrust direction of the special-shaped curved arm on the pawl passes through the rotation center of the pawl.

[0012] According to one embodiment of the present invention, the locking mechanism also includes an elastic member, one end of which is connected to the pawl, and the other end is fixedly connected to the guardrail body; the elastic member is used to support the pawl to rotate in one direction under the toggle of the special-shaped curved arm.

[0013] According to one embodiment of the present invention, the ratchet locking full-protection guardrail also includes an unlocking rod, which includes a handle portion and a connecting portion that are fixedly connected, and the elastic member is a spring. The connecting portion sequentially passes through a part of the guardrail body and the spring and is hinged to the ratchet.

[0014] According to one embodiment of the present invention, the ratchet locking full-protection guardrail also includes a protection box detachably fixed on the guardrail body, the pawl, the tooth groove and the elastic member are all located inside the protection box, and the connecting portion extends into the interior of the protection box and is hinged to the pawl.

[0015] According to one embodiment of the present invention, the connecting rod assembly includes a first connecting rod and a second connecting rod that are fixedly connected, and the ends of the first connecting rod and the second connecting rod that are away from each other are respectively hinged to the bed body and the guardrail body, and the angle between the first connecting rod and the second connecting rod is less than 180°.

[0016] According to an embodiment of the present invention, the angle between the first connecting rod and the second connecting rod is 90°. After the locking mechanism is unlocked, when the limiting mechanism limits the guardrail body to a horizontal state, the length direction of the first connecting rod is along the vertical direction.

[0017] According to one embodiment of the present invention, the ratchet locking full-protection guardrail also includes a linkage rod, and the linkage assembly also includes a third linkage rod fixedly connected to the first linkage rod, and one end of the two third linkage rods away from the corresponding first linkage rods are respectively hinged to the two ends of the linkage rod.

[0018] The beneficial effects of the present invention are:

[0019] In a ratchet locking full-protection guardrail provided by the present invention, the limiting mechanism can, on the one hand, limit the guardrail body and the connecting rod assembly from continuing to rotate relative to each other after the locking mechanism is unlocked and before the connecting rod assembly rotates to a free-hanging state, thereby positioning the guardrail body at a first height position for storage; on the other hand, when the locking mechanism is locked, limit the guardrail body and the connecting rod assembly from continuing to rotate relative to each other, thereby positioning the guardrail body at a second height position when the guardrail body is unfolded, to avoid the guardrail body continuing to move and causing the locking mechanism to be mis-locked. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 is a schematic structural diagram of a ratchet-locked full-protection guardrail provided in an embodiment of the present invention;

[0022] Figure 2 is an exploded view of a ratchet-locked full-protection guardrail provided by an embodiment of the present invention;

[0023] Figure 3 Schematic diagram of the storage state of the ratchet locking full protection type guardrail provided by an embodiment of the present invention;

[0024] Figure 4 It is a schematic diagram of the positional relationship between the special-shaped curved arm and the guardrail body in the storage state of the ratchet-locked full-protection guardrail provided by an embodiment of the present invention;

[0025] Figure 5 is a schematic diagram of the unfolded state of the ratchet-locked full-protection guardrail provided by an embodiment of the present invention;

[0026] Figure 6 Schematic diagram of the positional relationship between the limit protrusion and the guardrail body in the unfolded state of the ratchet-locked full-protection guardrail provided by an embodiment of the present invention;

[0027] Figure 7 2 is a schematic diagram of the structure of a hospital bed formed after a ratchet-locked full-protection guardrail provided by an embodiment of the present invention is installed on a bed body;

[0028] Figure markings: 1000-bed body; 1-guardrail body; 2-connecting rod assembly; 21-first connecting rod; 22-second connecting rod; 23-third connecting rod; 3-locking mechanism; 31-ratchet; 32-elastic member; 4-limiting mechanism; 41-special-shaped bent arm; 410-tooth groove; 42-limiting protrusion; 5-unlocking pull rod; 51-handle part; 52-connecting part; 6-protective box; 7-linkage rod. DETAILED DESCRIPTION

[0029] The following descriptions of the embodiments refer to the attached drawings to illustrate specific embodiments in which the present invention can be implemented.

[0030] The present invention provides a ratchet locking full protection guardrail, which can be installed on at least one side of the bed 1000 to protect the side of the bed 1000; its structure is as follows Figure 1 and Figure 2 As shown, it includes a guardrail body 1, at least two connecting rod assemblies 2 distributed along the length direction of the side to be protected of the bed 1000, a locking mechanism 3 and a limiting mechanism 4, wherein one end of the connecting rod assembly 2 is hinged to the bed 1000, and the other end is hinged to the guardrail body 1; the locking mechanism 3 is used to lock the guardrail body 1 in this position when the guardrail body 1 rises to a certain height from the bed surface of the bed 1000; the limiting mechanism 4 is used to limit the guardrail body 1 and the connecting rod assembly 2 from continuing to rotate relative to each other after the locking mechanism 3 is unlocked and before the connecting rod assembly 2 rotates to a free hanging state, and when the locking mechanism 3 is locked, thereby limiting the guardrail body 1 to a corresponding height position.

[0031] It can be understood that after the locking mechanism 3 is unlocked, the limiting mechanism 4 can limit the continued relative rotation of the guardrail body 1 and the connecting rod assembly 2 before the connecting rod assembly 2 rotates to a free-hanging state, thereby positioning the guardrail body 1 at a first height position for storage, and preventing the guardrail body 1 from moving downward excessively, thereby reducing the height requirement for the bed 1000; and, when the locking mechanism 3 is locked, the limiting mechanism 4 can limit the continued relative rotation of the guardrail body 1 and the connecting rod assembly 2, thereby positioning the guardrail body 1 at a second height position when the guardrail body 1 is unfolded, so as to avoid the guardrail body 1 continuing to move and causing the locking mechanism 3 to be mis-locked.

[0032] like Figure 3 FIG. 4 is a schematic diagram of the storage state of the ratchet locking full-protection guardrail. Specifically, the limiting mechanism 4 includes a special-shaped curved arm 41 fixedly arranged on one end of the connecting rod assembly 2 close to the guardrail body 1; Figure 4 The figure shows the positional relationship between the special-shaped curved arm 41 and the guardrail body 1 in the stowed state of the ratchet-locked full-protection guardrail. After the locking mechanism 3 is unlocked, before the connecting rod assembly 2 rotates to the free-hanging state, the free end of the special-shaped curved arm 41 can abut against the guardrail body 1 to limit the relative rotation of the guardrail body 1 and the connecting rod assembly 2 ( Figure 4 The connecting rod assembly 2 is restricted from rotating in the clockwise direction), so that the guardrail body 1 can be positioned at the first height position.

[0033] like Figure 5 FIG. 4 is a schematic diagram of the unfolded state of the ratchet locking full protection type guardrail. The limiting mechanism 4 also includes a limiting protrusion 42 fixedly arranged on the special-shaped curved arm 41. Figure 6 The figure shows the positional relationship between the limiting protrusion 42 and the guardrail body 1 in the unfolded state of the ratchet locking full protection guardrail. When the locking mechanism 3 is locked, the limiting protrusion 42 can abut against the guardrail body 1 to limit the relative rotation of the guardrail body 1 and the connecting rod assembly 2 ( Figure 6 The connecting rod assembly 2 is restricted from rotating counterclockwise), so that the guardrail body 1 can be positioned at a second height position to prevent the guardrail body 1 from continuing to move upward and causing the locking mechanism 3 to be mislocked.

[0034] In this embodiment, the locking mechanism 3 includes a pawl 31 rotatably disposed on the guardrail body 1, and the special-shaped curved arm 41 is provided with at least one tooth groove 410 that can mesh with the pawl 31;

[0035] When the pawl 31 is meshed with the tooth groove 410 to lock the locking mechanism 3 , the thrust direction of the special-shaped curved arm 41 on the pawl 31 passes through the rotation center of the pawl 31 .

[0036] Furthermore, the locking mechanism 3 further includes an elastic member 32, one end of which is connected to the pawl 31, and the other end is fixedly connected to the guardrail body 1; the elastic member 32 is used to support the pawl 31 to rotate in one direction under the toggle of the special-shaped curved arm 41, specifically, as Figure 4 or Figure 6 As shown, the unidirectional rotation of the pawl 31 refers to clockwise rotation.

[0037] In order to unlock the locking mechanism 3, the ratchet locking full-protection guardrail also includes an unlocking rod 5, which includes a fixedly connected handle portion 51 and a connecting portion 52, the elastic member 32 is a spring, and the connecting portion 52 is hinged to the pawl 31 after passing through a part of the guardrail body 1 and the spring in sequence. Specifically, the handle portion 51 is a handle pull ring.

[0038] It is not difficult to understand that after the pawl 31 is engaged with the tooth groove 410, when the handle portion 51 is pulled upward in the vertical direction to overcome the elastic force of the elastic member 32 and pull the pawl 31 to rotate clockwise, the pawl 31 will be disengaged from the engagement state with the tooth groove 410, thereby achieving the unlocking of the locking mechanism 3.

[0039] Furthermore, in order to hide the related structures of the locking mechanism 3 and the unlocking rod 5 so as to enhance the aesthetic effect of the present solution, the ratchet locking full-protection guardrail also includes a protective box 6 detachably fixed on the guardrail body 1, the pawl 31, the tooth groove 410 and the elastic member 32 are all located inside the protective box 6, and the connecting portion 52 extends into the interior of the protective box 6 and is hinged to the pawl 31.

[0040] It is easy to understand that the protective box 6 can hide the pawl 31, the end of the special-shaped curved arm 41 close to the tooth groove 410, the elastic member 32 and the connecting part 52 therein, thereby improving the aesthetic effect of the present solution, and preventing patients or medical staff from accidentally touching the pawl 31 and the tooth groove 410, thereby improving the safety performance of the present solution.

[0041] In this embodiment, the connecting rod assembly 2 includes a first connecting rod 21 and a second connecting rod 22 that are fixedly connected, and the ends of the first connecting rod 21 and the second connecting rod 22 that are away from each other are respectively hinged to the bed body 1000 and the guardrail body 1, and the angle between the first connecting rod 21 and the second connecting rod 22 is less than 180°. It can be understood that by setting the angle between the first connecting rod 21 and the second connecting rod 22 to be less than 180°, the length of the connecting rod assembly 2 can be reduced, so that when the guardrail body 1 is in the storage state, the space occupied on both sides of the bed body 1000 is reduced, thereby reducing the height requirement for the bed body 1000.

[0042] Preferably, the angle between the first connecting rod 21 and the second connecting rod 22 is 90°. After the locking mechanism 3 is unlocked, when the limiting mechanism 4 limits the guardrail body 1 to a horizontal state, the length direction of the first connecting rod 21 is along the vertical direction.

[0043] like Figure 3The figure shows a schematic diagram of the storage state of the ratchet locking full-protection guardrail. By setting the angle between the first link 21 and the second link 22 of the connecting rod assembly 2 to 90°, the guardrail body 1 can be in the storage state with the first link 21 and the second link 22 respectively attached to the two adjacent side walls of the guardrail body 1 for storage, thereby reducing the space occupied by the guardrail body 1 and the connecting rod assembly 2 on both sides of the bed 1000.

[0044] Furthermore, the ratchet locking full-protection guardrail also includes a linkage rod 7, and the linkage assembly 2 also includes a third linkage rod 23 fixedly connected to the first linkage rod 21, and the ends of the two third linkage rods 23 away from the corresponding first linkage rods 21 are respectively hinged to the two ends of the linkage rod 7.

[0045] Since in the present solution, two connecting rod assemblies 2 are provided along the length direction of the bed body 1000, and since only the connecting rod assembly 2 on the left side is provided with the corresponding locking mechanism 3, when the guardrail body 1 is unfolded and in a locked state, the closer to the locking mechanism 3 in the length direction of the guardrail body 1, the better the pressure-bearing performance of the guardrail body 1 is. By connecting the linkage rod 7 between the third connecting rods 23 of the two connecting rod assemblies 2, the pressure exerted on other positions in the length direction of the guardrail body 1 (different from the positions corresponding to the locking mechanism 3) can be transmitted to the connecting rod assembly 2 on the left side through the linkage rod 7, so that the pressure-bearing performance of the guardrail body 1 in its length direction is consistent.

[0046] In order to facilitate the understanding of this scheme, the following Figure 1-Figure 7 The working principle of the present invention is described in detail:

[0047] The ratchet locking full protection guardrail in this solution is installed on the bed body 1000 of the hospital bed. The structural schematic diagram of the hospital bed after installation is as shown in FIG. Figure 7 shown.

[0048] When the guardrail body 1 needs to be raised to protect the bed 1000, the guardrail body 1 is lifted by hand, during which the special-shaped curved arm 41 rotates counterclockwise around the hinge point of the guardrail body 1 and the connecting rod assembly 2 until the pawl 31 engages with the tooth groove 410 to lock the locking mechanism 3. Figure 6 As shown, after the locking mechanism 3 is locked, the limiting protrusion 42 on the special-shaped curved arm 41 abuts against the guardrail body 1, which can limit the counterclockwise rotation of the connecting rod assembly 2, thereby preventing the guardrail body 1 from continuing to move upward, and the guardrail body 1 is positioned at this height position.

[0049] When the guardrail body 1 needs to be lowered for storage, the handle portion 51 is lifted upward to drive the pawl 31 to rotate clockwise through the connecting portion 52 until the pawl 31 is out of engagement with the tooth groove 410, and then the guardrail body 1 is slowly lowered, during which the special-shaped curved arm 41 rotates clockwise around the hinge point between the guardrail body 1 and the connecting rod assembly 2 until the free end of the special-shaped curved arm 41 abuts against the guardrail body 1. Figure 4 As shown, when the free end of the special-shaped curved arm 41 abuts against the guardrail body 1, the connecting rod assembly 2 can be restricted from rotating clockwise, thereby preventing the guardrail body 1 from continuing to move downward, and the guardrail body 1 is stored at this height position.

[0050] To summarize, in the ratchet locking full-protection guardrail provided by the present invention, the limiting mechanism 4 can, on the one hand, limit the guardrail body 1 and the connecting rod assembly 2 from continuing to rotate relative to each other after the locking mechanism 3 is unlocked and before the connecting rod assembly 2 rotates to a free-hanging state, thereby positioning the guardrail body 1 at a first height position for storage; on the other hand, when the locking mechanism 3 is locked, limit the guardrail body 1 and the connecting rod assembly 2 from continuing to rotate relative to each other, thereby positioning the guardrail body 1 at a second height position when the guardrail body 1 is unfolded, to avoid the guardrail body 1 continuing to move and causing the locking mechanism 3 to be mis-locked.

[0051] It should be noted that although the present invention is disclosed as above by specific embodiments, the above embodiments are not intended to limit the present invention. Ordinary technicians in this field can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be based on the scope defined in the claims.

Claims

1. A ratchet locking full-protection guardrail, which can be installed on at least one side of a bed (1000) to protect the side of the bed (1000); characterized in that: include: Guardrail body (1); At least two connecting rod assemblies (2) distributed along the length direction of the side to be protected of the bed (1000), one end of the connecting rod assembly (2) being hinged to the bed (1000) and the other end being hinged to the guardrail body (1); A locking mechanism (3) is used to lock the guardrail body (1) at the position when the guardrail body (1) rises to a certain height from the bed surface of the bed body (1000); The limiting mechanism (4) is used to limit the guardrail body (1) and the connecting rod assembly (2) from continuing to rotate relative to each other after the locking mechanism (3) is unlocked and before the connecting rod assembly (2) rotates to a free-falling state, and when the locking mechanism (3) is locked, thereby limiting the guardrail body (1) to a corresponding height position.

2. The ratchet locking full protection guardrail according to claim 1, characterized in that: The limiting mechanism (4) comprises a special-shaped curved arm (41) fixedly arranged at one end of one of the connecting rod assemblies (2) close to the guardrail body (1); after the locking mechanism (3) is unlocked, before the connecting rod assembly (2) rotates to a free hanging state, the free end of the special-shaped curved arm (41) can abut against the guardrail body (1) to limit the relative rotation of the guardrail body (1) and the connecting rod assembly (2), thereby positioning the guardrail body (1) at a first height position.

3. The ratchet locking full protection guardrail according to claim 2, characterized in that: The limiting mechanism (4) further comprises a limiting protrusion (42) fixedly arranged on the special-shaped curved arm (41); when the locking mechanism (3) is locked, the limiting protrusion (42) can abut against the guardrail body (1) to limit the relative rotation of the guardrail body (1) and the connecting rod assembly (2), thereby positioning the guardrail body (1) at a second height position.

4. The ratchet locking full protection guardrail according to any one of claims 1 to 3, characterized in that: The locking mechanism (3) comprises a ratchet (31) rotatably arranged on the guardrail body (1), and the special-shaped curved arm (41) is provided with at least one tooth groove (410) that can mesh with the ratchet (31); When the pawl (31) and the tooth groove (410) are engaged to lock the locking mechanism (3), the thrust direction of the special-shaped curved arm (41) on the pawl (31) passes through the rotation center of the pawl (31).

5. The ratchet locking full protection guardrail according to claim 4, characterized in that: The locking mechanism (3) further comprises an elastic member (32), one end of the elastic member (32) being connected to the pawl (31) and the other end being fixedly connected to the guardrail body (1); the elastic member (32) is used to support the pawl (31) to rotate in one direction under the manipulation of the special-shaped curved arm (41).

6. The ratchet locking full protection guardrail according to claim 5, characterized in that: It also includes an unlocking pull rod (5), the unlocking pull rod (5) includes a handle portion (51) and a connecting portion (52) that are fixedly connected, the elastic member (32) is a spring, and the connecting portion (52) sequentially passes through a part of the guardrail body (1) and the spring and is hinged to the pawl (31).

7. The ratchet locking full protection guardrail according to claim 6, characterized in that: It also includes a protective box (6) that is detachably fixed on the guardrail body (1); the ratchet (31), the tooth groove (410) and the elastic member (32) are all located inside the protective box (6); and the connecting portion (52) extends into the interior of the protective box (6) and is hinged to the ratchet (31).

8. The ratchet locking full protection guardrail according to claim 1, characterized in that: The connecting rod assembly (2) comprises a first connecting rod (21) and a second connecting rod (22) which are fixedly connected, and ends of the first connecting rod (21) and the second connecting rod (22) which are away from each other are respectively hinged to the bed body (1000) and the guardrail body (1), and the angle between the first connecting rod (21) and the second connecting rod (22) is less than 180°.

9. The ratchet locking full protection guardrail according to claim 8, characterized in that: The angle between the first connecting rod (21) and the second connecting rod (22) is 90°. After the locking mechanism (3) is unlocked, when the limiting mechanism (4) limits the guardrail body (1) to a horizontal state, the length direction of the first connecting rod (21) is along the vertical direction.

10. The ratchet locking full protection guardrail according to claim 8, characterized in that: It also includes a linkage rod (7), and the linkage assembly (2) also includes a third linkage rod (23) fixedly connected to the first linkage rod (21), and one end of the two third linkage rods (23) away from the corresponding first linkage rod (21) is respectively hinged to the two ends of the linkage rod (7).

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