Locking device and cart

Abstract

The invention relates to the technical field of medical carts, in particular to a locking device and a cart, the cart comprises a cart body, a rotating disc and a rotating shaft arranged on the rotating disc, the rotating shaft is rotatably connected with the cart body, the locking device comprises a connecting assembly, the connecting assembly comprises a clamping part, the clamping part can be rotatably connected with the rotating shaft, the clamping part can be fixedly connected with the cart body, and the rotating shaft is rotatably connected with the rotating shaft; a plurality of clamping positions are arranged on the side wall of the clamping piece at intervals; the locking assembly is arranged on the rotating disc, and the first end of the locking assembly can stretch into the clamping position; one end of the pushing assembly abuts against the second end of the locking assembly, and under the action of external force, the pushing assembly can drive the first end of the locking assembly to move towards the clamping position until the first end of the locking assembly extends into and is fixedly clamped in the clamping position; the locking effect can be guaranteed, and the locking stability of the locking assembly and the locking safety of the rotating disc are also guaranteed; and meanwhile, the locking assembly is prevented from being damaged, so that the replacement cost of the locking assembly can be reduced.

Description

Technical Field

[0001] The present application relates to the technical field of medical carts, and in particular to a locking device and a cart. Background Art

[0002] A medical cart is a device for transporting medical equipment, surgical instruments, medicines, etc. in wards, which can greatly reduce the operating burden of caregivers and enable corresponding operations to be performed on the turntable on the medical cart; the turntable of the existing medical cart can rotate relative to the cart body and be locked in a corresponding position, but the existing locking structure is generally a gear rack, that is, the turntable is locked relative to the cart body through the gear rack, but the locking force of the gear rack is limited. Since the meshing angle is inclined, it is not an absolute lock. When the rotational force is too large, slipping may occur, the locking effect fails, and it will also cause irreversible wear and damage to the structure, reducing the service life of the locking structure. Summary of the invention

[0003] In order to solve the above technical problems, the present application can ensure the locking effect, as well as the locking stability of the locking assembly and the safety of the turntable locking; at the same time, it avoids damage to the locking assembly, thereby reducing the replacement cost of the locking assembly.

[0004] The present application provides a locking device for a cart, the cart comprising a cart body, a turntable and a rotating shaft arranged on the turntable, the rotating shaft being rotatably connected to the cart body, comprising:

[0005] A connecting assembly, comprising a clamping member that can be sleeved on the rotating shaft, the clamping member can be rotatably connected to the rotating shaft, the clamping member can be fixedly connected to the cart body, and a plurality of clamping positions are arranged at intervals on the side wall of the clamping member;

[0006] A locking assembly disposed on the rotating disk, wherein the first end of the locking assembly can extend into the locking position;

[0007] A pushing component, one end of which is in contact with the second end of the locking component. Under the action of an external force, the pushing component can drive the first end of the locking component to move toward the engaging position until the first end of the locking component extends into and is fixedly engaged in the engaging position.

[0008] Furthermore, when the pushing assembly is rotated from the locked position to the unlocked position, the first end of the locking assembly can move away from the engaging position until the first end of the locking assembly is disengaged from the engaging position;

[0009] When the locking assembly is in an unlocked state, there is a gap between the first end of the locking assembly and the engaging position.

[0010] Further, the locking assembly comprises a fixing assembly and a locking member, the fixing assembly is slidably arranged on the rotating disk, and the locking member is convexly arranged on a side of the fixing assembly facing the clamping position;

[0011] Under the action of the pushing assembly, the fixing assembly can drive the locking member to move toward or away from the locking position.

[0012] Further, the locking member is a locking shaft, and the engaging position matched with the locking shaft is a locking hole;

[0013] The axis of the locking shaft can be arranged perpendicular to the axis of the rotating shaft.

[0014] Further, the pushing assembly can rotate relative to the locking assembly, the pushing assembly includes an abutment member and a holding member connected to each other, an abutment portion is provided on the circumference of the abutment member, and the abutment portion can abut against the locking assembly;

[0015] When the locking assembly abuts against the first extreme position of the abutting portion, the locking assembly can be engaged with the engaging position;

[0016] When the locking assembly abuts against the second extreme position of the abutting portion, a gap is provided between the locking assembly and the clamping member.

[0017] Furthermore, it also includes a second limit block, and the second limit block can be fixed relative to the rotating shaft;

[0018] A limiting space is also provided on the peripheral side wall of the abutting member, and the second limiting block is provided in the limiting space. The second limiting block can abut against the limiting space to limit the rotation angle of the abutting portion.

[0019] Further, the fixing assembly includes a first fixing member, a second fixing member and a first elastic member sleeved on the locking member;

[0020] The first elastic member is arranged between the first fixing member and the second fixing member, and the first elastic member is in a first compressed state;

[0021] The locking member can abut against the side wall of the connecting assembly, and under the action of the side wall of the connecting assembly, the locking member can move toward the pushing assembly, and the first elastic member is in a second compressed state; wherein the compression degree of the second compressed state is greater than the compression degree of the first compressed state;

[0022] Under the action of the pushing assembly and the first elastic member, the locking member can extend into the locking position.

[0023] Furthermore, the first fixing member and the second fixing member are both provided with a first through hole, and the locking member passes through the first through hole on the first fixing member and the first through hole on the second fixing member in sequence;

[0024] Under the action of external force, the locking member can move relative to the first fixing member and the second fixing member.

[0025] Furthermore, the fixing assembly further comprises a slide rail structure, and the slide rail structure can be slidably connected with the rotating disk;

[0026] The first fixing member and the second fixing member are both fixedly connected to the slide rail structure.

[0027] Furthermore, it further comprises a first limiting block, the first limiting block can be fixed relative to the rotating shaft, a first end of the first limiting block is provided with a receiving hole, and one end of the locking member can be received in the receiving hole;

[0028] The fixing assembly further comprises a third fixing member and a second elastic member, and the third fixing member is fixedly connected to the slide rail structure;

[0029] The second end of the first limit block abuts against the first end of the second elastic member, the second end of the second elastic member abuts against the first end of the third fixing member, and the second end of the third fixing member abuts against the pushing assembly;

[0030] During the process of the abutment position between the abutment portion and the third fixing member rotating from the second extreme position to the first extreme position, the locking assembly moves toward the connecting assembly, and the distance between the third fixing member and the first limit block gradually decreases until the locking member is engaged and fixed with the engaging position.

[0031] Furthermore, the axis of the accommodating hole, the axis of the first through hole and the axis of the locking member coincide with each other.

[0032] The present invention also protects a cart, comprising a cart body, a turntable, a rotating shaft arranged on the turntable and the locking device as described above;

[0033] The clamping member is fixedly connected to the cart body, and the turntable is rotatably connected to the cart body via the rotating shaft.

[0034] Implementing the embodiments of the present application has the following beneficial effects:

[0035] The locking assembly in the present application can be extended into the engaging position and engaged and fixed therewith under the push of the pushing assembly, so that only when the locking assembly is extended into the engaging position can the locking assembly and the engaging position cooperate to achieve the effect of engaging and fixing, and can avoid engaging and fixing the locking assembly before the locking assembly enters the engaging position, thereby avoiding locking slippage or failure due to insufficient locking force in the locked state, or locking failure due to long-term use, thereby ensuring the locking effect, and also ensuring the locking stability of the locking assembly and the safety of the turntable locking; at the same time, avoiding damage to the locking assembly, thereby reducing the replacement cost of the locking assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solution of the present application, the following is a brief introduction to the drawings required for use in the embodiments or prior art descriptions. Obviously, the drawings described below are only some embodiments of the present application, and a person of ordinary skill in the art can obtain other drawings based on these drawings without creative work.

[0037] Figure 1 This is a structural diagram of the locking device of this embodiment after being connected to the rotating disk;

[0038] Figure 2 for Figure 1 sectional view of;

[0039] Figure 3 This is a structural diagram of the locking assembly and the pushing assembly of this embodiment after being connected;

[0040] Figure 4 is a structural diagram of the clamping member described in this embodiment;

[0041] Figure 5 2 is a structural diagram of the cart described in this embodiment.

[0042] Among them, the reference numerals in the figure correspond to:

[0043] 1-turntable; 2-trolley body; 3-locking assembly; 4-pushing assembly; 5-clamping member; 11-rotating shaft; 12-first limiting block; 13-second limiting block; 31-first fixing member; 32-second fixing member; 33-first elastic member; 34-locking member; 35-slide rail structure; 36-third fixing member; 37-second elastic member; 41-abutting member; 42-gripping member; 51-locking hole; 411-abutting portion. DETAILED DESCRIPTION

[0044] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0045] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0046] See attached Figure 1-5 The present embodiment provides a locking device for a cart, which includes a cart body 2, a turntable 1 and a rotating shaft 11 arranged on the turntable 1, the rotating shaft 11 is rotatably connected to the cart body 2, and includes: a connecting component, including a clamping member 5 that can be sleeved on the rotating shaft 11, the clamping member 5 can be rotatably connected to the rotating shaft 11, the clamping member 5 can be fixedly connected to the cart body 2, and a plurality of clamping positions are arranged at intervals on the side wall of the clamping member 5; a locking component 3 arranged on the turntable 1, the first end of the locking component 3 can extend into the clamping position; a pushing component 4, one end of the pushing component 4 abuts against the second end of the locking component 3, and under the action of external force, the pushing component 4 can drive the first end of the locking component 3 to move toward the clamping position until the first end of the locking component 3 extends into and is fixedly clamped in the clamping position.

[0047] In this embodiment, the locking device is mainly used in a medical cart. The locking device is used to lock the turntable 1. When the turntable 1 is rotated to the angle required by the user, the turntable 1 is locked relative to the cart body 2 through the locking device.

[0048] The locking device in this embodiment is arranged on the turntable 1, that is, the snap-fit ​​member 5 of the connecting assembly is sleeved on the rotating shaft 11 of the turntable 1, the locking assembly 3 and the pushing assembly 4 are both arranged on the turntable 1, and the locking assembly 3 is arranged between the pushing assembly 4 and the snap-fit ​​member 5, and the two ends of the locking assembly 3 can respectively abut against the pushing assembly 4 and the snap-fit ​​member 5, so as to realize the linkage operation of the pushing assembly 4, the locking assembly 3 and the snap-fit ​​member 5.

[0049] It should be noted that: in the present embodiment, the locking assembly 3 can be pushed into the locking position and fixed with the locking position under the push of the pushing assembly 4, so that only when the locking assembly 3 is extended into the locking position, the locking assembly 3 and the locking position can cooperate to achieve the effect of locking and fixing, which can avoid the locking assembly 3 being fixed before entering the locking position, thereby avoiding locking slippage or failure due to insufficient locking force in the locked state, or locking failure due to long-term use, thereby ensuring the locking effect, and also ensuring the locking stability of the locking assembly 3 and the safety of the locking of the turntable 1; at the same time, avoiding damage to the locking assembly 3, thereby reducing the replacement cost of the locking assembly 3.

[0050] See attached Figure 4 The clamping member 5 is a ring-shaped structure, and a plurality of clamping positions are evenly spaced on the side wall of the clamping member 5. The intervals between adjacent clamping positions are set according to actual conditions. By setting a plurality of clamping positions, the turntable 1 can be unlocked or locked at any position relative to the cart body 1, thereby increasing the working range of the turntable 1 and improving the user experience.

[0051] In this embodiment, the shape of the engaging position is not limited, and the shape of the engaging position may be a round hole structure, a square hole structure, an elliptical hole structure, or the like.

[0052] Preferably, the snap-fitting positions have a circular hole structure, and the intervals between adjacent snap-fitting positions are smaller than the radius of the circular hole structure, so that the adjustable range of the turntable 1 can be expanded. When the turntable 1 rotates a small angle, the locking assembly 3 can be snap-fitted and fixed with the snap-fitting positions to achieve a locking effect.

[0053] In this embodiment, the number and size of the clamping parts 5 are not limited, as long as the clamping parts 5 can be sleeved on the rotating shaft 11 , and the number of the clamping parts 5 is set according to actual conditions.

[0054] In this embodiment, the number of locking assemblies 3 is not limited, as long as the clamping members 5 and the locking assemblies 3 are arranged in a one-to-one correspondence.

[0055] In this embodiment, the locking device includes a locking assembly 3 and a clamping member 5 .

[0056] In some other possible embodiments, the locking device includes two locking assemblies 3 and two clips 5, each clip 5 is provided with a locking assembly 3 corresponding thereto, the two clips 5 are both mounted on the rotating shaft 11, and the two clips 5 are spaced apart. By providing two locking assemblies 3 and two clips 5, when one locking assembly 3 and the corresponding clip 5 are damaged, the other locking assembly 3 and the corresponding clip 5 can still be locked, thereby ensuring the stability of locking through redundant settings.

[0057] In other possible embodiments, the locking device includes three locking components 3 and three clamping members 5 , each clamping member 5 is provided with a corresponding locking component 3 , and the three clamping members 5 are sleeved on the rotating shaft 11 at intervals.

[0058] In some possible embodiments, when the pushing component 4 is rotated from the locked position to the unlocked position, the first end of the locking component 3 can move away from the locking position until the first end of the locking component 3 is disengaged from the locking position; when the locking component 3 is in the unlocked state, there is a gap between the first end of the locking component 3 and the locking position. When the locking component 3 is in the unlocked state, a gap is set between the first end of the locking component 3 and the locking position, which can prevent the locking component 3 from interfering with the rotation of the locking component 5, thereby ensuring the smoothness of the rotation of the turntable 1 relative to the cart body 2, and increasing the rotation rate, thereby improving the user experience.

[0059] In this embodiment, when the pushing assembly 4 is in the locking position, the first end of the locking assembly 3 abuts against the side wall of the clamping member 5, or the first end of the locking assembly 3 is clamped and fixed to the clamping position.

[0060] See attached Figure 2 The locking assembly 3 includes a fixing assembly and a locking piece 34, the fixing assembly is slidably arranged on the turntable 1, and the locking piece 34 is convexly arranged on the side of the fixing assembly facing the engaging position; under the action of the pushing assembly 4, the fixing assembly can drive the locking piece 34 to move toward or away from the engaging position, and by arranging the fixing assembly and the locking piece 34 that cooperate with each other, the locking piece 34 can be convexly arranged on the side of the fixing assembly facing the engaging position, thereby ensuring that the locking piece 34 can extend into the engaging position and be engaged and fixed with the engaging position, thereby ensuring the locking effect of the locking piece 34 and the engaging position and avoiding locking failure.

[0061] In this embodiment, the attached Figure 2 The locking member 34 in the trolley extends into the engaging position, the locking device is in a locked state, and the turntable 1 is fixed relative to the trolley body 2.

[0062] In this embodiment, the structure of the locking member 34 is not limited, and the structure of the engaging position is not limited. It is sufficient to ensure that the locking member 34 can extend into the engaging position to achieve engaging engagement between the locking member 34 and the engaging position.

[0063] In some possible embodiments, the locking member 34 is a locking shaft, and the locking position matching the locking shaft is a locking hole 51; the axis of the locking shaft can be set perpendicular to the axis of the rotating shaft 11. By setting the locking member 34 as the locking shaft and setting the locking position as the locking hole 51, the locking structure can be simplified, the locking failure of the locking member 34 and the locking position can be avoided, and the locking ability of the locking member 34 and the locking position can be ensured.

[0064] In this embodiment, the axis of the locking shaft is arranged to coincide with the axis of the locking hole 51 .

[0065] In this embodiment, the length and diameter of the locking shaft are set according to actual conditions.

[0066] In this embodiment, the pushing component 4 can rotate relative to the turntable 1, or move relative to the turntable 1; when the pushing component 4 rotates relative to the turntable 1, the abutment position of the pushing component 4 and the locking component 3 is a cam-like structure to achieve unlocking or locking; when the pushing component 4 moves relative to the turntable 1, the pushing component 4 moves toward or away from the engaging position, thereby driving the locking component 3 to move toward or away.

[0067] In some possible embodiments, the pushing assembly 4 can rotate relative to the locking assembly 3, and the pushing assembly 4 includes an abutting member 41 and a holding member 42 that are connected to each other. An abutting portion 411 is provided on the circumferential side of the abutting member 41, and the abutting portion 411 can abut against the locking assembly 3; when the locking assembly 3 abuts against the abutting portion 411 at a first extreme position, the locking assembly 3 can be engaged with the engaging position; when the locking assembly 3 abuts against the abutting portion 411 at a second extreme position, there is a gap between the locking assembly 3 and the engaging member 5, and by providing the abutting member 41 and the holding member 42 that are connected to each other, the locking assembly 3 and the holding member 5 can be engaged with each other. 42, which can ensure that the holding member 42 can drive the abutment member 41 to rotate back and forth. During the rotation of the abutment member 41, the first extreme position, the second extreme position and the position between the first extreme position and the second extreme position of the abutment portion 411 can abut against the locking component 3. By changing the abutment with the abutment portion 411, the locking component 3 can be locked with the engaging position or the locking component 3 can be disengaged from the engaging position. It can be seen that the locking component 3 can be locked or unlocked with the engaging position by rotating the holding member 42, thereby simplifying the operation process and improving the operation efficiency.

[0068] In this embodiment, the abutment member 41 and the holding member 42 are fixedly connected, the abutment member 41 has a rotating shaft, a mounting hole is provided on the turntable 1, the rotating shaft is arranged in the mounting hole, the abutment member 41 and the holding member 42 can rotate around the axis of the rotating shaft, and the axis of the rotating shaft is arranged to coincide with the axis of the mounting hole.

[0069] In this embodiment, the abutment 41 is a cam-like structure, the distance between the first extreme position of the abutment 411 and the locking position is a first distance, the distance between the second extreme position of the abutment 411 and the locking position is a second distance, and the first distance is greater than the second distance, so that the locking assembly 3 can be driven to move between the locking position and the unlocking position, and the abutment 41, the locking assembly 3 and the locking member 5 cooperate with each other to realize right-angle driving operation, the cam-like structure saves labor, realizes the locking function in a smaller space, optimizes the overall structure of the locking device, and reduces the preparation cost.

[0070] In some possible embodiments, a second limit block 13 is further included, and the second limit block 13 can be fixed relative to the rotating shaft 11; a limited space is also arranged on the peripheral side wall of the abutment 41, and the second limit block 13 is arranged in the limited space. The second limit block 13 can abut against the limited space to limit the rotation angle of the abutment 411. By setting the second limit block 13, the rotation angle of the abutment 411 can be limited, and the first limit position, the second limit position and the range between the first limit position and the second limit position of the abutment 411 can be controlled to abut against the locking assembly 3. Within this rotation range, the locking assembly 3 can be engaged and disengaged with the engaging position, thereby shortening the rotation path of the abutment 41 and improving the locking and unlocking efficiency while ensuring the locking cooperation. At the same time, by setting the second limit block 13, the abutment 41 can be limited to prevent it from rotating, which causes the locking or unlocking to fail.

[0071] In this embodiment, the second limit block 13 is fixedly connected to the turntable 1. Preferably, the second limit block 13 is integrally formed with the turntable 1.

[0072] See also Figure 3 A limited space and an abutment portion 411 are provided on the peripheral side wall of the abutment member 41, and the limited space has two relatively arranged limited surfaces. During the rotation of the second limit block 13 in the limited space, the second limit block 13 can abut against the two relatively arranged limited surfaces to limit the rotation angle of the abutment member 41 around the axis of the rotation shaft; when the second limit block 13 abuts against the first limit surface, the first limit position of the abutment portion 411 rotates to abut against the locking assembly 3, and when the second limit block 13 abuts against the second limit surface, the second limit position of the abutment portion 411 rotates to abut against the locking assembly 3.

[0073] In this embodiment, the specific shapes of the limit block 13, the limit space and the abutment portion 411 are not set, as long as the limit block 13, the limit space and the abutment portion 411 cooperate with each other to drive the locking assembly 3 to move toward the locking position.

[0074] In this embodiment, the limiting space and the abutting portion 411 are arranged opposite to each other, and there is a gap between the limiting space and the abutting portion 411 .

[0075] See attached Figure 2The fixing assembly includes a first fixing member 31, a second fixing member 32 and a first elastic member 33 sleeved on the locking member 34; the first elastic member 33 is arranged between the first fixing member 31 and the second fixing member 32, and the first elastic member 33 is in a first compression state; the locking member 34 can abut against the side wall of the connecting assembly, and under the action of the side wall of the connecting assembly, the locking member 34 can move toward the pushing assembly 4, and the first elastic member 33 is in a second compression state; wherein the compression degree of the second compression state is greater than the compression degree of the first compression state; under the action of the pushing assembly 4 and the first elastic member 33 When in use, the locking member 34 can extend into the engaging position. By arranging the first fixing member 31, the second fixing member 32 and the first elastic member 33 that cooperate with each other, it can be ensured that the first elastic member 33 arranged between the first fixing member 31 and the second fixing member 32 is in a compressed state. In this way, it can be ensured that the first elastic member 33 provides the locking member 34 with an elastic force toward the engaging position, thereby ensuring that the locking member 34 can be engaged in the engaging position and preventing the locking member 34 from moving out of the engaging position due to external force, thereby ensuring the stability of the engagement between the locking member 34 and the engaging position, and further ensuring the safety of the locking of the turntable 1.

[0076] More importantly, by arranging the first elastic member 33 between the first fixing member 31 and the second fixing member 32, when the protruding locking member 34 abuts against the side wall of the connecting component, the locking member 34 can move away from the locking position and compress the first elastic member 33. The first elastic member 33 accumulates elastic force. When the connecting component is rotated to its locking position corresponding to the locking member 34, the elastic force accumulated by the first elastic member 33 drives the locking member 34 to move toward the locking position, thereby realizing the locking and fixing, and improving the locking speed and the locking effect.

[0077] In this embodiment, the first fixing member 31 and the second fixing member 32 are relatively fixed, and a receiving space is formed between the first fixing member 31 and the second fixing member 32 . The receiving space is used to receive the first elastic member 33 .

[0078] In this embodiment, a limiting step is provided on the locking member 32 , the limiting step is provided in the above-mentioned accommodation space, and one end of the first elastic member 33 abuts against the second fixing member 32 , and the other end of the first elastic member 33 abuts against the limiting step.

[0079] In some possible embodiments, the first fixing member 31 and the second fixing member 32 are both provided with a first through hole, and the locking member 34 passes through the first through hole on the first fixing member 31 and the first through hole on the second fixing member 32 in sequence; under the action of external force, the locking member 34 can move relative to the first fixing member 31 and the second fixing member 32. By providing the first through hole and the second through hole, it is possible to ensure that the locking member 34 moves relative to the first fixing member 31 and the second fixing member 32, and to ensure that the locking member 34 coincides with the axial direction of the locking member in the locked state in the moving direction, thereby ensuring the accuracy of the locking of the locking member 34 and avoiding the angular deviation of the locking member 34 during the movement, which causes the locking member 34 to be unable to engage with the engaging position. It can be seen that by providing the first through hole and the second through hole, the stability of the operation of the locking member 34 can be ensured, and the locking effect of the locking member 34 and the engaging position can be ensured.

[0080] In this embodiment, the second fixing member 32 is formed by at least two fixing members that are detachably buckled together, and the two fixing members are buckled together to form a first through hole; the diameter of the first elastic member 33 is larger than the diameter of the first through hole, and the diameter of the limiting step is larger than the diameter of the first through hole;

[0081] The installation process of the locking member 34 is as follows: the first elastic member 33 is sleeved on the locking member 34, and one end thereof is abutted against the limiting step, one end of the locking member 34 is passed through the first through hole of the first fixing member 31, part of the locking member 34 is placed on a fixing member, the two fixing members are buckled, and the other end of the first elastic member 33 is abutted against the second fixing member 32, so that the locking member 34 is fixed to the fixing assembly.

[0082] In this embodiment, when the locking member 34 rotates to abut against the side wall of the locking member 5, the locking member 34 has not yet engaged with the engaging position, and there is a gap between the locking member 34 and the engaging position. At this time, the locking member 34 moves toward the pushing assembly 4, and the first elastic member 33 is compressed; the turntable 1 is rotated at a small angle, and under the action of the elastic force of the compressed first elastic member 33, the first elastic member 33 drives the locking member 34 to move toward the engaging position.

[0083] In some possible embodiments, the fixing assembly also includes a slide rail structure 35, which can be slidably connected to the turntable 1; the first fixing member 31 and the second fixing member 32 are both fixedly connected to the slide rail structure 35. By setting the slide rail structure 35, the locking assembly 3 as a whole can be slidably connected relative to the turntable 1, thereby ensuring the stability of the operation of the locking assembly 3 and preventing the locking assembly 3 from falling off the turntable 1, thereby ensuring the installation stability of the locking assembly 3.

[0084] In this embodiment, the length direction of the slide rail structure 35 is arranged parallel to the axial direction of the locking member 34. The number of the slide rail structures 35 is not limited, and the number of the slide rail structures 35 can be one or two relatively arranged.

[0085] Preferably, the slide rail structures 35 are arranged relatively to each other, the first fixing member 31 , the second fixing member 32 and the third fixing member 36 are all fixedly arranged between the two slide rail structures 35 , and the slide rail structure 35 is slidably connected to the turntable 1 .

[0086] In some possible embodiments, it also includes a first limit block 12, the first limit block 12 can be fixed relative to the rotating shaft 11, the first end of the first limit block 12 is provided with a receiving hole, and one end of the locking member 34 can be received in the receiving hole; the fixing assembly also includes a third fixing member 36 and a second elastic member 37, the third fixing member 36 is fixedly connected to the slide rail structure 35; the second end of the first limit block 12 abuts against the first end of the second elastic member 37, the second end of the second elastic member 37 abuts against the first end of the third fixing member 36, and the second end of the third fixing member 36 abuts against the pushing assembly 4; during the process of the abutting position of the abutting portion 411 and the third fixing member 36 rotating from the second limit position to the first limit position, the locking assembly 3 moves toward the connecting assembly, and the third fixing member 36 abuts against the third elastic member 37 The distance between the first and second limit blocks 12 gradually decreases until the locking member 34 is locked and fixed with the engaging position. By providing the first accommodating hole, the movement range of the locking member 34 can be expanded, and the locking member 34 can be prevented from angularly deviating during movement, which would cause the locking member 34 to be unable to engage with the engaging position. That is, by providing the accommodating hole, the stability of the operation of the locking member 34 can be further guaranteed, and the locking effect of the locking member 34 with the engaging position can be guaranteed; at the same time, by providing the second elastic member 37 between the third fixing member 36 and the first limit block 12, the second elastic member 37 can drive the third fixing member 36 to move toward the side away from the engaging position, thereby driving the locking member 34 to move away from the engaging position, achieving the effect of unlocking and resetting, thereby simplifying the reset structure and improving the reset rate.

[0087] In this embodiment, the first limit block 12 can be fixedly connected relative to the turntable 1 , and preferably the first limit block 12 and the turntable 1 are integrally formed.

[0088] In this embodiment, when the pushing component 4 rotates toward the locking position, the pushing component 4 pushes the third fixing member 36 to move toward the first limit block 12, and the distance between the third fixing member 36 and the first limit block 12 is reduced, and the second elastic member 37 arranged between the third fixing member 36 and the first limit block 12 is compressed; when the pushing component 4 rotates to the unlocking position, the pushing component 4 does not generate a thrust on the third fixing member 36. Under the action of the elastic force of the compressed second elastic member 37, the third fixing member 36 moves toward the side away from the locking position, and drives the slide rail structure 35 fixedly connected to it to move toward the side away from the locking position, thereby realizing the unlocking and resetting of the locking member 34.

[0089] In this embodiment, the first elastic member 33 and the second elastic member 37 are both springs.

[0090] In some possible embodiments, the axis of the accommodating hole, the axis of the first through hole and the axis of the locking member 34 coincide with each other. The above arrangement can ensure that the locking member 34 will not undergo angular displacement during movement, thereby ensuring the stability of the operation of the locking member 34 and the locking effect of the locking member 34 and the locking position.

[0091] The present invention also protects a cart, including a cart body 2, a turntable 1, a rotating shaft 11 arranged on the turntable 1 and a locking device as described above; the clamping member 5 is fixedly connected to the cart body 2, and the turntable 1 is rotatably connected to the cart body 2 via the rotating shaft 11.

[0092] It should be noted that the cart in the present embodiment has the locking device as above, which can achieve the effect of snap-fitting and fixing only when the locking assembly 3 is extended into the snap-fitting position, and can avoid the snap-fitting and fixing of the locking assembly 3 before it enters the snap-fitting position, thereby avoiding the locking slipping or failure due to insufficient locking force in the locked state, or locking failure due to long-term use, thereby ensuring the locking effect, and also ensuring the locking stability of the locking assembly 3 and the safety of the locking of the turntable 1; at the same time, avoiding damage to the locking assembly 3, thereby reducing the replacement cost of the cart.

[0093] In this embodiment, an installation space is provided on the turntable 1, and a slider or a slide rail corresponding to the slide rail structure 35 is provided on the side wall of the installation space. The abutment 41, the locking assembly 3 and the clamping member 5 are accommodated in the installation space, and the locking assembly 3 is slidably connected to the side wall of the installation space.

[0094] In this embodiment, a sealing cover is detachably provided above the installation space, and the sealing cover is used to seal the installation space.

[0095] The process of rotating the turntable 1 relative to the cart body 2: when the user needs to change the rotation angle of the turntable 1 relative to the cart body 2, the user rotates the grip 42 until the position where the abutting portion 411 abuts against the locking assembly 3 is rotated from the first extreme position to the second extreme position, and the locking assembly 3 moves away from the locking position. At this time, there is a gap between the locking member 34 and the locking position, and the turntable 1 is rotated to the angle required by the user. The user rotates the grip 42 until the position where the abutting portion 411 abuts against the locking assembly is rotated from the second extreme position to the first extreme position, and the locking assembly 3 moves toward the locking position, and the locking member 34 abuts against the side wall of the locking member 5. The turntable is rotated at a small angle until the locking member 34 extends into the locking position on the locking member 5, so that the locking member 34 is locked and matched with the locking position. At this time, the angle adjustment of the turntable 1 is completed.

[0096] Embodiment 1

[0097] See attached Figure 1-5 The present embodiment provides a locking device for a cart, which includes a cart body 2, a turntable 1 and a rotating shaft 11 arranged on the turntable 1, the rotating shaft 11 is rotatably connected to the cart body 2, and includes: a connecting component, including a clamping member 5 that can be sleeved on the rotating shaft 11, the clamping member 5 can be rotatably connected to the rotating shaft 11, the clamping member 5 can be fixedly connected to the cart body 2, and a plurality of clamping positions are arranged at intervals on the side wall of the clamping member 5; a locking component 3 arranged on the turntable 1, the first end of the locking component 3 can extend into the clamping position; a pushing component 4, one end of the pushing component 4 abuts against the second end of the locking component 3, and under the action of external force, the pushing component 4 can drive the first end of the locking component 3 to move toward the clamping position until the first end of the locking component 3 extends into and is fixedly clamped in the clamping position.

[0098] In this embodiment, the locking device is mainly used in a medical cart. The locking device is used to lock the turntable 1. When the turntable 1 is rotated to the angle required by the user, the turntable 1 is locked relative to the cart body 2 through the locking device.

[0099] The locking device in this embodiment is arranged on the turntable 1, that is, the snap-fit ​​member 5 of the connecting assembly is sleeved on the rotating shaft 11 of the turntable 1, the locking assembly 3 and the pushing assembly 4 are both arranged on the turntable 1, and the locking assembly 3 is arranged between the pushing assembly 4 and the snap-fit ​​member 5, and the two ends of the locking assembly 3 can respectively abut against the pushing assembly 4 and the snap-fit ​​member 5, so as to realize the linkage operation of the pushing assembly 4, the locking assembly 3 and the snap-fit ​​member 5.

[0100] In this embodiment, the number and size of the clamping parts 5 are not limited, as long as the clamping parts 5 can be sleeved on the rotating shaft 11 , and the number of the clamping parts 5 is set according to actual conditions.

[0101] In this embodiment, the number of locking assemblies 3 is not limited, as long as the clamping members 5 and the locking assemblies 3 are arranged in a one-to-one correspondence.

[0102] In this embodiment, the locking device includes a locking assembly 3 and a clamping member 5 .

[0103] See attached Figure 4 The clamping member 5 is an annular structure, and a plurality of clamping positions are evenly spaced on the side wall of the clamping member 5, and the intervals between adjacent clamping positions are set according to actual conditions.

[0104] In this embodiment, the snap-fitting positions have a circular hole structure, and the intervals between adjacent snap-fitting positions are smaller than the radius of the circular hole structure. This can expand the adjustable range of the turntable 1, so that when the turntable 1 rotates a small angle, the locking assembly 3 can be snap-fitted and fixed with the snap-fitting positions.

[0105] In this embodiment, when the pushing component 4 is rotated from the locked position to the unlocked position, the first end of the locking component 3 can move away from the locking position until the first end of the locking component 3 is disengaged from the locking position; when the locking component 3 is in the unlocked state, there is a gap between the first end of the locking component 3 and the locking position.

[0106] In this embodiment, when the pushing assembly 4 is in the locking position, the first end of the locking assembly 3 abuts against the side wall of the clamping member 5, or the first end of the locking assembly 3 is clamped and fixed to the clamping position.

[0107] In this embodiment, the pushing component 4 can rotate relative to the locking component 3, and the pushing component 4 includes an abutment member 41 and a holding member 42 that are connected to each other. The abutment member 41 is provided with an abutment portion 411 on the peripheral side, and the abutment portion 411 can abut against the locking component 3; when the locking component 3 abuts against the first extreme position of the abutment portion 411, the locking component 3 can be engaged with the engaging position; when the locking component 3 abuts against the second extreme position of the abutment portion 411, there is a gap between the locking component 3 and the engaging component 5.

[0108] In this embodiment, the abutment member 41 and the holding member 42 are fixedly connected, the abutment member 41 has a rotating shaft, a mounting hole is provided on the turntable 1, the rotating shaft is arranged in the mounting hole, the abutment member 41 and the holding member 42 can rotate around the axis of the rotating shaft, and the axis of the rotating shaft is arranged to coincide with the axis of the mounting hole.

[0109] In this embodiment, the abutment 41 is a cam-like structure, the distance between the first extreme position of the abutment 411 and the engaging position is a first distance, the distance between the second extreme position of the abutment 411 and the engaging position is a second distance, and the first distance is greater than the second distance.

[0110] See attached Figure 2 The locking assembly 3 includes a fixing assembly and a locking member 34. The fixing assembly is slidably arranged on the turntable 1, and the locking member 34 is convexly arranged on the side of the fixing assembly facing the locking position. Under the action of the pushing assembly 4, the fixing assembly can drive the locking member 34 to move toward or away from the locking position.

[0111] In this embodiment, the structure of the locking member 34 is not limited, and the structure of the engaging position is not limited. It is sufficient to ensure that the locking member 34 can extend into the engaging position to achieve engaging engagement between the locking member 34 and the engaging position.

[0112] In this embodiment, the locking member 34 is a locking shaft, and the engaging position matched with the locking shaft is a locking hole 51 ; the axis of the locking shaft can be arranged perpendicular to the axis of the rotating shaft 11 .

[0113] In this embodiment, the axis of the locking shaft is arranged to coincide with the axis of the locking hole 51 .

[0114] In this embodiment, the length and diameter of the locking shaft are set according to actual conditions.

[0115] In this embodiment, the pushing component 4 can rotate relative to the turntable 1, or move relative to the turntable 1; when the pushing component 4 rotates relative to the turntable 1, the abutment position of the pushing component 4 and the locking component 3 is a cam-like structure to achieve unlocking or locking; when the pushing component 4 moves relative to the turntable 1, the pushing component 4 moves toward or away from the engaging position, thereby driving the locking component 3 to move toward or away.

[0116] In this embodiment, a second limit block 13 is also included, and the second limit block 13 can be fixed relative to the rotating shaft 11; a limited space is also arranged on the peripheral side wall of the abutment 41, and the second limit block 13 is arranged in the limited space. The second limit block 13 can abut against the limited space to limit the rotation angle of the abutment part 411.

[0117] In this embodiment, the second limit block 13 is fixedly connected to the turntable 1. Preferably, the second limit block 13 is integrally formed with the turntable 1.

[0118] In this embodiment, a limiting space and an abutment portion 411 are provided on the peripheral side wall of the abutment member 41, and the limiting space has two limiting surfaces arranged opposite to each other. During the rotation of the second limiting block 13 in the limiting space, the second limiting block 13 can abut against the two limiting surfaces arranged opposite to each other to limit the rotation angle of the abutment member 41 around the axis of the rotation shaft; when the second limiting block 13 abuts against the first limiting surface, the first limit position of the abutment portion 411 rotates to abut against the locking assembly 3, and when the second limiting block 13 abuts against the second limiting surface, the second limit position of the abutment portion 411 rotates to abut against the locking assembly 3.

[0119] In this embodiment, the specific shapes of the limit block 13, the limit space and the abutment portion 411 are not set, as long as the limit block 13, the limit space and the abutment portion 411 cooperate with each other to drive the locking assembly 3 to move toward the locking position.

[0120] In this embodiment, the limiting space and the abutting portion 411 are arranged opposite to each other, and there is a gap between the limiting space and the abutting portion 411 .

[0121] See attached Figure 2The fixing assembly includes a first fixing member 31, a second fixing member 32 and a first elastic member 33 sleeved on the locking member 34; the first elastic member 33 is arranged between the first fixing member 31 and the second fixing member 32, and the first elastic member 33 is in a first compression state; the locking member 34 can abut against the side wall of the connecting assembly, and under the action of the side wall of the connecting assembly, the locking member 34 can move toward the pushing assembly 4, and the first elastic member 33 is in a second compression state; wherein the compression degree of the second compression state is greater than the compression degree of the first compression state; under the action of the pushing assembly 4 and the first elastic member 33, the locking member 34 can extend into the locking position.

[0122] In this embodiment, the first fixing member 31 and the second fixing member 32 are relatively fixed, and a receiving space is formed between the first fixing member 31 and the second fixing member 32 . The receiving space is used to receive the first elastic member 33 .

[0123] In this embodiment, a limiting step is provided on the locking member 32 , the limiting step is provided in the above-mentioned accommodation space, and one end of the first elastic member 33 abuts against the second fixing member 32 , and the other end of the first elastic member 33 abuts against the limiting step.

[0124] In this embodiment, a first through hole is provided on both the first fixing member 31 and the second fixing member 32, and the locking member 34 passes through the first through hole on the first fixing member 31 and the first through hole on the second fixing member 32 in sequence; under the action of external force, the locking member 34 can move relative to the first fixing member 31 and the second fixing member 32.

[0125] In this embodiment, the second fixing member 32 is formed by at least two fixing members that are detachably buckled together, and the two fixing members are buckled together to form a first through hole; the diameter of the first elastic member 33 is larger than the diameter of the first through hole, and the diameter of the limiting step is larger than the diameter of the first through hole;

[0126] The installation process of the locking member 34 is as follows: the first elastic member 33 is sleeved on the locking member 34, and one end thereof is abutted against the limiting step, one end of the locking member 34 is passed through the first through hole of the first fixing member 31, part of the locking member 34 is placed on a fixing member, the two fixing members are buckled, and the other end of the first elastic member 33 is abutted against the second fixing member 32, so that the locking member 34 is fixed to the fixing assembly.

[0127] In this embodiment, when the locking member 34 rotates to abut against the side wall of the locking member 5, the locking member 34 has not yet engaged with the engaging position, and there is a gap between the locking member 34 and the engaging position. At this time, the locking member 34 moves toward the pushing assembly 4, and the first elastic member 33 is compressed; the turntable 1 is rotated at a small angle, and under the action of the elastic force of the compressed first elastic member 33, the first elastic member 33 drives the locking member 34 to move toward the engaging position.

[0128] In this embodiment, the fixing assembly further includes a slide rail structure 35 , which can be slidably connected to the turntable 1 ; the first fixing member 31 and the second fixing member 32 are both fixedly connected to the slide rail structure 35 .

[0129] In this embodiment, the length direction of the slide rail structure 35 is arranged parallel to the axial direction of the locking member 34. The number of the slide rail structures 35 is not limited, and the number of the slide rail structures 35 can be one or two relatively arranged.

[0130] Preferably, the slide rail structures 35 are arranged relatively to each other, the first fixing member 31 , the second fixing member 32 and the third fixing member 36 are all fixedly arranged between the two slide rail structures 35 , and the slide rail structure 35 is slidably connected to the turntable 1 .

[0131] In this embodiment, it also includes a first limit block 12, which can be fixed relative to the rotating shaft 11, and a first end of the first limit block 12 is provided with a receiving hole, and one end of the locking member 34 can be received in the receiving hole; the fixing assembly also includes a third fixing member 36 and a second elastic member 37, and the third fixing member 36 is fixedly connected to the slide rail structure 35; the second end of the first limit block 12 abuts against the first end of the second elastic member 37, the second end of the second elastic member 37 abuts against the first end of the third fixing member 36, and the second end of the third fixing member 36 abuts against the pushing assembly 4; in the process of the abutting position of the abutting portion 411 and the third fixing member 36 rotating from the second extreme position to the first extreme position, the locking assembly 3 moves toward the connecting assembly, and the distance between the third fixing member 36 and the first limit block 12 gradually decreases until the locking member 34 is fixedly engaged with the engaging position.

[0132] In this embodiment, the first limit block 12 can be fixedly connected relative to the turntable 1 , and preferably the first limit block 12 and the turntable 1 are integrally formed.

[0133] In this embodiment, when the pushing component 4 rotates toward the locking position, the pushing component 4 pushes the third fixing member 36 to move toward the first limit block 12, and the distance between the third fixing member 36 and the first limit block 12 is reduced, and the second elastic member 37 arranged between the third fixing member 36 and the first limit block 12 is compressed; when the pushing component 4 rotates to the unlocking position, the pushing component 4 does not generate a thrust on the third fixing member 36. Under the action of the elastic force of the compressed second elastic member 37, the third fixing member 36 moves toward the side away from the locking position, and drives the slide rail structure 35 fixedly connected to it to move toward the side away from the locking position, thereby realizing the unlocking and resetting of the locking member 34.

[0134] In this embodiment, the first elastic member 33 and the second elastic member 37 are both springs.

[0135] In this embodiment, the axis of the receiving hole, the axis of the first through hole, and the axis of the locking member 34 coincide with each other.

[0136] The embodiments of the present application have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The selection of terms used herein is intended to best explain the principles of the embodiments, practical applications, or technical improvements in the market, or to enable other persons of ordinary skill in the art to understand the embodiments disclosed herein.

[0137] In the absence of conflict, the above embodiments and features in the embodiments can be combined with each other.

[0138] The above disclosure is only a preferred embodiment of the present application, and certainly cannot be used to limit the scope of rights of the present application. Therefore, equivalent changes made according to the claims of the present application are still within the scope covered by the present application.

Claims

1. A locking device for a cart, the cart comprising a cart body (2), a turntable (1) and a rotating shaft (11) arranged on the turntable (1), the rotating shaft (11) being rotatably connected to the cart body (2), characterized in that: include: A connecting assembly, comprising a clamping member (5) that can be sleeved on the rotating shaft (11), the clamping member (5) can be rotatably connected to the rotating shaft (11), the clamping member (5) can be fixedly connected to the cart body (2), and a plurality of clamping positions are arranged at intervals on the side wall of the clamping member (5); A locking assembly (3) arranged on the rotating disk (1), wherein a first end of the locking assembly (3) can extend into the locking position; A pushing component (4), one end of which is in contact with the second end of the locking component (3); under the action of an external force, the pushing component (4) can drive the first end of the locking component (3) to move toward the engaging position until the first end of the locking component (3) extends into and is fixedly engaged in the engaging position.

2. The locking device according to claim 1, characterized in that: When the pushing component (4) is rotated from the locked position to the unlocked position, the first end of the locking component (3) can move away from the engaging position until the first end of the locking component (3) is disengaged from the engaging position; When the locking assembly (3) is in an unlocked state, there is a gap between the first end of the locking assembly (3) and the engaging position.

3. The locking device according to claim 1, characterized in that: The locking assembly (3) comprises a fixing assembly and a locking member (34); the fixing assembly is slidably arranged on the rotating disk (1); and the locking member (34) is convexly arranged on a side of the fixing assembly facing the locking position; Under the action of the pushing assembly (4), the fixing assembly can drive the locking member (34) to move towards or away from the locking position.

4. The locking device according to claim 3, characterized in that: The locking member (34) is a locking shaft, and the engaging position matched with the locking shaft is a locking hole (51); The axis of the locking shaft can be arranged perpendicularly to the axis of the rotating shaft (11).

5. The locking device according to claim 1, characterized in that: The pushing assembly (4) is capable of rotating relative to the locking assembly (3), and the pushing assembly (4) comprises an abutting member (41) and a holding member (42) connected to each other, and an abutting portion (411) is provided on the circumference of the abutting member (41), and the abutting portion (411) is capable of abutting against the locking assembly (3); When the locking assembly (3) abuts against the first extreme position of the abutting portion (411), the locking assembly (3) can be engaged with the engaging position; When the locking assembly (3) abuts against the abutment portion (411) at the second extreme position, there is a gap between the locking assembly (3) and the clamping member (5).

6. The locking device according to claim 5, characterized in that: It also includes a second limiting block (13), wherein the second limiting block (13) can be fixed relative to the rotating shaft (11); A limiting space is also provided on the peripheral side wall of the abutment member (41), and the second limiting block (13) is provided in the limiting space. The second limiting block (13) can abut against the limiting space to limit the rotation angle of the abutment portion (411).

7. The locking device according to any one of claims 1 to 6, characterized in that: The fixing assembly comprises a first fixing member (31), a second fixing member (32) and a first elastic member (33) sleeved on a locking member (34); The first elastic member (33) is arranged between the first fixing member (31) and the second fixing member (32), and the first elastic member (33) is in a first compression state; The locking member (34) can abut against the side wall of the connecting assembly. Under the action of the side wall of the connecting assembly, the locking member (34) can move toward the pushing assembly (4), and the first elastic member (33) is in a second compressed state; wherein the degree of compression in the second compressed state is greater than the degree of compression in the first compressed state; Under the action of the pushing component (4) and the first elastic member (33), the locking member (34) can extend into the locking position.

8. The locking device according to claim 7, characterized in that: The first fixing member (31) and the second fixing member (32) are both provided with a first through hole, and the locking member (34) passes through the first through hole on the first fixing member (31) and the first through hole on the second fixing member (32) in sequence; Under the action of external force, the locking member (34) can move relative to the first fixing member (31) and the second fixing member (32).

9. The locking device according to claim 7, characterized in that: The fixing assembly further comprises a slide rail structure (35), and the slide rail structure (35) can be slidably connected to the rotating disk (1); The first fixing member (31) and the second fixing member (32) are both fixedly connected to the slide rail structure (35).

10. The locking device according to claim 7, characterized in that: It also includes a first limit block (12), the first limit block (12) can be fixed relative to the rotating shaft (11), a first end of the first limit block (12) is provided with a receiving hole, and one end of the locking member (34) can be received in the receiving hole; The fixing assembly further comprises a third fixing member (36) and a second elastic member (37), wherein the third fixing member (36) is fixedly connected to the slide rail structure (35); The second end of the first limit block (12) abuts against the first end of the second elastic member (37), the second end of the second elastic member (37) abuts against the first end of the third fixing member (36), and the second end of the third fixing member (36) abuts against the pushing assembly (4); During the process of the abutting position between the abutting portion (411) and the third fixing member (36) rotating from the second extreme position to the first extreme position, the locking assembly (3) moves toward the connecting assembly, and the distance between the third fixing member (36) and the first limiting block (12) gradually decreases until the locking member (34) is engaged and fixed with the engaging position.

11. The locking device according to claim 10, characterized in that: The axis of the receiving hole, the axis of the first through hole and the axis of the locking member (34) coincide with each other.

12. A cart, characterized in that: It comprises a trolley body (2), a turntable (1), a rotating shaft (11) arranged on the turntable (1) and a locking device according to any one of claims 1 to 11; The clamping member (5) is fixedly connected to the trolley body (2), and the turntable (1) is rotatably connected to the trolley body (2) via the rotating shaft (11).

Images