CN221033605U - Lock catch structure and cardiopulmonary resuscitation machine - Google Patents

Abstract

The utility model provides a locking structure and a cardiopulmonary resuscitation machine, wherein the locking structure comprises: the buckling assembly is rotationally assembled on the supporting arm and comprises a buckling piece; the locking structure comprises a first locking component movably assembled on the supporting arm and a second locking component fixed on the buckling component, the first locking component can move to a first position or a second position so that the first locking component and the second locking component are mutually fixed, and the connecting shaft is buckled with the buckling component; or the first locking component is separated from the second locking component, and the connecting shaft is unbuckled with the buckle piece; and the restoring component is used for providing restoring force for driving the clamping piece to rotate to be unbuckled with the connecting shaft. The buckling function and the locking function of the locking structure can be integrated through the recovery component, so that the locking structure is simplified; moreover, the buckling piece and the connecting shaft are buckled and aligned conveniently and rapidly, and the buckling, locking and unlocking are convenient, so that the cardiopulmonary resuscitation machine can be operated to rescue patients.

Description

Lock catch structure and cardiopulmonary resuscitation machine

Technical Field

The utility model relates to the technical field of medical instruments, in particular to a locking structure and a cardiopulmonary resuscitation machine.

Background

Cardiopulmonary resuscitation machines are a type of basic life-supporting device that mechanically replaces the manual effort to perform artificial respiration and chest compressions. The medical community has urgent demands for high-quality cardiopulmonary resuscitation technology, and has higher demands on the convenience of cardiopulmonary resuscitator operation.

In the related art, a cardiopulmonary resuscitation machine generally includes a pressing body, a supporting arm and a bottom plate, the supporting arm and the bottom plate are connected through a lock catch structure, the lock catch structure comprises a lock catch structure and a locking structure, the lock catch structure can realize that the supporting arm and the bottom plate are connected through setting up a lock catch piece and a lock catch groove, and the locking structure can lock the supporting arm and the bottom plate together through setting up a locking piece, namely, the lock catch function and the locking function of the lock catch structure are mutually independent, so that the lock catch structure is complex, the lock catch is time-consuming and inconvenient to unlock, and the rescue time is influenced.

Disclosure of utility model

The utility model aims to solve the technical problem that the lock catch structure of the central pulmonary resuscitation machine is complex in the related art.

To solve the above technical problem, a first aspect of the present utility model provides a latch structure for connecting a support arm and a base plate of a cardiopulmonary resuscitation machine, the base plate being provided with a connection shaft, the latch structure being disposed on the support arm and for snap-fit connection with the connection shaft, the latch structure comprising:

The buckling assembly is rotationally assembled on the supporting arm and comprises a buckling piece;

The locking structure comprises a first locking component movably assembled on the supporting arm and a second locking component fixed on the buckling component, and the first locking component can move to a first position or a second position; when the first locking component is positioned at the first position, the first locking component and the second locking component are mutually fixed, and the connecting shaft is buckled with the buckling piece; when the first locking assembly is in the second position, the first locking assembly is separated from the second locking assembly, and the connecting shaft is unbuckled from the buckle; and

And the restoring assembly is used for providing restoring force for driving the buckling piece to rotate to be unbuckled with the connecting shaft.

Optionally, the buckling component further comprises a rotating shaft, the rotating shaft is rotatably assembled on the supporting arm, and the second locking component is fixed on the rotating shaft; the buckle piece is fixed in the axis of rotation, the connecting axle can support the buckle piece rotates around anticlockwise, and when the buckle piece rotates around anticlockwise predetermined angle, first locking component moves to the first position.

Optionally, the fastener is including being fixed in connecting portion of axis of rotation and being fixed in the trip portion of connecting portion, connecting portion with the trip portion connects and forms the holding tank that has the opening, connecting portion are equipped with and are located the butt face in the holding tank, in following the bottom of holding tank is towards open-ended direction, the butt face is close to the height of the one end of holding tank bottom is greater than the butt face is close to the height of the one end of holding tank opening.

Optionally, the connecting portion and the hook portion are disposed on two opposite sides of the accommodating groove, the hook portion is eccentrically disposed with respect to the rotation shaft, and one end of the connecting portion away from the hook portion protrudes from one end of the hook portion away from the connecting portion.

Optionally, the second locking component comprises a limiting piece fixed on the buckling component, and a limiting groove is formed in the periphery of the limiting piece; when the first locking component moves to the first position, the first locking component is embedded in the limit groove; when the first locking component moves to the second position, the first locking component is separated from the limiting groove.

Optionally, the first locking assembly includes:

The base is used for being fixed with the supporting arm, and two ends of the base are communicated to form a sliding cavity;

The sliding piece is assembled in the sliding cavity in a sliding manner along the direction perpendicular to the rotating shaft of the buckling component, and can slide to be embedded in the limiting groove or be separated from the limiting groove;

The elastic piece is fixed in the sliding cavity and is used for providing elastic force for sliding the sliding piece towards the limiting piece; and

And the handle is connected with one end of the sliding piece far away from the limiting piece.

Optionally, the outside of slider is fixed with spacing portion, spacing portion locates in the slip chamber, the elastic component cover is established the outside of slider, just the both ends of elastic component butt respectively in spacing portion with the tip in slip chamber.

Optionally, the restoring component comprises a torsion spring, one end of the torsion spring is fixed on the limiting piece, and the other end of the torsion spring is fixed with the supporting arm.

Optionally, the fastener is provided with two and two the fastener is located respectively the both ends of support arm, the locating part is located two between the fastener, the torsional spring is located the locating part with between the fastener.

In a second aspect the utility model provides a cardiopulmonary resuscitation machine comprising:

pressing the main body;

the two support arms are connected to two ends of the pressing main body, and one end, far away from the pressing main body, of each support arm is provided with the lock catch structure; and

The bottom plate, the both ends of bottom plate are equipped with the connecting axle respectively, two the connecting axle with two the hasp structure corresponds the setting, just the connecting axle can detain the correspondence the hasp structure.

Compared with the related art, the lock catch structure and the cardiopulmonary resuscitator have the beneficial effects that: when the first locking component moves to the first position, the first locking component and the second locking component are mutually fixed, the connecting shaft is buckled with the buckling component, and the second locking component is fixed on the buckling component, so that the first locking component and the buckling component are fixed, the buckling component can not rotate, and the buckling component is locked by the locking structure. When the first locking component moves to the second position, the first locking component and the second locking component are separated from each other, and the connecting shaft and the buckling piece are unbuckled, so that the buckling piece can rotate freely, and the buckling component is unlocked. Moreover, the restoring component can drive the buckling component to rotate so as to reset the buckling component, so that the buckling function and the locking function of the locking structure can be integrated through the restoring component, and the locking structure is simplified; moreover, the buckling piece and the connecting shaft are buckled and aligned conveniently and rapidly, and the buckling, locking and unlocking are convenient, so that the cardiopulmonary resuscitation machine can be operated to rescue patients.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the related art, the drawings that are required to be used in the embodiments or the related technical descriptions will be briefly described, and it is apparent that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the drawings without inventive effort for those skilled in the art.

FIG. 1 is a schematic view illustrating the assembly of a support arm, a base plate and a latch structure in a cardiopulmonary resuscitation machine according to an embodiment of the present utility model;

fig. 2 is a schematic structural view of a locking structure in a locked state in a latch structure according to an embodiment of the present utility model;

Fig. 3 is a schematic structural view of a locking structure in an unlocked state in a locking structure according to an embodiment of the present utility model;

Fig. 4 is a schematic structural view of a buckle in a locking structure according to an embodiment of the present utility model;

fig. 5 is a schematic structural view of a limiting member in a latch structure according to an embodiment of the present utility model;

FIG. 6 is a schematic view of a slider in a latch structure according to an embodiment of the present utility model;

fig. 7 is a cross-sectional view of a locking structure in a locked state in a latch structure according to an embodiment of the present utility model.

In the drawings, each reference numeral denotes: 1. a clip; 11. a connection part; 111. an abutment surface; 12. a hook part; 13. a receiving groove; 14. a flat hole; 2. a torsion spring; 3. a limiting piece; 31. a limit groove; 4. a first locking assembly; 41. a base; 411. a sliding chamber; 42. a slider; 421. a limit part; 422. a limiting ring; 43. an elastic member; 44. a handle; 5. a rotating shaft; 10. a support arm; 101. a support arm; 20. a bottom plate; 201. a connecting shaft; 30. a locking structure.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below are exemplary and intended to illustrate the present utility model and should not be construed as limiting the utility model, and all other embodiments, based on the embodiments of the present utility model, which may be obtained by persons of ordinary skill in the art without inventive effort, are within the scope of the present utility model.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "circumferential", "radial", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplify the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "a plurality" or "a number" means two or more, unless specifically defined otherwise.

Examples:

Referring to fig. 1 to 7, an embodiment of the present utility model provides a cardiopulmonary resuscitation machine including a pressing body, a support arm 10, and a base plate 20. The two support arms 10 are arranged, the two support arms 10 are connected to the two ends of the pressing main body, and a locking structure 30 is arranged at one end, far away from the pressing main body, of the support arm 10; the two ends of the bottom plate 20 are respectively provided with a connecting shaft 201, the two connecting shafts 201 are correspondingly arranged with the two locking structures 30, and the connecting shafts 201 can be buckled into the corresponding locking structures 30. The latch structure 30 has a locked state and an unlocked state, and when the latch structure 30 is in the locked state, the connecting shaft 201 is buckled into the corresponding latch structure 30, so that the support arm 10 and the bottom plate 20 are fixedly connected; when the latch mechanism 30 is in the unlocked state, the connection shaft 201 is disengaged from the latch mechanism to separate the support arm 10 and the base plate 20.

Referring to fig. 1, 2 and 3, the latch structure 30 includes a latch assembly, a return assembly and a locking structure. The buckling component is rotationally assembled on the supporting arm 10 and comprises a buckling piece 1; the locking structure comprises a first locking component 4 movably assembled on the supporting arm 10 and a second locking component fixed on the buckling component, and the first locking component 4 can move to a first position or a second position; when the first locking component 4 is at the first position, the first locking component 4 and the second locking component are fixed to each other so that the connecting shaft 201 and the fastener 1 are buckled; when the first locking assembly 4 is in the second position, the first locking assembly 4 is separated from the second locking assembly to release the connecting shaft 201 from the buckle 1; and, the restoring component is used for providing restoring force for driving the buckling piece 1 to rotate to be unbuckled with the connecting shaft 201.

When the first locking component 4 moves to the first position, the first locking component 4 and the second locking component are fixed with each other, and the connecting shaft 201 is buckled with the buckling component 1, and because the second locking component is fixed on the buckling component, the first locking component 4 and the buckling component are fixed, so that the buckling component 1 cannot rotate, and the buckling component is locked by the locking structure. When the first locking component 4 moves to the second position, the first locking component 4 and the second locking component are separated from each other, and the connecting shaft 201 and the fastening component 1 are disengaged, so that the fastening component 1 can rotate freely, and the fastening component is unlocked. Moreover, the restoring component can drive the buckling component to rotate so as to reset the buckling component, so that the buckling function and the locking function of the locking structure 30 can be integrally arranged through the restoring component, and the locking structure 30 is simplified; moreover, the buckling piece 1 and the connecting shaft 201 are convenient and quick to buckle and align, and the buckling, locking and unlocking are convenient, so that the cardiopulmonary resuscitation machine is beneficial to rescuing patients.

Referring to fig. 2 and 3, the fastening assembly further includes a rotation shaft 5, the rotation shaft 5 is rotatably assembled to the support arm 10, and the second locking assembly is fixed to the rotation shaft 5; the fastening piece 1 is fixed on the rotating shaft 5, the connecting shaft 201 can abut against the fastening piece 1 to rotate around the anticlockwise direction, and when the fastening piece 1 rotates around the anticlockwise direction by a preset angle, the first locking component 4 moves to the first position. Specifically, two support arms 101 are arranged at the end of the support arm 10 at intervals, two ends of the rotating shaft 5 are respectively rotatably assembled on the two support arms 101, and the fastening piece 1 is fixed at the end of the rotating shaft 5. Since the rotation shaft 5 can rotate relative to the support arm 10, and the buckle 1 is fixed on the rotation shaft 5, the buckle 1 can rotate relative to the support arm 10, so that the connection shaft 201 can rotate against the buckle 1.

It should be noted that, in the process of locking the support arm 10 toward the bottom plate 20, the connecting shaft 201 will abut against the buckling member 1, and the buckling member 1 will rotate anticlockwise relative to the support arm 10 after being stressed, so that the restoring assembly is compressed and is in a restoring state. After the fastener 1 rotates by a predetermined angle, the connecting shaft 201 is buckled with the fastener 1, and the first locking component 4 moves to the first position to be mutually fixed with the second locking component, and at this time, the locking structure is in a locking state. When the first locking component 4 moves to the second position under the action of external force, the first locking component 4 is separated from the second locking component, at this time, the locking structure is in an unlocked state, and the fastener 1 is driven by the restoring force provided by the restoring component to rotate clockwise by a predetermined angle so as to enable the connecting shaft 201 and the fastener 1 to be unlocked.

Referring to fig. 2, 3 and 4, in some embodiments, the fastener 1 includes a connection portion 11 fixed to the rotation shaft 5 and a hook portion 12 fixed to the connection portion 11, the connection portion 11 and the hook portion 12 are connected to form a containing groove 13 with an opening, the connection portion 11 is provided with an abutment surface 111 located in the containing groove 13, in a direction along a bottom of the containing groove 13 towards the opening, a height of an end of the abutment surface 111 near the bottom of the containing groove 13 is greater than a height of an end of the abutment surface 111 near the opening of the containing groove 13, so that the abutment surface 111 is obliquely arranged, and it is ensured that the connection shaft 201 can always abut against the abutment surface 111 in a process of buckling the support arm 10 downward with the bottom plate 20, thereby ensuring that the fastener 1 can rotate by a predetermined angle. The abutment surface 111 may be inclined by 15 ° or 30 ° as required.

Referring to fig. 2, 3 and 4, in some embodiments, the connecting portion 11 and the hook portion 12 are disposed on opposite sides of the accommodating groove 13, and an end of the connecting portion 11 away from the hook portion 12 protrudes from an end of the hook portion 12 away from the connecting portion 11, so that in a process of fastening the support arm 10 downward with the base plate 20, the connecting shaft 201 contacts with the abutment surface 111 first, so that the fastening member 1 rotates around the counterclockwise direction, and the fastening member 1 can be guaranteed to rotate until the connecting shaft 201 is fastened into the hook portion 12. The hook portion 12 is eccentrically disposed with respect to the rotation shaft 5, so that the hook portion 12 can be fastened with the connection shaft 201 after rotating around the counterclockwise direction by a predetermined angle, and the connection shaft 201 is fastened into the accommodating groove 13. The accommodating groove 13 may be a U-shaped groove according to actual needs; the cross section of the rotating shaft 5 can be semicircular, the connecting part 11 is provided with a flat hole 14, the flat hole 14 is arranged at one end of the connecting part 11 connected with the clamping hook part 12, and the rotating shaft 5 is fixed in the flat hole 14, so that synchronous rotation of the clamping piece 1 and the rotating shaft 5 is realized.

Referring to fig. 2, 5 and 6, in some embodiments, the second locking assembly includes a limiting member 3 fixed to the fastening assembly, and a limiting groove 31 is formed on a peripheral side of the limiting member 3; when the first locking component 4 moves to the first position, the first locking component is embedded in the limit groove 31; when the first locking assembly 4 moves to the second position, the first locking assembly 4 is disengaged from the limiting groove 31. Specifically, the outside at axis of rotation 5 is established to locating part 3 cover, and wherein, locating part 3 can be the sleeve, and the round pin hole has been seted up to the week side of locating part 3, and locating part 3 realizes with axis of rotation 5 fixed connection through installing the pin in the pin hole to realize locating part 3 and axis of rotation 5's synchronous rotation. Because the limiting piece 3 and the buckling piece 1 are both fixed on the rotating shaft 5, the limiting piece 3 rotates along with the buckling piece 1, when the buckling piece 1 rotates around the anticlockwise direction by a preset angle, the limiting piece 3 also rotates by the preset angle, at the moment, the limiting groove 31 on the limiting piece 3 rotates until the first locking component 4 moves to the first position and is embedded in the limiting groove 31, the first locking component 4 prevents the limiting piece 3 from continuing to rotate, so that the rotating shaft 5 is prevented from rotating, and the locking of the locking structure 30 is realized; when the first locking component 4 moves to the second position under the action of external force and is separated from the limiting groove 31, the locking structure 30 is unlocked, the rotating shaft 5 can rotate, and the fastening member 1 rotates around the second direction under the driving of the restoring force provided by the restoring component until the connecting shaft 201 is separated from the hook portion 12. Preferably, the side of the limiting member 3 near the connecting shaft 201 is a plane, which is beneficial to avoiding the contact between the limiting member 3 and the connecting shaft 201 to prevent the rotation shaft 5 from rotating during the rotation process of the limiting member 3.

Referring to fig. 2, 3 and 7, further, the first locking assembly 4 includes a base 41, a slider 42, an elastic member 43 and a handle 44. The base 41 is fixed with the support arm 10, and two ends of the base 41 are communicated to form a sliding cavity 411; the sliding piece 42 is slidably assembled in the sliding cavity 411 along the direction perpendicular to the rotating shaft (the rotating shaft 5) of the buckling component, and the sliding piece 42 can slide to be embedded in the limiting groove 31 or be separated from the limiting groove 31; the elastic piece 43 is fixed in the sliding cavity 411, and the elastic piece 43 is used for providing elastic force for sliding the sliding piece 42 towards the limiting piece 3; the handle 44 is connected to an end of the slider 42 remote from the stopper 3. When the handle 44 pulls the sliding piece 42 to slide for a certain distance in a direction away from the rotating shaft 5, the sliding piece 42 is separated from the limiting groove 31, and the sliding piece 42 is abutted against the periphery side of the limiting piece 3, at this time, the rotating shaft 5 can rotate, so that the locking structure 30 is in an unlocking state; when the latch 1 rotates around the counterclockwise direction by a predetermined angle, the slider 42 slides to be embedded in the limit groove 31 under the elastic force provided by the elastic member 43, and at this time, the slider 42 prevents the rotation shaft 5 from rotating, so that the latch structure 30 is in the locked state.

Specifically, the sliding member 42 may be a sliding rod, and when the sliding member 42 slides into the limiting groove 31, the sliding member 42 prevents the rotation shaft 5 from rotating by preventing the rotation of the limiting member 3. The elastic piece 43 can be a spring, and because the elastic piece 43 can provide the elastic force that the sliding piece 42 slides towards the direction of the rotating shaft 5, the sliding piece 42 can prop against the periphery side of the limiting piece 3 when being separated from the limiting groove 31, the limiting piece 3 is a sleeve, and the limiting piece 3 is sleeved outside the rotating shaft 5, so that the sliding piece 42 propped against the periphery side of the limiting piece 3 can not interfere the limiting piece 3 to rotate along with the rotating shaft 5. The support arm 10 is provided with a guide groove, the length direction of the guide groove is perpendicular to the axial direction of the rotating shaft 5, and the handle 44 slides along the length direction of the guide groove to drive the sliding piece 42 to slide along the radial direction of the rotating shaft 5.

According to actual needs, one end of the handle 44 connected with the sliding piece 42 is provided with a limiting cavity, the outside of one end of the sliding piece 42 connected with the handle 44 is fixedly provided with a limiting ring 422, the limiting ring 422 is arranged in the limiting cavity, connection between the handle 44 and the sliding piece 42 is achieved, and the connection mode has certain flexibility, and the sliding smoothness of the sliding piece 42 is prevented from being reduced due to overhigh rigidity at the connection position between the handle 44 and the sliding piece 42.

Referring to fig. 2, 3 and 7, in one embodiment, a limiting portion 421 is fixed on the outer side of the sliding member 42, the limiting portion 421 is disposed in the sliding cavity 411, the elastic member 43 is sleeved on the outer side of the sliding member 42, and two ends of the elastic member 43 are respectively abutted against the limiting portion 421 and the end portion of the sliding cavity 411. Specifically, the limiting portion 421 may be a ring sleeved and fixed on the outer side of the sliding member 42, and the limiting portion 421 and the end portion of the sliding chamber 411 together limit the elastic member 43 in the sliding chamber 411. When the handle 44 pulls the slider 42 to slide in a direction away from the rotation shaft 5, the elastic member 43 is in an elastically compressed state; when the handle 44 does not pull the slider 42, the slider 42 slides in a direction approaching the rotation shaft 5 under the elastic force provided by the elastic member 43. In another embodiment, two ends of the elastic member 43 are fixed to the limiting portion 421 and the end of the sliding cavity 411, respectively, and a plurality of elastic members 43 are disposed around the sliding member 42.

In some embodiments, referring to fig. 2 and 3, the restoring assembly includes a torsion spring 2, the torsion spring 2 is sleeved on the outer side of the rotating shaft 5, one end of the torsion spring 2 is fixed to the limiting member 3, and the other end is fixed to the supporting arm 10. Wherein, the tip of locating part 3 is equipped with the mounting hole, and the one end of torsional spring 2 is fixed in the mounting hole of locating part 3, and the other end is fixed in on the support arm 101. It will be appreciated that the torsion spring 2, via the stop 3 and arm 101, always provides a restoring force to the rotatable shaft 5 about the second direction. In other embodiments, torsion spring 2 is connected to catch 1 at one end and arm 101 at the other end. When the buckle 1 is rotated by being abutted against the connecting shaft 201, the torsion spring 2 is pressed by the buckle 1 to be in an elastic recovery state.

Referring to fig. 2, 3 and 7, in some embodiments, two fastening members 1 are provided, two fastening members 1 are respectively disposed at two ends of the supporting arm 10, a limiting member 3 is disposed between the two fastening members 1, and a torsion spring 2 is disposed between the limiting member 3 and the fastening member 1. Wherein, locating part 3 locates between two support arms 101, and two support arms 101 locate between two buckle spare 1, and two support arms 101 and two buckle spare 1 use locating part 3 to set up as symmetry axis symmetry, are favorable to promoting axis of rotation 5 pivoted stability and equilibrium.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.

Claims (10)

1. A latch structure for connect support arm and the bottom plate of cardiopulmonary resuscitation machine, the bottom plate is provided with the connecting axle, latch structure set up in the support arm and be used for with the connecting axle lock is connected, its characterized in that, latch structure includes:

The buckling assembly is rotationally assembled on the supporting arm and comprises a buckling piece;

The locking structure comprises a first locking component movably assembled on the supporting arm and a second locking component fixed on the buckling component, and the first locking component can move to a first position or a second position; when the first locking component is positioned at the first position, the first locking component and the second locking component are mutually fixed, and the connecting shaft is buckled with the buckling piece; when the first locking assembly is in the second position, the first locking assembly is separated from the second locking assembly, and the connecting shaft is unbuckled from the buckle; and

And the restoring assembly is used for providing restoring force for driving the buckling piece to rotate to be unbuckled with the connecting shaft.

2. The latch mechanism of claim 1 wherein said snap-fit assembly further comprises a rotational shaft rotatably mounted to said support arm, said second locking assembly being secured to said rotational shaft; the buckle piece is fixed in the axis of rotation, the connecting axle can support the buckle piece rotates around anticlockwise, and when the buckle piece rotates around anticlockwise predetermined angle, first locking component moves to the first position.

3. The latch structure according to claim 2, wherein the latch member includes a connecting portion fixed to the rotation shaft and a hook portion fixed to the connecting portion, the connecting portion and the hook portion are connected to form a receiving groove having an opening, the connecting portion is provided with an abutment surface located in the receiving groove, and a height of an end of the abutment surface near the bottom of the receiving groove is greater than a height of an end of the abutment surface near the opening of the receiving groove in a direction along the bottom of the receiving groove toward the opening.

4. The latch structure according to claim 3, wherein the connecting portion and the hook portion are disposed on opposite sides of the accommodating groove, the hook portion is eccentrically disposed with respect to the rotation shaft, and an end of the connecting portion away from the hook portion protrudes from an end of the hook portion away from the connecting portion.

5. The latch mechanism according to claim 1, wherein said second locking assembly includes a stopper fixed to said latch assembly, a circumferential side of said stopper being provided with a stopper groove; when the first locking component moves to the first position, the first locking component is embedded in the limit groove; when the first locking component moves to the second position, the first locking component is separated from the limiting groove.

6. The latch structure of claim 5 wherein said first locking assembly comprises:

The base is used for being fixed with the supporting arm, and two ends of the base are communicated to form a sliding cavity;

The sliding piece is assembled in the sliding cavity in a sliding manner along the direction perpendicular to the rotating shaft of the buckling component, and can slide to be embedded in the limiting groove or be separated from the limiting groove;

The elastic piece is fixed in the sliding cavity and is used for providing elastic force for sliding the sliding piece towards the limiting piece; and

And the handle is connected with one end of the sliding piece far away from the limiting piece.

7. The latch structure according to claim 6, wherein a limiting portion is fixed on an outer side of the sliding member, the limiting portion is disposed in the sliding chamber, the elastic member is sleeved on the outer side of the sliding member, and two ends of the elastic member are respectively abutted to the limiting portion and an end portion of the sliding chamber.

8. The latch mechanism of claim 5, wherein said return assembly includes a torsion spring having one end secured to said stop and the other end for securing with a support arm.

9. The latch mechanism of claim 8, wherein two of said snap fasteners are disposed at opposite ends of said support arm, said stop member is disposed between said two of said snap fasteners, and said torsion spring is disposed between said stop member and said snap fasteners.

10. A cardiopulmonary resuscitation machine, comprising:

pressing the main body;

A support arm, two support arms are arranged and connected to two ends of the pressing main body, and one end of the support arm, which is far away from the pressing main body, is provided with a locking structure as claimed in any one of claims 1 to 9; and

The bottom plate, the both ends of bottom plate are equipped with the connecting axle respectively, two the connecting axle with two the hasp structure corresponds the setting, just the connecting axle can detain the correspondence the hasp structure.