Pressing main body and cardio-pulmonary resuscitation machine

Abstract

The utility model provides a pressing main body and a cardio-pulmonary resuscitation machine. The pressing main body comprises a supporting seat and a pressing part, the driving assembly is mounted on the supporting seat; the transmission assembly comprises a lead screw, a nut and a guide column, the lead screw is rotationally arranged on the supporting base and connected to the driving assembly, the nut and the lead screw are assembled, the guide column is fixedly connected with the nut and arranged on the outer side of the lead screw in a sleeving mode, and the guide column is in clearance fit with the lead screw; the limiting assembly comprises a limiting sleeve and a limiting part, the limiting sleeve is fixed to the supporting base, the limiting sleeve is provided with a limiting groove, and the length of the limiting groove extends in the length direction of the lead screw; the limiting part is fixed on the outer side of the guide column, and the limiting part is assembled in the limiting groove in a sliding manner; the pressing assembly is connected to the end, away from the nut, of the guide column. And the control assembly is electrically connected to the driving assembly. The driving assembly drives the pressing assembly to move up and down through the nut mechanism, the structure is simple, and the transmission efficiency is high; in addition, the transmission assembly is compact in structure and small in occupied space.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to a pressing main body and a cardiopulmonary resuscitator. Background Art

[0002] With the development and progress of medical science and technology, more and more cardiopulmonary resuscitators are applied to medical institutions and families. The transmission mechanism is an important component on the cardiopulmonary resuscitator, which can convert the mechanical energy of motors, etc. into the kinetic energy for patting the patient's chest cavity.

[0003] In the related art, the driving source of the cardiopulmonary resuscitator is generally a rotary motor, and the rotary motor converts the rotary motion of the motor into the linear motion of the pressing component through the transmission mechanism. However, the current transmission mechanism has a complex structure and low transmission efficiency, resulting in poor pressing effect of the cardiopulmonary resuscitator. Summary of the Utility Model

[0004] The technical problem to be solved by the utility model is to provide a pressing main body and a cardiopulmonary resuscitator, aiming to solve the problems of complex structure and low transmission efficiency of the transmission mechanism in the related art of the cardiopulmonary resuscitator.

[0005] To solve the above technical problem, the first aspect of the utility model provides a pressing main body, including:

[0006] A support base;

[0007] A driving component, installed on the support base;

[0008] A transmission component, including a lead screw, a nut and a guide post, the lead screw is rotatably arranged on the support base and connected to the driving component, the nut is assembled with the lead screw, the guide post is fixedly connected to the nut and sleeved outside the lead screw, and the guide post is in clearance fit with the lead screw;

[0009] A limiting component, including a limiting sleeve and a limiting part, the limiting sleeve is fixed on the support base, the limiting sleeve is provided with a limiting groove, and the length of the limiting groove extends along the length direction of the lead screw; the limiting part is fixed on the outside of the guide post, and the limiting part is slidably assembled in the limiting groove;

[0010] A pressing component, connected to one end of the guide post away from the nut;

[0011] A control component, electrically connected to the driving component.

[0012] Optionally, the transmission component further includes:

[0013] A sheath, sleeved outside the nut;

[0014] A first elastic member is respectively connected to the sheath and the guide post, and the first elastic member is configured to provide a restoring force for driving the sheath to move upward; and,

[0015] A guide sleeve, one end of which is fixedly connected to the pressing assembly, and the other end of which is sleeved outside the sheath, and the guide sleeve is in clearance fit with the sheath.

[0016] Optionally, an abutting block is fixed to the end of the guide post away from the lead nut, and the transmission assembly further includes a second elastic member, and two ends of the second elastic member respectively abut against the abutting block and the pressing assembly.

[0017] Optionally, the sheath is provided with a first relief groove extending along the length direction of the lead screw, the length of the first relief groove is less than that of the limit groove, and at least a part of the first relief groove is disposed opposite to the limit groove, and one end of the limiting portion away from the guide post passes through the first relief groove and extends into the limit groove.

[0018] Optionally, the sheath is in clearance fit with the lead nut, and the clearance between the sheath and the lead nut ranges from 0.55 mm to 0.65 mm.

[0019] Optionally, the sheath is in clearance fit with the limit sleeve, and the clearance between the sheath and the limit sleeve ranges from 0.3 mm to 0.5 mm.

[0020] Optionally, the pressing body further includes a protective cylinder fixed to the support seat and sleeved outside the limit sleeve, a trigger head fixed to the sheath, and a displacement sensor fixed to the inner wall of the protective cylinder and extending along the length direction of the lead screw. The limit sleeve is provided with a second relief groove extending along the length direction of the lead screw, the trigger head passes through the second relief groove and contacts the displacement sensor, and the displacement sensor is electrically connected to the control assembly.

[0021] Optionally, the transmission assembly further includes a rotating seat rotatably assembled on the support seat and connected to the driving assembly. The rotating seat is provided with an opening, the lead screw is fixed to the bottom wall of the rotating seat opposite to the opening, and the lead screw is coaxially arranged with the rotating seat.

[0022] Optionally, a gasket sleeved outside the lead screw is arranged on the bottom wall of the rotating seat, and the lead nut is located on one side of the gasket away from the bottom wall of the rotating seat.

[0023] In a second aspect of the present invention, a cardiopulmonary resuscitator is provided, which includes the pressing body according to any one of the above.

[0024] Compared with related technologies, a pressing main body and a cardiopulmonary resuscitator in the present utility model have the following beneficial effects: The guide post is fixed to the lead nut, the limiting part is fixed to the guide post, and the limiting part is slidably assembled in the limiting groove along the length direction of the lead screw. Thus, the rotation of the lead nut can be restricted by the limiting component, so that when the driving component drives the lead screw to rotate, the lead nut and the lead screw can only move up and down in cooperation with each other. The lead nut drives the guide post to move up and down, and the pressing component follows the guide post to move up and down to achieve pressing. The transmission structure is simple and the transmission efficiency is relatively high. Moreover, the guide post is sleeved outside the lead screw and has a clearance fit with the lead screw, making the structure of the transmission component relatively compact, occupying less space, thereby reducing the space occupancy rate, and further reducing the overall weight of the machine, which is convenient for the use of the cardiopulmonary resuscitator. Description of the Drawings

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or related technologies, the following will briefly introduce the drawings required for use in the description of the embodiments or related technologies. Obviously, the following drawings are only some embodiments of the present utility model. For those skilled in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0026] Figure 1 is the overall structural schematic diagram of the pressing main body in the embodiment of the present utility model;

[0027] Figure 2 is the sectional view of the pressing main body in one direction in the embodiment of the present utility model;

[0028] Figure 3 is Figure 2 the enlarged view of detail A in;

[0029] Figure 4 is the sectional view of the pressing main body in another direction in the embodiment of the present utility model;

[0030] Figure 5 is the structural schematic diagram of the limiting sleeve in the pressing main body in the embodiment of the present utility model.

[0031] In the drawings, each reference numeral represents:

[0032] 1. Support base; 2. Driving component; 3. Transmission component; 31. Lead screw; 32. Nut; 321. Body part; 322. Connecting part; 323. First annular groove; 33. Guide post; 331. Installation groove; 332. Second annular groove; 34. Sheath; 341. First relief groove; 35. First elastic member; 36. Second elastic member; 37. Guide sleeve; 38. Abutting block; 4. Pressing component; 41. Pressing head; 42. Protective cover; 5. Control component; 51. Connecting plate; 52. Circuit board; 6. Limiting part; 7. Limiting sleeve; 71. Limiting groove; 72. Second relief groove; 8. Protective cylinder; 9. Trigger head; 10. Displacement sensor; 20. Rotating seat; 30. Spacer; 40. First blocking ring; 50. Second blocking ring; 60. Protective cover; 70. Driving wheel; 80. Driven wheel. Detailed implementation manner

[0033] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals indicate the same or similar elements or elements with the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are intended to explain the present invention, but should not be construed as limiting the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0034] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "circumferential", "radial", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. These are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.

[0035] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, the meaning of "a plurality" and "several" is two or more, unless otherwise specifically defined.

[0036] Embodiment:

[0037] An embodiment of the present utility model provides a cardiopulmonary resuscitation machine, which includes a pressing main body for patting a patient's chest to perform cardiopulmonary resuscitation on the patient.

[0038] Please refer to Figures 1 to 5 , the pressing main body includes a support base 1, a driving component 2, a transmission component 3, a pressing component 4, a control component 5 and a limiting component. The driving component 2 is installed on the support base 1; the transmission component 3 includes a lead screw 31, a nut 32 and a guide post 33. The lead screw 31 is rotatably arranged on the support base 1 and connected to the driving component 2. The nut 32 is assembled with the lead screw 31. The guide post 33 is fixedly connected to the nut 32 and sleeved outside the lead screw 31. The guide post 33 is in clearance fit with the lead screw 31; the limiting component includes a limiting sleeve 7 and a limiting part 6. The limiting sleeve 7 is fixed to the support base 1. The limiting sleeve 7 is provided with a limiting groove 71, and the length of the limiting groove 71 extends along the length direction of the lead screw 31; the limiting part 6 is fixed to the outside of the guide post 33, and the limiting part 6 is slidably assembled in the limiting groove 71; the pressing component 4 is connected to the end of the guide post 33 away from the nut 32; the control component 5 is electrically connected to the driving component 2.

[0039] The guide post 33 is fixed to the nut 32, and the limiting part 6 is fixed to the guide post 33 and slidably assembled in the limiting groove 71 along the length direction of the lead screw 31. Thus, the rotation of the nut 32 can be restricted by the limiting component, so that when the driving component 2 drives the lead screw 31 to rotate, the nut 32 and the lead screw 31 can only move up and down in cooperation with each other. The nut 32 drives the guide post 33 to move up and down, and the pressing component 4 follows the guide post 33 to move up and down to achieve pressing. The transmission structure is simple and the transmission efficiency is relatively high; moreover, the guide post 33 is sleeved outside the lead screw 31 and in clearance fit with the lead screw 31, making the structure of the transmission component 3 relatively compact, occupying less space, thereby reducing the space occupancy rate and further reducing the overall weight of the machine, which is convenient for the use of the cardiopulmonary resuscitation machine.

[0040] It should be noted that the driving component 2 drives the lead screw 31 to rotate, and the nut 32, the lead screw 31 and the limiting component cooperate with each other to drive the guide post 33 to move up and down, thereby converting the rotational motion of the driving component 2 into a linear motion of the pressing component 4. A lead screw transmission is formed between the lead screw 31 and the nut 32, preferably a ball screw transmission, which improves the smoothness of the cooperation and the transmission accuracy between the nut 32 and the lead screw 31.

[0041] Please refer to Figure 2 and Figure 3, the fixing method between the guide post 33 and the lead nut 32 can be any one of threaded connection, insertion connection, and snap connection. In a specific example, the guide post 33 and the lead nut 32 are fixedly connected by insertion. The lead nut 32 includes a body portion 321 and a connecting portion 322 fixed to the body portion 321. Both the body portion 321 and the connecting portion 322 are threadedly connected to the lead screw 31; the guide post 33 is provided with an installation groove 331, the connecting portion 322 is inserted into the installation groove 331, and the guide post 33 and the lead nut 32 are in interference fit. One end of the connecting portion 322 connected to the body portion 321 is provided with a first annular groove 323, and one end where the peripheral wall and the bottom wall of the installation groove 331 are connected is provided with a second annular groove 332, which can improve the flexibility of the connecting portion 322 and one end of the guide post 33 provided with the installation groove 331, so that the connecting portion 322 can radially contract and the guide post 33 can radially expand during the process of inserting the connecting portion 322 into the installation groove 331, which is beneficial to the insertion of the lead nut 32 into the guide post 33.

[0042] Please refer to Figure 2 and Figure 4 , the transmission assembly 3 further includes a sheath 34, a first elastic member 35, and a guide sleeve 37. The sheath 34 is sleeved outside the lead nut; the first elastic member 35 is respectively connected to the sheath 34 and the guide post 33, and the first elastic member 35 is used to provide a restoring force for driving the sheath 34 to move upward; one end of the guide sleeve 37 is fixedly connected to the pressing assembly 4, and the other end is sleeved outside the sheath 34. The guide sleeve 37 and the sheath 34 are in clearance fit to prevent the guide sleeve 37 and the sheath 34 from contacting each other and generating frictional force to affect the movement of the guide sleeve 37. Wherein, one end of the sheath 34 close to the guide sleeve 37 is provided with a step, and one end of the guide sleeve 37 close to the sheath 34 abuts against the step, so that the guide sleeve 37 can support the sheath 34 to block the downward movement of the sheath 34. According to actual needs, the first elastic member 35 can be a spring.

[0043] Please refer to Figure 2 and Figure 4 , a contact block 38 is fixed to one end of the guide post 33 away from the lead nut 32. The transmission assembly 3 further includes a second elastic member 36. Both ends of the second elastic member 36 respectively abut against the contact block 38 and the pressing assembly 4, and the second elastic member 36 is located inside the guide sleeve 37. The first elastic member 35 is used to provide buffering during pressing. According to actual needs, the second elastic member 36 can be a spring.

[0044] Please refer to Figure 2 , Figure 3 and Figure 4, the sheath 34 is also sleeved outside the guide post 33. The sheath 34 is provided with a first relief groove 341 extending along the length direction of the lead screw 31. The length of the first relief groove 341 is less than that of the limit groove 71, and at least part of the first relief groove 341 is disposed opposite to the limit groove 71. One end of the limiting portion 6 away from the guide post 33 passes through the first relief groove 341 and extends into the limit groove 71. The setting of the first relief groove 341 can prevent the sheath 34 from interfering with the movement of the limiting portion 6.

[0045] In some embodiments, there is an interference fit between the sheath 34 and the nut 32, and the clearance between the sheath 34 and the nut 32 ranges from 0.55 mm to 0.65 mm, such as 0.55 mm, 0.58 mm, 0.60 mm, 0.62 mm, 0.65 mm, etc. Within this clearance range, the sheath 34 and the nut 32 can slide smoothly. There is an interference fit between the sheath 34 and the limit sleeve 7, and the clearance between the sheath 34 and the limit sleeve 7 ranges from 0.3 mm to 0.5 mm, for example, 0.3 mm, 0.35 mm, 0.4 mm, 0.45 mm, 0.5 mm, etc. Within this clearance range, the sheath 34 and the limit sleeve 7 can slide smoothly. Moreover, the clearance between the sheath 34 and the nut 32 is greater than the clearance between the sheath 34 and the limit sleeve 7, that is, within the limited space, the clearance between the sheath 34 and the nut 32 is made as large as possible, so that the assembly tolerance between the nut 32 and the lead screw 31 can be larger, which is beneficial to reducing the assembly difficulty between the lead screw 31 and the nut 32.

[0046] Please refer to Figure 1 , Figure 2 and Figure 3 , the pressing body further includes a protective cylinder 8 fixed to the support base 1 and sleeved outside the limit sleeve 7, a trigger head 9 fixed to the sheath 34, and a displacement sensor 10 fixed to the inner wall of the protective cylinder 8 and extending along the length direction of the lead screw 31. The limit sleeve 7 is provided with a second relief groove 72 extending along the length direction of the lead screw 31. The trigger head 9 passes through the second relief groove 72 and contacts the displacement sensor 10. The displacement sensor 10 is electrically connected to the control component 5. Specifically, when the driving component 2 drives the sheath 34 to start moving downward, the pressing component 4 starts to move downward, and when the pressing component 4 moves to contact the human body, the input current in the driving component 2 increases. When the control component 5 detects the signal of the increased current, it determines this as the initial pressing position. When the pressing component 4 starts to press, the trigger head 9 moves with the sheath 34, and the contact position between the trigger head 9 and the displacement sensor 10 changes. At this time, the displacement sensor 10 will transmit different resistance value signals to the control component 5, and the control component 5 determines the pressing depth of the pressing component 4 according to the resistance value signals, so as to achieve precise control of the pressing depth.

[0047] It should be noted that since the protective cylinder 8 is sleeved outside the limit sleeve 7, the protective cylinder 8 can be folded and covered on the second limit groove 71 on the limit sleeve 7, so as to realize the sealing of the transmission assembly 3.

[0048] Please refer to Figure 3 , in some embodiments, along the length direction perpendicular to the lead screw 31, the trigger head 9 is elastically connected to the sheath 34. For example, the trigger head 9 is elastically connected to the sheath 34 through a spring, so that the trigger head 9 can extend or contract along the length direction perpendicular to the lead screw 31, ensuring that the trigger head 9 can always be in contact with the displacement sensor 10.

[0049] Please refer to Figure 2 and Figure 3 , the transmission assembly 3 further includes a rotating seat 20 rotatably assembled on the support seat 1 and connected to the driving assembly 2. The rotating seat 20 is provided with an opening. The lead screw 31 is fixed to the bottom wall of the rotating seat 20 opposite to the opening, and the lead screw 31 is coaxially arranged with the rotating seat 20. The arrangement of the rotating seat 20 is beneficial to rotatably assemble the lead screw 31 on the support seat 1. Among them, the support seat 1 is rotatably assembled with the support seat 1 through a bearing. The outer ring of the bearing is fixed on the support seat 1, and the rotating seat 20 is assembled on the inner ring of the bearing.

[0050] Please refer to Figure 2 and Figure 3 , a gasket 30 sleeved outside the lead screw 31 is arranged on the bottom wall of the rotating seat 20. The nut 32 is located on the side of the gasket 30 away from the bottom wall of the rotating seat 20. The gasket 30 can not only buffer when the nut 32 impacts the bottom wall of the rotating seat 20, but also reduce the noise generated when the nut 32 impacts the rotating seat 20. According to actual needs, the gasket 30 can be made of flexible materials, such as silicone or rubber, etc., which can slow down the force between the nut 32 and the rotating seat 20.

[0051] Please refer to Figure 1 , Figure 2 and Figure 4 , the pressing assembly 4 includes a pressing head 41 and a protective cover 42. The pressing head 41 is fixed to one end of the sheath 34 extending out of the protective cylinder 8, and the protective cover 42 is fixed to the pressing head 41. The pressing body further includes a first blocking ring 40 fixed to one end of the protective cylinder 8 close to the pressing assembly 4. A second blocking ring 50 is arranged on the outside of one end of the sheath 34 extending out of the protective cylinder 8. When the pressing head 41 retracts until the second blocking ring 50 abuts against the first blocking ring 40, the pressing body retracts at this time.

[0052] Please refer to Figure 1 , Figure 2 and Figure 3, in some embodiments, the pressing body further includes a protective cover 60 fixed to the support base 1. The rotating base 20 is disposed within the protective cover 60, and the protective cover 60 can prevent dust from entering the pressing body and interfering with the movement between the lead screw 31 and the lead nut 32. The driving assembly 2 includes a driving source, and the driving source can be a rotating motor. The transmission assembly 3 further includes a driving pulley 70, a conveyor belt, and a driven pulley 80. The driving pulley 70 is fixed to the output end of the driving source, the driven pulley 80 is sleeved and fixed on the outer side of the rotating base 20, and the conveyor belt is wound between the driving pulley 70 and the driven pulley 80. The driving source drives the rotating base 20 to rotate through the driving pulley 70, the conveyor belt, and the driven pulley 80. The control assembly 5 includes a connecting plate 51 and a circuit board 52. The connecting plate 51 is fixed to the support base 1, and the circuit board 52 is fixed to the connecting plate 51 and electrically connected to the driving source.

[0053] The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A pressing body, characterized in that: include: Support seat; A driving assembly, mounted on the support seat; The transmission assembly comprises a screw rod, a nut and a guide column, wherein the screw rod is rotatably arranged on the support seat and connected to the driving assembly, the nut is assembled with the screw rod, the guide column is fixedly connected with the nut and sleeved on the outside of the screw rod, and the guide column is clearance-matched with the screw rod; The limiting assembly comprises a limiting sleeve and a limiting part, wherein the limiting sleeve is fixed to the supporting seat, the limiting sleeve is provided with a limiting groove, and the length of the limiting groove extends along the length direction of the screw rod; the limiting part is fixed to the outer side of the guide column, and the limiting part is slidably assembled in the limiting groove; A pressing assembly connected to an end of the guide post away from the nut; The control component is electrically connected to the driving component.

2. The pressing body according to claim 1, characterized in that: The transmission assembly also includes: A sheath, which is sleeved on the outer side of the nut; A first elastic member is connected to the sheath and the guide column respectively, and the first elastic member is used to provide a restoring force to drive the sheath to move upward; and A guide sleeve has one end fixedly connected to the pressing assembly and the other end sleeved on the outside of the sheath, and the guide sleeve is clearance-matched with the sheath.

3. The pressing body according to claim 2, characterized in that: An abutment block is fixed to one end of the guide column away from the nut, and the transmission assembly further comprises a second elastic member, and two ends of the second elastic member respectively abut against the abutment block and the pressing assembly.

4. The pressing body according to claim 2, characterized in that: The sleeve is provided with a first clearance groove extending along the length direction of the screw rod, the length of the first clearance groove is smaller than the limiting groove, and the first clearance groove is at least partially arranged opposite to the limiting groove, and the end of the limiting part away from the guide column passes through the first clearance groove and extends into the limiting groove.

5. The pressing body according to claim 2, characterized in that: The sheath and the nut are gap-matched, and the gap between the sheath and the nut is in the range of 0.55 mm to 0.65 mm.

6. The pressing body according to claim 2, characterized in that: The sleeve and the limiting sleeve have a clearance fit, and the clearance between the sleeve and the limiting sleeve has a value ranging from 0.3 mm to 0.5 mm.

7. The pressing body according to claim 2, characterized in that: The pressing body also includes a protective tube fixed to the support seat and sleeved on the outside of the limit sleeve, a trigger head fixed to the sleeve, and a displacement sensor fixed to the inner wall of the protective tube and extending along the length direction of the screw rod. The limit sleeve is provided with a second clearance groove extending along the length direction of the screw rod, the trigger head passes through the second clearance groove and contacts the displacement sensor, and the displacement sensor is electrically connected to the control component.

8. The pressing body according to claim 1, characterized in that: The transmission assembly also includes a rotating seat rotatably assembled on the support seat and connected to the driving assembly, the rotating seat is provided with an opening, the screw rod is fixed to the bottom wall of the rotating seat opposite to the opening, and the screw rod is coaxially arranged with the rotating seat.

9. The pressing body according to claim 8, characterized in that: The bottom wall of the rotating seat is provided with a gasket sleeved on the outer side of the screw rod, and the nut is located on a side of the gasket away from the bottom wall of the rotating seat.

10. A cardiopulmonary resuscitation machine, characterized in that: It comprises a pressing body as described in any one of claims 1-9.

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