One-key three-locking type cardiopulmonary resuscitation machine

Abstract

The present application relates to a one-key three-locking type cardiopulmonary resuscitation machine, comprising a base, a stand column composed of an upper half and a lower half which are telescopically and rotatably connected, a cross arm comprising a first arm section and a second arm section which are rotatably connected, and a pressing head, a one-key locking mechanism comprising a handle, a cam, a lever-shaped arc block, a crank slider locking tooth assembly, and a vertical pull rod locking assembly. The handle is pulled to rotate the cam, which pushes the arc block to rotate around its hinged shaft, so that the right end of the arc block is pressed down and the left end is lifted up. The right end is pressed down to drive the locking tooth block to slide horizontally to the right and insert into the gear ring of the second arm section through the crank slider locking tooth assembly, so as to lock the small deflection degree of freedom. The left end is lifted up to drive the extrusion slider with a tapered section to move up through the vertical pull rod, so that the extrusion ball tightly presses the elastic extrusion sleeve to the radial outside and extrudes the lower half through the extrusion groove, while locking the lifting and rotating degrees of freedom of the stand column. The present application realizes the quick locking of three degrees of freedom through single linkage operation, which greatly improves the positioning efficiency of rescue.

Description

Technical Field

[0001] This invention relates to a one-button, three-lock cardiopulmonary resuscitation machine. Background Technology

[0002] A cardiopulmonary resuscitation (CPR) machine is a resuscitation device used to perform chest compressions and artificial ventilation on patients with cardiac arrest. It can provide continuous, standardized, and uninterrupted chest compressions, significantly improving blood perfusion to the patient's heart and brain organs.

[0003] Among existing cardiopulmonary resuscitation (CPR) machines, the cantilever CPR machine, requiring only one main column to support the horizontal arm, occupies a small space, facilitating rapid setup at the emergency scene or during transport and enabling patient exposure. During the use of a cantilever CPR machine, to ensure the compression head accurately aligns with the standard compression point at the midpoint between the nipples on the patient's chest, multi-dimensional initial position adjustments are typically required. Generally, the initial height of the compression head is adjusted by extending and retracting the column to accommodate patients with different chest thicknesses; then, the initial angle of the horizontal arm is adjusted by rotating the column horizontally. However, relying solely on the single degree of freedom of column rotation results in a curved trajectory for the compression head, making it extremely difficult to directly and accurately align with specific points on the patient's chest. Therefore, a "small deflection mechanism" consisting of two rotating and cooperating segments is typically introduced into the horizontal arm. This mechanism combines the local deflection freedom of the small deflection mechanism with the horizontal rotation freedom of the column, thereby enabling arbitrary translation and precise adjustment of the compression head within a two-dimensional horizontal plane.

[0004] In emergency situations, "every second counts" in saving lives. If the adjustment process of the above three degrees of freedom (up and down extension of the column, horizontal rotation of the column, and rotation of the small deflection mechanism of the cross arm) is driven by a motor, it will not only be slow and bulky, but also consume precious electricity. Therefore, manual pulling of the motor head for quick coarse and fine adjustments is the best adjustment method.

[0005] However, while existing technologies can achieve rapid manual adjustment of multiple degrees of freedom, they face the technical bottleneck of "rapid locking":

[0006] Existing technologies typically require separate locking handles or knobs for the lifting and lowering of the column, the rotation of the column, and the small deflection mechanism of the crossarm. After alignment, medical staff need to lock multiple knobs sequentially, which greatly wastes precious time ("the golden 4 minutes") during the rescue process.

[0007] If the locking process is not synchronized, when locking one degree of freedom, the other degrees of freedom that have been aligned may shift again due to the touch of the hand or the gravity of the machine head itself, which will affect the accuracy of chest compressions and the treatment effect.

[0008] Traditional column locking methods often use direct screw tightening or sleeve clamping, which can easily cause wear on the column surface and loosen or slip under high-frequency, strong mechanical pressing reaction force. Summary of the Invention

[0009] The purpose of this invention is to provide a one-button three-lock cardiopulmonary resuscitation machine that can simultaneously and reliably lock the three degrees of freedom of column lifting, column rotation, and small deflection mechanism rotation through a single linkage operation.

[0010] The technical solution of the present invention is as follows: a one-button three-lock cardiopulmonary resuscitation machine, comprising:

[0011] Base;

[0012] The column includes a lower half fixed to the base and an upper half that can be extended vertically and rotated horizontally and is fitted or inserted onto the lower half.

[0013] The horizontal arm, installed at the upper end of the column, includes a first arm section and a second arm section that rotate and cooperate with each other. The first arm section is connected to the upper half of the column, and the second arm section is equipped with a pressing head.

[0014] The one-button locking mechanism includes a handle, a cam, an arc block, a crank slider locking tooth assembly, and a vertical pull rod locking assembly; the crank slider locking tooth assembly includes a locking tooth block that is slidably mounted on the first arm section, and a toothed ring is fixed at one end of the second arm section near the first arm section;

[0015] The handle is fixedly connected to the cam and is coaxially rotated on the cross arm near the upper end of the column;

[0016] The lower part of the arc block is hinged to the cross arm via a hinge shaft, the upper part of the arc block is linked to the cam, the right end of the arc block is connected to the crank slider locking tooth assembly, and the left end of the arc block is connected to the vertical pull rod locking assembly.

[0017] When the handle is pulled, causing the cam to rotate, it pushes the arc-shaped block to rotate around its hinge axis, causing the right end of the arc-shaped block to press down and the left end to lift up.

[0018] The right end is pressed down, causing the locking tooth block of the crank slider locking tooth assembly to slide horizontally, so that the locking tooth block is inserted into the tooth ring, locking the second arm segment relative to the first arm segment;

[0019] The left end is lifted, causing the vertical tie rod locking assembly to move upward. The vertical tie rod locking assembly then presses against the lower half of the column, simultaneously locking the column's vertical lifting freedom and horizontal rotation freedom.

[0020] Based on the above scheme, the following improvements are made: an anti-locking spring is provided between the locking tooth block and the end of the first arm segment. The anti-locking spring provides the locking tooth block with an elastic force in the direction away from the tooth ring.

[0021] Based on the above scheme, the following improvements are made: the crank slider locking tooth assembly also includes a first and a second force transmission rod that are hinged to each other. The left end of the first force transmission rod is hinged to the right end of the arc block, and the right end of the second force transmission rod is threaded to the locking tooth block. The total length of the second force transmission rod and the locking tooth block is adjusted by the thread.

[0022] Based on the above solution, the following improvements are made: the vertical tie rod locking assembly includes a vertical tie rod and a compression slider connected to the lower end of the vertical tie rod. The upper end of the compression slider has a tapered section with an upwardly decreasing diameter. Multiple compression balls are fitted at the tapered section. An elastic compression sleeve is fitted over the compression balls. A radially penetrating compression groove is provided on the upper half of the elastic compression sleeve. When the compression slider moves upward, it pushes the compression balls to move radially to radially compress the elastic compression sleeve. The elastic compression sleeve deforms radially through the compression groove to compress the lower half.

[0023] The beneficial effects of this application are:

[0024] This invention cleverly combines a small deflection locking (crank-slider locking tooth assembly) with a column lifting and rotation locking (vertical pull rod locking assembly) through the linkage of a handle, cam, and lever-type arc-shaped block. After manual alignment is completed at the emergency scene, medical personnel only need to pull the handle to lock the small deflection freedom of the second arm segment relative to the first arm segment, the lifting freedom of the upper half of the column relative to the lower half, and the horizontal rotation freedom through the lever action of the arc-shaped block ("right end down, left end up"). This completely solves the technical problem of traditional equipment requiring the tightening of multiple independent knobs one by one, which wastes the "golden 4 minutes" of rescue time.

[0025] Traditional multi-knob locking methods are prone to shifting from the aligned position due to hand contact or the weight of the compression head during step-by-step locking. This invention achieves millisecond-level synchronous locking with three degrees of freedom, ensuring zero position drift after the compression head is positioned, thus guaranteeing the accuracy of chest compressions and the effectiveness of treatment.

[0026] Furthermore, the vertical tie rod locking assembly adopts a radial expansion structure of "sloping conical section - extrusion ball - elastic extrusion sleeve". The elastic extrusion sleeve expands outward through the extrusion groove of the upper half and closely contacts and presses against the inner wall of the lower half. This not only generates a strong frictional locking force, effectively resisting the reaction force generated by high-frequency strong pressing and slippage and loosening, but also avoids hard scratches and wear on the metal surface of the column compared with the traditional direct screw tightening method, thus extending the service life of the equipment.

[0027] In the crank-slider locking tooth assembly, the second force transmission rod and the locking tooth block are connected by threads, which facilitates fine adjustment of the total length of the transmission chain, ensures tight meshing between the tooth block and the gear ring, and can better compensate for installation errors. The anti-locking spring continuously provides a reset force away from the gear ring, preventing the locking tooth block from accidentally engaging and locking due to gravity or vibration during daily handling or repositioning, thus ensuring the smoothness and efficiency of the repositioning process. Attached Figure Description

[0028] Figure 1 This is a three-dimensional structural diagram of the upper part of a specific embodiment of a one-button three-locking cardiopulmonary resuscitation machine of the present invention;

[0029] Figure 2 for Figure 1 A three-dimensional view after slicing;

[0030] Figure 3 This is an overall longitudinal sectional view;

[0031] Figure 4 for Figure 3 A magnified view of a section at point B in the middle;

[0032] Figure 5 This is a partial sectional view of the transverse arm.

[0033] In the diagram: 1-base, 2-column, 21-upper section, 211-extrusion groove, 22-lower section, 3-horizontal arm, 31-first arm section, 32-second arm section, 321-gear ring, 33-rotating sleeve, 4-pressing head, 5-handle, 6-cam, 7-arc block, 8-crank slider locking tooth assembly, 81-first force transmission rod, 82-second force transmission rod, 83-locking tooth block, 84-anti-locking spring, 9-vertical pull rod locking assembly, 91-vertical pull rod, 92-extrusion slider, 921-conical section, 93-extrusion ball, 94-elastic extrusion sleeve. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the invention and are not intended to limit the invention; that is, the described embodiments are merely some embodiments of the invention, not all embodiments. The components of the embodiments of the invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0035] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0036] It should be noted that relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0037] The features and performance of the present invention will be further described in detail below with reference to embodiments.

[0038] A specific embodiment of the one-button three-lock cardiopulmonary resuscitation machine of the present invention is as follows: Figures 1 to 5 As shown, the one-button three-lock cardiopulmonary resuscitation machine includes a base 1, a column 2, a horizontal arm 3, a presser head 4, and a one-button locking mechanism.

[0039] The column 2 is installed on the base 1. The column 2 includes a lower half 22 fixed on the base 1 and an upper half 21 sleeved (or inserted) on the lower half 22. The upper half 21 can extend and retract vertically relative to the lower half 22 (for adjusting the initial height of the press head 4) and rotate horizontally about the vertical axis (for adjusting the initial angle of the cross arm 3).

[0040] A horizontal arm 3 is installed at the top of the upper half 21 of the column 2, and the horizontal arm 3 includes a first arm segment 31 and a second arm segment 32 that rotate and cooperate with each other. The first arm segment 31 is fixed to the upper half 21 of the column 2, and the pressing head 4 is installed at the far end of the second arm segment 32. A small deflection mechanism is formed between the first arm segment 31 and the second arm segment 32, allowing the second arm segment 32 to rotate and deflect relative to the first arm segment 31 in the horizontal plane (the deflection angle range is preferably -90° to +90°). The deflection degree of freedom of the second arm segment 32 cooperates with the horizontal rotation degree of freedom of the column 2, enabling the pressing head 4 to achieve translation and precise alignment at any coordinate position in the two-dimensional horizontal plane.

[0041] like Figure 2 , Figure 3 and Figure 5 As shown, a gear ring 321 (or gear) is coaxially fixed at one end of the second arm segment 32 near the first arm segment 31.

[0042] The one-button locking mechanism includes a handle 5, a cam 6, an arc block 7, a crank-slider locking tooth assembly 8, and a vertical pull rod locking assembly 9.

[0043] Drive and linkage components: Handle 5 is fixedly connected to cam 6 and is coaxially mounted on the upper end of cross arm 3 near column 2 via a drive shaft. Arc block 7 is lever-shaped, with its lower part hinged to the first arm segment 31 of cross arm 3 (or cross arm bracket) via a hinge shaft. The upper sidewall of arc block 7 contacts and links with the outer contour of cam 6. The right end of arc block 7 is hinged to crank slider locking tooth assembly 8, and the left end of arc block 7 is hinged to vertical pull rod locking assembly 9.

[0044] Small deflection locking part (crank slider locking tooth assembly 8): as follows Figure 3 and Figure 5 As shown, the crank-slider locking tooth assembly 8 includes a locking tooth block 83 slidably mounted on a guide groove within the first arm segment 31, a first force transmission rod 81, and a second force transmission rod 82. The left end of the first force transmission rod 81 is hinged to the right end of the arc-shaped block 7, the right end of the first force transmission rod 81 is hinged to the left end of the second force transmission rod 82, and the right end of the second force transmission rod 82 is threadedly connected to the locking tooth block 83. By adjusting the thread depth, the total length of the second force transmission rod 82 and the locking tooth block 83 can be precisely adjusted to adjust the initial position and insertion depth of the locking tooth block 83, compensating for installation errors. Two anti-locking springs 84 are symmetrically mounted between the locking tooth block 83 and the end of the first arm segment 31 (or the end of the guide groove). The anti-locking springs 84 continuously provide the locking tooth block 83 with an elastic restoring force in a direction away from the gear ring 321 (i.e., to the left).

[0045] The column lifting and rotating locking part (vertical tie rod locking assembly 9): as follows Figure 3 and Figure 4 ( Figure 3 As shown in the enlarged view at point B, the vertical tie rod locking assembly 9 is installed inside the upper half 21 of the column 2. It includes a vertical tie rod 91 and a pressing slider 92 fixedly connected to the lower end of the vertical tie rod 91. The upper end of the vertical tie rod 91 is hinged to the left end of the arc-shaped block 7. The upper end of the pressing slider 92 has a tapered section 921 with a decreasing diameter upwards. Multiple pressing balls 93 distributed circumferentially are fitted onto the outer side of the tapered section 921. An annular elastic pressing sleeve 94 is fitted around the outer side of the multiple pressing balls 93. Multiple radially penetrating pressing grooves 211 are formed in the upper half 21 of the column 2 corresponding to the positions of the elastic pressing sleeves 94.

[0046] Working principle and usage process:

[0047] Manual free adjustment stage (unlocked state): When the handle 5 is in the unlocked (released) state, under the elastic force of the anti-locking spring 84, the locking tooth block 83 retracts to the left, disengaging from the toothed ring 321 of the second arm section 32, and the small deflection mechanism can rotate freely; at the same time, the vertical pull rod 91 is in the sunken position under the action of gravity or the return spring, the conical section 921 of the squeeze slider 92 releases the outward pushing of the squeeze ball 93, the elastic squeeze sleeve 94 retracts, and the upper half 21 of the column 2 can freely move up and down and rotate horizontally relative to the lower half 22. Medical staff can quickly align the compression head with the midpoint of the line connecting the two nipples in the patient's chest cavity by manually pulling the motor head 4.

[0048] One-button three-locking stage (locked state): After the machine head 4 is aligned, the medical staff pulls the handle 5, which drives the cam 6 to rotate. The outer contour of the cam 6 pushes the upper part of the arc-shaped block 7, causing the arc-shaped block 7 to deflect around its lower hinge axis in a lever-like manner, forming a linkage of "right end pressing down, left end lifting up":

[0049] Right end down pressure: The right end of the arc block 7 is pressed down to push the first force transmission rod 81 and the second force transmission rod 82 to move to the right, overcome the resistance of the anti-locking spring 84, and drive the locking tooth block 83 to slide to the right in the horizontal direction, so that the teeth at the front end of the locking tooth block 83 are accurately inserted into the tooth ring 321 of the second arm segment 32, realizing the first locking-locking cross arm small deflection degree of freedom.

[0050] Left end lift: Simultaneously, the left end of the arc-shaped block 7 lifts, pulling the vertical pull rod 91 upward. The vertical pull rod 91 drives the bottom extrusion slider 92 to move upward in sync. As the extrusion slider 92 moves upward, the lower large-diameter part of its conical section 921 gradually extrudes multiple extrusion balls 93, forcibly pushing the extrusion balls 93 to move radially outward. The extrusion balls 93 push the elastic extrusion sleeve 94 outward, causing the elastic extrusion sleeve 94 to expand radially outward and protrude outward through the extrusion groove 211 on the upper half 21, tightly extruding the inner wall of the lower half 22. Through the huge surface contact friction force, the relative sliding and relative rotation between the upper half 21 and the lower half 22 are locked simultaneously, realizing the second and third locking—simultaneously locking the column's lifting and horizontal rotation degrees of freedom.

[0051] When the lock is released, simply pull the handle 5 back in the opposite direction. Under the action of the anti-locking spring 84 and the elastic restoring force of the mechanism, the locking tooth block 83 exits the tooth ring 321, and the extrusion slider 92 falls to release the extrusion ball 93 and the elastic extrusion sleeve 94, thus restoring the multi-degree-of-freedom free adjustment state.

[0052] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. The scope of patent protection of the present invention shall be determined by the claims. Similarly, any equivalent structural changes made based on the description and drawings of the present invention shall also be included within the scope of protection of the present invention.

Claims

1. One-button three-lock cardiopulmonary resuscitation machine, including: Base; The column includes a lower half fixed to the base and an upper half that can be extended vertically and rotated horizontally and is fitted or inserted onto the lower half. The horizontal arm, installed at the upper end of the column, includes a first arm section and a second arm section that rotate and cooperate with each other. The first arm section is connected to the upper half of the column, and the second arm section is equipped with a pressing head. Its characteristic is that it further includes: The one-button locking mechanism includes a handle, a cam, an arc block, a crank slider locking tooth assembly, and a vertical pull rod locking assembly; the crank slider locking tooth assembly includes a locking tooth block that is slidably mounted on the first arm section, and a toothed ring is fixed at one end of the second arm section near the first arm section; The handle is fixedly connected to the cam and is coaxially rotated on the cross arm near the upper end of the column; The lower part of the arc block is hinged to the cross arm via a hinge shaft, the upper part of the arc block is linked to the cam, the right end of the arc block is connected to the crank slider locking tooth assembly, and the left end of the arc block is connected to the vertical pull rod locking assembly. When the handle is pulled, causing the cam to rotate, it pushes the arc-shaped block to rotate around its hinge axis, causing the right end of the arc-shaped block to press down and the left end to lift up. The right end is pressed down, causing the locking tooth block of the crank slider locking tooth assembly to slide horizontally, so that the locking tooth block is inserted into the tooth ring, locking the second arm segment relative to the first arm segment; The left end is lifted, causing the vertical tie rod locking assembly to move upward. The vertical tie rod locking assembly then presses against the lower half of the column, simultaneously locking the column's vertical lifting freedom and horizontal rotation freedom.

2. The one-button three-lock cardiopulmonary resuscitation machine according to claim 1, characterized in that, An anti-locking spring is provided between the locking tooth block and the end of the first arm section. The anti-locking spring provides the locking tooth block with an elastic force in the direction away from the tooth ring.

3. The one-button three-lock cardiopulmonary resuscitation machine according to claim 1, characterized in that, The crank-slider locking tooth assembly also includes a first and a second force transmission rod that are hinged to each other. The left end of the first force transmission rod is hinged to the right end of the arc-shaped block, and the right end of the second force transmission rod is threaded to the locking tooth block. The total length of the second force transmission rod and the locking tooth block is adjusted by the thread.

4. The one-button three-lock cardiopulmonary resuscitation machine according to claim 1, characterized in that, The vertical tie rod locking assembly includes a vertical tie rod and a compression slider connected to the lower end of the vertical tie rod. The upper end of the compression slider has a tapered section with an upwardly decreasing diameter. Multiple compression balls are fitted at the tapered section. An elastic compression sleeve is fitted over the compression balls. A radially penetrating compression groove is provided on the upper half of the elastic compression sleeve. When the compression slider moves upward, it pushes the compression balls to move radially to radially compress the elastic compression sleeve. The elastic compression sleeve deforms radially through the compression groove to compress the lower half.

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