A rotary resetting mechanism used in bone marrow puncture needle teaching

Abstract

The present invention relates to the field of medical equipment technology, and specifically to a rotary bone marrow puncture needle resetting mechanism. It comprises a fixed sleeve, which is a circular tubular structure as a whole, and is provided with a cylindrical accommodating cavity extending along the axial direction and passing through from top to bottom, with a fixed ring at the top and a sleeve at the bottom; a push rod, which is arranged in the cylindrical accommodating cavity, with a top stud at the top of the push rod and an embedded portion at the center of the bottom end of the push rod; a pressure rod, which is arranged in the cylindrical accommodating cavity and is arranged below the push rod, with a slot matching the embedded portion at the top of the pressure rod; a downward pressing mechanism, which is arranged at the top of the fixed sleeve and is used to drive the push rod downward, and the downward pressing mechanism includes a threaded sleeve and a handwheel. The present invention enables disposable bone marrow puncture needles to be reused in medical teaching, which greatly reduces teaching costs and reduces the time for medical staff to learn bone marrow puncture needles.

Description

Technical Field

[0001] The present invention relates to the technical field of medical equipment, and in particular to a rotary resetting mechanism used in bone marrow puncture needle teaching. Background Art

[0002] In hematology, many diseases require blood testing. Bone marrow aspiration is the most important and fundamental test for clinically diagnosing blood disorders. The purpose of a bone marrow smear is to determine the degree of nucleated cell proliferation and calculate the percentage, morphology, number, and distribution of each cell type. A bone marrow biopsy, on the other hand, involves removing a small, cylindrical piece of bone marrow tissue, approximately 0.5 to 1 centimeter long, for pathological examination. The material removed maintains the intact bone marrow tissue structure.

[0003] Bone marrow puncture needles are common medical instruments used in bone marrow puncture and biopsy procedures. Their sharp tip reduces effort, provides excellent guidance to prevent tip deviation, and offers fast actuation, high ejection force, a sharp cutting edge, and a full, easy-to-use design. However, they are expensive and currently available as disposable products. Due to the high ejection force required, they are difficult to reposition after use, significantly increasing costs when used in medical education. Summary of the Invention

[0004] The present invention provides a rotary resetting mechanism applied to bone marrow puncture needle teaching, which aims to solve the problem that disposable bone marrow puncture needles are difficult to reposition and reduce teaching costs.

[0005] To achieve the above object, the technical solution of the present invention is:

[0006] The present invention provides a rotary resetting mechanism for use in bone marrow puncture needle teaching, comprising:

[0007] The fixed sleeve is provided with a cylindrical accommodating cavity extending along the axial direction and penetrating up and down, a fixing ring is provided at the top end, and a sleeve opening is provided at the bottom end;

[0008] A push rod is arranged in the cylindrical accommodating cavity; a top stud is provided at the top end of the push rod, and the top stud is provided with an external thread; an embedded portion is provided at the center of the bottom end of the push rod;

[0009] A pressure rod is arranged in the cylindrical accommodating cavity and below the push rod; a slot matching the embedded portion is provided at the top of the pressure rod, and the embedded portion is inserted into the slot;

[0010] A downward pressing mechanism is provided on the top of the fixing sleeve and is used to drive the push rod to move downward, thereby driving the pressing rod to move downward;

[0011] Wherein, the pressing mechanism includes a threaded sleeve and a handwheel, the threaded sleeve is detachably arranged on the top of the fixing ring, the top end of the top stud extends out of the top opening of the threaded sleeve and is threadedly connected to the top opening of the threaded sleeve, and the handwheel is detachably arranged on the top of the top stud.

[0012] Furthermore, the embedded portion is a short rod.

[0013] Furthermore, a plurality of limiting rings are provided on the upper half of the pressure rod.

[0014] Furthermore, the number of the limiting rings is two.

[0015] Furthermore, a conical frustum is provided at the bottom end of the pressure rod.

[0016] The beneficial effects achieved by the present invention are:

[0017] The present invention includes a fixed sleeve, a push rod, a pressure rod and a downward pressing mechanism. The lower end of the fixed sleeve is provided with a sleeve that matches the bone marrow puncture needle. After the bone marrow puncture needle is fired, the firing mechanism pops out, the ejection mechanism is taken out, and the top of the puncture needle shell is fixed on the sleeve; then the ejection mechanism is inserted from the top opening of the fixed sleeve and slid into the inside of the firing mechanism shell; then the pressure rod is inserted to support the force point of the ejection mechanism, and then the push rod is inserted; finally, the downward pressing mechanism is assembled, and the pressure rod is used to push the ejection mechanism downward until it is reset; the firing mechanism shell is pulled out of the puncture needle shell a certain distance, and the safety pin is inserted to complete the reset. Under the action of the present invention, the disposable bone marrow puncture needle can be easily reset without worrying about damage to the bone marrow puncture needle or injury to personnel during the reset process; when the disposable bone marrow puncture needle can be reused in medical teaching, the teaching cost is greatly reduced and the time for medical staff to learn bone marrow puncture needle is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0019] Figure 1 It is a schematic diagram of the use state of the present invention.

[0020] Figure 2 It is a schematic diagram of the overall structure of the present invention.

[0021] Figure 3 It is a cross-sectional view of the present invention.

[0022] Figure 4 It is a three-dimensional view of a pressure rod of the present invention.

[0023] In the figure, 1. fixing sleeve; 11. sleeve mouth; 12. cylindrical accommodating cavity; 13. fixing ring; 2. push rod; 21. embedded part; 3. pressure rod; 31. slot; 32. limiting ring; 33. conical cone; 41. threaded sleeve; 42. top stud; 43. handwheel; 5. bone marrow puncture needle; 51. shell; 52. ejection mechanism; 53. launching mechanism shell.

[0024] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. DETAILED DESCRIPTION

[0025] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0026] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0027] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of such features. In addition, if the meaning of "and / or" appearing in the full text is to include three parallel schemes, taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme in which A and B are satisfied at the same time. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0028] like Figures 1 to 4 As shown, the embodiment provides a rotary resetting mechanism for bone marrow puncture needle teaching, comprising:

[0029] The fixing sleeve 1 is a cylindrical structure as a whole, provided with a cylindrical accommodating cavity 12 extending along the axial direction and penetrating from top to bottom, a fixing ring 13 is provided at the top end, and a sleeve opening 11 is provided at the bottom end; the sleeve opening 11 is used to fix the bone marrow puncture needle 5;

[0030] The push rod 2 is a round rod with a diameter slightly smaller than the inner diameter of the cylindrical accommodating cavity 12, and is disposed in the cylindrical accommodating cavity 12; a top stud 42 is provided at the top of the push rod 2, and the top stud 42 is provided with an external thread; an embedded portion 21 is provided at the center of the bottom end of the push rod 2, and the embedded portion 21 is a short rod;

[0031] The pressure rod 3 is a round rod with a diameter smaller than the inner diameter of the cylindrical accommodating cavity 12. It is arranged in the cylindrical accommodating cavity 12 and below the push rod 2. The top of the pressure rod 3 is provided with a slot 31 that matches the embedded portion 21, and the embedded portion 21 is inserted into the slot 31. The upper half of the pressure rod 3 is provided with a plurality of limiting rings 32. The diameter of the limiting rings 32 is equal to or slightly smaller than the inner diameter of the cylindrical accommodating cavity 12. The function of the limiting rings 32 is to ensure that the pressure rod 3 can move up and down along the axis of the fixed sleeve 1 without shaking. The bottom end of the pressure rod 3 is provided with a conical cone 33. The conical cone 33 is used to support the force point of the launch mechanism for positioning the bone marrow puncture needle 5.

[0032] A downward pressing mechanism is provided on the top of the fixing sleeve 1 and is used to drive the push rod 2 to move downward, thereby driving the pressing rod 3 to move downward, thereby completing the resetting of the bone marrow puncture needle 5;

[0033] Among them, the pressing mechanism includes a threaded sleeve 41 and a handwheel 43. The threaded sleeve 41 passes through from top to bottom. The threaded sleeve 41 is detachably arranged on the top of the fixing ring 13. The top opening of the threaded sleeve 41 is provided with an internal thread matching the top stud 42. The top end of the top stud 42 extends out of the top opening of the threaded sleeve 41 and is threadedly connected to the top opening of the threaded sleeve 41. The handwheel 43 is detachably arranged on the top of the top stud 42.

[0034] In an embodiment of the present invention, the fixing ring 13 is a tubular structure, and the fixing ring 13 is arranged at the top of the fixing sleeve 1. The inner cavity of the fixing ring 13 is connected to the cylindrical accommodating cavity 12, and the inner diameter of the fixing ring 13 is larger than the inner diameter of the cylindrical accommodating cavity 12; the threaded sleeve 41 is embedded in the fixing ring 13 and fixed.

[0035] In an embodiment of the present invention, the sleeve 11 is provided with an internal thread, which matches the external thread at the bottom of the shell 51 of the bone marrow puncture needle 5 , and the bone marrow puncture needle 5 is threadedly fixed in the sleeve 11 .

[0036] In the embodiment of the present invention, there are two limiting rings 32 .

[0037] The bottom end of the threaded sleeve 41 is provided with an external thread, and the top of the fixing ring 13 is provided with an internal thread. The threaded sleeve 41 is threadedly connected to the fixing ring 13.

[0038] Specifically, the specific process of using the present invention is:

[0039] After the bone marrow puncture needle 5 is fired, the firing mechanism pops out and the ejection mechanism 52 is removed; the outer shell 51 of the bone marrow puncture needle 5 is fixed to the sleeve 11 of the fixed sleeve 1. The ejection mechanism 52 is inserted from the top opening of the fixed sleeve 1 and slides into the inside of the firing mechanism shell 53. The pressure rod 3 is inserted so that the conical cone 33 supports the force point of the ejection mechanism 52. The push rod 2 is inserted, the threaded sleeve 41 is sleeved on the top stud 42, and fixed to the fixed sleeve 1, and then the handwheel 43 is fixed to the top stud 42. Turn the handwheel 43, and the push rod 2 moves downward under the action of the thread, driving the pressure rod 3 to move downward, and then pressing the ejection mechanism 52 of the bone marrow puncture needle 5 downward until it is reset. Pull the firing mechanism shell 53 out of the outer shell 51 of the bone marrow puncture needle 5 a certain distance, insert the safety pin, and the reset is complete.

[0040] The above descriptions are merely optional embodiments of the present invention and do not limit the patent scope of the present invention. All equivalent structural transformations made using the contents of the present description and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. A rotary resetting mechanism used in bone marrow puncture needle teaching, characterized in that: include: The fixed sleeve (1) is provided with a cylindrical accommodating cavity (12) extending along the axial direction and penetrating vertically, a fixing ring (13) is provided at the top end, and a sleeve opening (11) is provided at the bottom end; A push rod (2) is arranged in the cylindrical accommodating cavity (12); a top stud (42) is provided at the top end of the push rod (2), and the top stud (42) is provided with an external thread; an embedded portion (21) is provided at the center of the bottom end of the push rod (2); A pressure rod (3) is arranged in the cylindrical accommodating cavity (12) and below the push rod (2); a slot (31) matching the embedded portion (21) is provided at the top end of the pressure rod (3), and the embedded portion (21) is inserted into the slot (31); a conical frustum (33) is provided at the bottom end of the pressure rod (3), and the conical frustum (33) is used to support the force point of the launch mechanism for positioning the bone marrow puncture needle (5); A downward pressing mechanism is arranged on the top of the fixing sleeve (1) and is used to drive the push rod (2) to move downward, thereby driving the pressing rod (3) to move downward; The sleeve (11) is provided with an internal thread, and the internal thread of the sleeve (11) matches the external thread at the bottom of the shell (51) of the bone marrow puncture needle (5), and the bone marrow puncture needle (5) is threadedly connected and fixed in the sleeve (11); the pressing mechanism includes a threaded sleeve (41) and a hand wheel (43), the threaded sleeve (41) is detachably arranged on the top of the fixing ring (13), the top end of the top stud (42) extends out of the top opening of the threaded sleeve (41) and is threadedly connected to the top opening of the threaded sleeve (41), and the hand wheel (43) is detachably arranged on the top of the top stud (42).

2. A rotary resetting mechanism for bone marrow puncture needle teaching according to claim 1, characterized in that: The embedded portion (21) is a short rod.

3. The rotary resetting mechanism for bone marrow puncture needle teaching according to claim 1, characterized in that: The upper half of the pressure rod (3) is provided with a plurality of limiting rings (32).

4. The rotary resetting mechanism for bone marrow puncture needle teaching according to claim 3, characterized in that: The number of the limiting rings (32) is two.

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