A safety trigger for precision instruments

Abstract

This patent relates to the field of medical devices, and particularly to a safety trigger device for precision instruments, comprising: a base, a push rod, a device connecting sleeve, and a trigger control sleeve; the base is movably connected to the device connecting sleeve to form a power cavity, the push rod is located inside the power cavity, and the trigger control sleeve is connected to the base; by using the device of the present invention, operations such as automatic triggering of drug injection can be achieved, reducing relevant operation steps and the operation errors and medical accidents caused thereby, and preventing potential safety hazards caused by medical staff mistakenly using a syringe to inject other drugs due to mistakes.

Description

Technical Field

[0001] This patent relates to the field of medical devices, and particularly to a safety trigger for precision instruments. Background Art

[0002] With the development of science and technology, population growth and aging, there is great room for the development of medical devices. Currently, a variety of automatic injection devices have been developed internationally. These devices can be used for self-administering injections or administering injections to others, and only require triggering the device. Many existing forms of automatic syringes are single-use, but some automatic syringes also allow reloading of hypodermic cartridges.

[0003] In automatic syringes, there are many different triggering methods, including button triggering and squeezing triggering. The button triggering method is that medical staff or patients inject the medicine in the syringe into the human body by pressing the button of the automatic syringe. The squeezing triggering method is to use the pressure generated between the device and the injection site (such as the thigh and abdomen) to activate the automatic syringe, thereby injecting the medicine into the human body. However, when using an automatic syringe with button triggering, the user is very likely to accidentally press the injection button, causing the automatic syringe to start outside the injection site, resulting in waste of the injected medicine and potential medical risks due to incorrect injection positions. When using an automatic syringe with squeezing triggering, the needle will be placed at the injection position. If the squeezing is not in place, the injection cannot be started and it will also cause needle stick injuries. And after the injection is completed, some used medical devices need to be safely recycled. However, it is difficult to determine whether the device can be reused by injecting other medicines after use, thus causing potential medical risks. Therefore, there is an urgent need for a safety trigger to solve the above problems. Summary of the Invention

[0004] To solve the above problems of the prior art, this patent designs a safety trigger for precision instruments, which includes: a base 1, a push rod 2, a device connection sleeve 3, and a trigger control sleeve 4; the base 1 is movably connected to the device connection sleeve 3 to form a power cavity, the push rod 2 is located inside the power cavity, and the trigger control sleeve 4 is connected to the base 1.

[0005] Preferably, the base 1 includes a hollow cylinder cap 11; a hollow cylinder 12 is arranged inside the top surface of the cylinder cap; strip-shaped brackets 13 are symmetrically arranged on both side rims of the cylinder cap 11; a first buckle 14 is fixed on each strip-shaped bracket 13.

[0006] Preferably, the first buckle 14 includes a connecting plate 141 and a protruding structure. The connecting plate 141 of the first buckle 14 is fixed in the connecting hole of the strip-shaped bracket 13. The protruding structure includes an inner protruding structure 142 and an outer protruding structure 143. The inner protruding structure 142 is located inside the connecting plate 141, and the outer protruding structure 143 is located outside the connecting plate 141.

[0007] Furthermore, the connecting plate 141 is made of an elastic material. If pressure is applied to the outer protruding structure 143, the connecting plate 141 undergoes elastic deformation inward. If pressure is applied to the inner protruding structure 142, the connecting plate 141 undergoes elastic deformation outward.

[0008] Preferably, the push rod 2 includes a cylinder 21, a first disc 22, and a spring 23. The first disc 22 is sleeved on the cylinder 21, and the first disc 22 is close to the upper part of the cylinder 21. The spring 23 is sleeved on the upper part of the cylinder 21, and the bottom of the spring 23 is connected to the first disc 22.

[0009] Preferably, the device connecting sleeve 3 includes: a first sleeve 31, a second disc 32, and two second strip-shaped brackets 33. A circular hole 321 is provided at the central position of the second disc 32, and the second disc 32 is embedded in the inner cavity of the first sleeve 31. Second protruding structures 311 are respectively provided on the front side and the rear side of the first sleeve 31. The two second strip-shaped brackets 33 are respectively fixed on the left and right sides of the sleeve 31.

[0010] Preferably, the base 1 and the device connecting sleeve 3 are movably connected to form a power cavity, including: the first sleeve 31 of the device connecting sleeve is arranged between the two strip-shaped brackets 13 of the base, the second protruding structure 311 of the first sleeve is movably connected to the inner protruding structure 142 of the strip-shaped bracket, and the column cap 11 of the base and the first sleeve 31 of the device connecting sleeve form a power cavity.

[0011] Preferably, the push rod 2 is located inside the power cavity, including: the spring 23, the first disc 22 of the push rod, and the cylinder 21 above the first disc are arranged inside the power cavity; the cylinder 21 below the first disc is inserted into the circular hole 321 of the second disc of the device connecting sleeve 3.

[0012] Preferably, the trigger control sleeve 4 includes: a second sleeve 41 and two third long strip-shaped brackets 42. A through hole 421 is provided in the middle part of the third long strip-shaped bracket 42, and a stop piece 422 is provided at the top of the third long strip-shaped bracket 42. The bottom parts of the two third long strip-shaped brackets 42 are respectively fixed to the top of the front side and the rear side of the second sleeve 41.

[0013] Preferably, the connection between the trigger control sleeve 4 and the base 1 includes: arranging the trigger control sleeve 4 outside the base 1, fitting the third long strip bracket 42 of the trigger control sleeve 4 with the strip bracket 13 of the base 1, and fixedly connecting the retaining piece 422 of the third long strip bracket 42 with the outer convex structure 143 of the first buckle 14 to prevent the base 1 from detaching from the trigger control sleeve 4.

[0014] This patent realizes the safe and automatic injection function by using the safety trigger in combination with the medical syringe, and can accurately control the injection depth and the dosage of the injected drug. When the syringe is not needed, the device is in a self-locking state, achieving safe transportation and storage, preventing medical accidents such as needle stick injuries caused by mistakes or carelessness of medical staff or patients, and facilitating the safe recycling and disposal of the device. Brief Description of the Drawings

[0015] Figure 1 is the structure diagram of the device of this patent;

[0016] Figure 2 is the oblique view of the base of this patent;

[0017] Figure 3 is the front view of the base of this patent;

[0018] Figure 4 is the connection diagram of the cylinder and the first disc of this patent;

[0019] Figure 5 is the front view of the device connection sleeve of this patent;

[0020] Figure 6 is the structure diagram of the trigger control sleeve of this patent;

[0021] Figure 7 is the structure of the device of this patent after being triggered;

[0022] Figure 8 is the state of the device of this patent in safe locking;

[0023] Wherein, 1. Base, 11. Cylinder cap, 111. Small hole, 12. Hollow cylinder, 121. Inner cavity hole, 13. Strip bracket, 14. First buckle, 141. Connecting plate, 142. Inner convex structure, 143. Outer convex structure, 2. Pusher, 21. Cylinder, 22. First disc, 23. Spring, 3. Device connection sleeve, 31. First sleeve, 311. Second convex structure, 32. Second disc, 321. Round hole, 33. Second strip bracket, 331. Second inner buckle, 4. Trigger control sleeve, 41. Second sleeve, 411. Ring-shaped rib, 42. Third long strip bracket, 421. Through hole, 422. Retaining piece, 423. Outer rib. Detailed Description of the Invention

[0024] The following will clearly and completely describe the technical solutions in the embodiments of this patent in conjunction with the accompanying drawings in the embodiments of this patent. Obviously, the described embodiments are only a part of the embodiments of this patent, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in this patent without creative efforts shall fall within the scope of protection of this patent.

[0025] A safety trigger for precision instruments, such as Figure 1 As shown, the device includes: a base 1, a push rod 2, a device connecting sleeve 3, and a trigger control sleeve 4; the base 1 is movably connected to the device connecting sleeve 3 to form a power cavity, the push rod 2 is located inside the power cavity, and the trigger control sleeve 4 is connected to the base 1.

[0026] As Figures 2 - 3 As shown, the base 1 includes a hollow cylinder cap 11; a hollow cylinder 12 is provided inside the top surface of the cylinder cap; strip-shaped brackets 13 are symmetrically arranged on both side rims of the cylinder cap 11; a first buckle 14 is fixed on each strip-shaped bracket 13.

[0027] Preferably, a small hole 111 is provided on the top surface of the cylinder cap 11; the center point of the small hole 111 and the center point of the inner cavity hole 121 of the cylinder 12 are on the same vertical line, and the area of the small hole 111 is smaller than the area of the inner cavity hole 121 of the hollow cylinder 12. This small hole 111 can be used to observe whether the cylinder 21 inserted into the inner cavity of the hollow cylinder 12 is detached, so as to ensure whether the device is assembled correctly.

[0028] Preferably, the cylinder cap 11 is a hollow cylinder.

[0029] Preferably, both the inner surface and the outer surface of the strip-shaped bracket 13 are arc-shaped surfaces.

[0030] A connection hole is provided on the strip-shaped bracket 13.

[0031] The first buckle 14 includes a connecting plate 141 and a protruding structure. The connecting plate 141 of the first buckle 14 is fixed in the connection hole of the strip-shaped bracket 13. The protruding structure includes an inner protruding structure 142 and an outer protruding structure 143; the inner protruding structure 142 is located inside the connecting plate 141, and the outer protruding structure 143 is located outside the connecting plate 141.

[0032] The connecting plate 141 is made of an elastic material. If pressure is applied to the outer protruding structure 143, the first buckle 14 moves inward; if pressure is applied to the inner protruding structure 142, the first buckle 14 moves outward.

[0033] Preferably, the base 1 is a plastic part formed by one-time injection molding.

[0034] As Figure 4As shown, the push rod 2 includes a cylinder 21, a first disc 22, and a spring 23; the first disc 22 is sleeved on the cylinder 21, and the first disc 22 is close to the upper part of the cylinder 21; the spring 23 is sleeved on the upper part of the cylinder 21, and the bottom of the spring 23 is connected to the first disc 22.

[0035] Preferably, friction patterns are provided on the upper surface and the lower surface of the first disc 22. The friction pattern on the upper surface of the first disc is used to prevent the spring 23 from sliding on the upper surface of the first disc 22; the friction pattern on the lower surface of the first disc enables better contact between the lower surface of the first disc 23 and the upper surface of the second disc 32, preventing the two discs from sliding relative to each other.

[0036] Preferably, an external thread is provided on the cylinder 21, and an internal thread matching the external thread on the cylinder 21 is provided inside the central hole of the first disc 22. By rotating the first disc 22, the position of the first disc 22 can be adjusted to meet the requirements for different devices.

[0037] Preferably, a scale is provided on the cylinder 21, and through this scale, the position of the first disc can be determined to better adjust the device.

[0038] As Figure 5 shown, the device connecting sleeve 3 includes: a first sleeve 31, a second disc 32, and two second strip-shaped brackets 33; a circular hole 321 is provided at the central position of the second disc 32, and the second disc 32 is embedded in the inner cavity of the first sleeve 31; second convex structures 311 are respectively provided on the front side and the rear side of the first sleeve 31; the two second strip-shaped brackets 33 are respectively fixed on the left and right sides of the sleeve 31.

[0039] A second internal buckle 331 is provided inside the second strip-shaped bracket 33; the second internal buckle 331 is used for connecting with a precision instrument.

[0040] The inner surface and the outer surface of the second strip-shaped bracket 33 are both arc-shaped surfaces.

[0041] As Figure 6 shown, the trigger control sleeve 4 includes: a second sleeve 41 and a third long strip-shaped bracket 42; a through hole 421 is provided in the middle part of the third long strip-shaped bracket 42, and a retaining piece 422 is provided at the top of the third long strip-shaped bracket 42; the bottom of the third long strip-shaped bracket 42 is connected to the top of the second sleeve 41.

[0042] The retaining piece 422 is a transition bevel retaining piece, that is, the inner side of the transition bevel retaining piece is set as an arc-shaped inclined surface, making it easier for the trigger control sleeve 4 to be connected to the base 1.

[0043] The inner surface and the outer surface of the third long strip-shaped bracket 42 are both arc-shaped surfaces.

[0044] An outer side rib 423 is provided on the outside of the third elongated bracket 42; the three elongated brackets 42 are made more stable by the outer side rib 423.

[0045] An oblique angle is provided at the upper part of the third elongated bracket 42, which makes the connection between the trigger control sleeve 4 and the base 1 more stable.

[0046] Preferably, the through hole 421 is a rectangular through hole, and the size of the through hole is larger than the protruding structure of the first buckle 14.

[0047] Optionally, an annular rib 411 is provided on the outside of the second sleeve 41; by applying a thrust force to the annular rib 411, the second sleeve 41 is moved in the direction of the thrust force to trigger the device.

[0048] The active connection between the base 1 and the device connection sleeve 3 to form a power cavity includes: the first sleeve 31 of the device connection sleeve is arranged between the two bar-shaped brackets 13 of the base, and the second protruding structure 311 of the first sleeve is movably connected to the inner protruding structure 142 of the bar-shaped bracket, and the column cap 11 of the base and the first sleeve 31 of the device connection sleeve form a power cavity.

[0049] The push rod 2 is located inside the power cavity and includes: the spring 23, the first disc 22 of the push rod and the cylindrical body 21 above the first disc are arranged inside the power cavity; the cylindrical body 21 below the first disc is inserted into the round hole 321 of the second disc of the device connection sleeve 3.

[0050] The process of assembling the device includes: inserting the upper part of the cylindrical body 21 of the push rod 2 into the inner cavity of the hollow column 12 of the base 1, and sleeving the upper part of the spring 23 outside the hollow column 12; inserting the lower part of the cylindrical body 21 of the push rod 2 into the round hole 321 of the second disc of the device connection sleeve 3 so that the lower surface of the first disc 22 fits against the upper surface of the second disc 32; the second protruding structure 311 of the device connection sleeve 3 is snap-connected to the inner protruding structure 142 on the base. The trigger control sleeve 4 is arranged outside the base 1, and the third elongated bracket 42 of the trigger control sleeve 4 is attached to the bar-shaped bracket 13 of the base 1, and the retaining piece 422 of the third elongated bracket 42 is connected and fixed to the outer protruding structure 143 of the first buckle 14 to prevent the base 1 from separating from the trigger control sleeve 4, thus completing the assembly of the device.

[0051] As Figure 7As shown, in the initial state of the device, the spring 23 is compressed between the base 1 and the push rod 2. Under the pressure of the spring 23, the first disc 22 and the second disc 32 are closely attached to each other; the outer convex structure 143 of the first buckle 14 is closely attached to the inner surface of the third long strip bracket 42; the inner convex structure 142 of the first buckle 14 is fixed to the second convex structure 311 of the device connecting sleeve 3. In the trigger state of the device: the annular rib 411 of the trigger control sleeve 4 drives the trigger control sleeve 4 to slide towards the base under the action of an external force; when the trigger control sleeve 4 slides a certain distance, the outer convex structure 143 of the base 1 slides into the through hole 421 of the trigger control sleeve 4 to fix the positions of the base 1 and the trigger control sleeve 4; at this time, under the action of the spring pressure, and the first buckle is not blocked by the third long strip bracket 42, so that the second convex structure 311 of the device connecting sleeve 3 gives an outward force to the first buckle of the base, causing the first buckle to deform, so that the second convex structure 311 is separated from the inner convex structure 142 of the base; under the action of the spring pressure, the device connecting sleeve 3 and the push rod 2 are pushed to move away from the base together; at the same time, the precision instrument fixed to the device connecting sleeve 3 by the second inner buckle 311 also moves in the same direction; the corresponding operation process is completed.

[0052] As Figure 8 shown, after the device operation is completed, the device is safely locked. The process includes: disengaging the outer convex structure 143 of the base 1 from the through hole 421 of the trigger control sleeve 4 and moving the trigger control sleeve 4 away from the base 1; when the flap 422 of the trigger control sleeve 4 slides into the outer convex structure 143 of the base 1, the positions of the trigger control sleeve 4 and the base 1 are fixed, and the safe locking of the device is completed.

[0053] In the description of this patent, it should be understood that the orientation or positional relationship indicated by terms such as "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inner", "outer", "front", "center", "both ends", etc. is the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing this patent and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of this patent.

[0054] In this patent, unless otherwise clearly defined and limited, terms such as "installation", "setting", "connection", "fixation", "rotation", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components. Unless otherwise clearly defined, for those of ordinary skill in the art, the specific meanings of the above terms in this patent can be understood according to specific circumstances.

[0055] The above-mentioned embodiments have further elaborated on the purpose, technical solutions, and advantages of this patent. It should be understood that the above-mentioned embodiments are only the preferred embodiments of this patent and are not intended to limit this patent. Any modifications, equivalent replacements, improvements, etc. made to this patent within the spirit and principles of this patent should be included in the protection scope of this patent.

Claims

1. A safety trigger for precision instruments, characterized in that, Comprising: A base (1), a push rod (2), a device connection sleeve (3), and a trigger control sleeve (4); the base (1) is movably connected to the device connection sleeve (3) to form a power cavity, the push rod (2) is located inside the power cavity, and the trigger control sleeve (4) is connected to the base (1); The base (1) includes a hollow cylindrical cap (11); a hollow cylinder (12) is provided inside the top surface of the cylindrical cap; strip-shaped brackets (13) are symmetrically provided on both side rims of the cylindrical cap (11); a first buckle (14) is fixed on each strip-shaped bracket (13); The push rod (2) includes a cylinder (21), a first disc (22), and a spring (23); the first disc (22) is sleeved on the cylinder (21), and the first disc (22) is close to the upper part of the cylinder (21); the spring (23) is sleeved on the upper part of the cylinder (21), and the bottom of the spring (23) is connected to the first disc (22); The device connection sleeve (3) includes: a first sleeve (31), a second disc (32), and two second strip-shaped brackets (33); a circular hole (321) is provided at the center position of the second disc (32), and the second disc (32) is embedded in the inner cavity of the first sleeve (31); second protruding structures (311) are respectively provided on the front side and the rear side of the first sleeve (31); the two second strip-shaped brackets (33) are respectively fixed on the left and right sides of the sleeve (31); The trigger control sleeve (4) includes: a second sleeve (41) and two third long strip-shaped brackets (42); a through hole (421) is provided at the middle position of the third long strip-shaped bracket (42), and a stop piece (422) is provided at the top of the third long strip-shaped bracket (42); the bottom parts of the two third long strip-shaped brackets (42) are respectively fixed on the top of the front side and the rear side of the second sleeve (41); The fact that the base (1) is movably connected to the device connection sleeve (3) to form a power cavity includes: the first sleeve (31) of the device connection sleeve is arranged between the two strip-shaped brackets (13) of the base, the second protruding structure (311) of the first sleeve is movably connected to the inner protruding structure (142) of the first buckle (14), and the cylindrical cap (11) of the base and the first sleeve (31) of the device connection sleeve form a power cavity; The assembly relationship of each device is: insert the upper part of the cylinder (21) of the push rod (2) into the inner cavity of the hollow cylinder (12) of the base (1), and sleeve the upper part of the spring (23) outside the hollow cylinder (12); insert the lower part of the cylinder (21) of the push rod (2) into the circular hole (321) of the second disc of the device connection sleeve (3) so that the lower surface of the first disc (22) is attached to the upper surface of the second disc (32); arrange the trigger control sleeve (4) outside the base (1), make the third long strip-shaped bracket (42) of the trigger control sleeve (4) fit with the strip-shaped bracket (13) of the base (1), and connect and fix the stop piece (422) of the third long strip-shaped bracket (42) to the outer protruding structure (143) of the first buckle (14) to prevent the base (1) from separating from the trigger control sleeve (4).

2. The safety trigger for precision instruments according to claim 1, characterized in that The first buckle (14) includes a connecting plate (141) and a protruding structure. The connecting plate (141) of the first buckle (14) is fixed in the connecting hole of the strip-shaped bracket (13). The protruding structure includes an inner protruding structure (142) and an outer protruding structure (143). The inner protruding structure (142) is located inside the connecting plate (141), and the outer protruding structure (143) is located outside the connecting plate (141).

3. The safety trigger for precision instruments according to claim 2, characterized in that, The connecting plate (141) is made of an elastic material. If pressure is applied to the outer protruding structure (143), the connecting plate (141) will undergo elastic deformation inward. If pressure is applied to the inner protruding structure (142), the connecting plate (141) will undergo elastic deformation outward.

4. A safety trigger for precision instruments according to claim 1, characterized in that, The push rod (2) located inside the power cavity includes: a spring (23) of the push rod, a first disc (22), and a cylinder (21) located above the first disc are arranged inside the power cavity. The cylinder (21) located below the first disc is inserted into the round hole (321) of the second disc of the device connecting sleeve (3).

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