Quantitative syringe for veterinary use

Abstract

The veterinary quantitative injector comprises a needle cylinder, a piston, a driving rod, a one-way gear set, a grip, a trigger, an adjusting screw rod, a rack and a spring, the top of the grip is fixedly connected with the needle cylinder, the piston capable of axially moving is arranged in the needle cylinder, the back face of the piston is fixedly connected with the driving rod, the trigger is slidably connected with the front end of the grip, and the adjusting screw rod is arranged on the trigger. The spring forces the trigger to slide towards the front end of the grip, a mounting groove is formed in the rear end of the grip, the one-way gear set is arranged in the mounting groove, the adjusting screw is screwed in the middle of the trigger and used for controlling the movement stroke of the trigger, and a rack is fixedly connected to the back face of the trigger and penetrates through the grip to be used for driving the one-way gear set. The longer the length of the adjusting screw extending out of the back of the trigger is, the shorter the kneading stroke of the trigger each time is, so that the less the amount of medicine for pushing the piston to inject is; the shorter the extension length of the adjusting screw rod is, the longer the kneading stroke of the trigger each time is, so that the more the amount of medicine injected by the piston is pushed.

Description

Technical Field

[0001] The utility model relates to the technical field of veterinary syringes, in particular to a veterinary quantitative syringe. Background Art

[0002] Veterinarians often need to use syringes when treating farmed poultry or animals. Syringes can inject drugs directly into the bodies of poultry and livestock, avoiding the difficulty of taking drugs orally. During treatment, the medicine is sucked into the syringe and then injected in a quantitative manner. However, when injecting each livestock and poultry, the injection volume of the medicine is visually observed by the scale on the syringe, which can easily lead to inaccurate control of the injection volume of the medicine. The error of each injection volume of the medicine is large, and in severe cases it may even cause the death of livestock and poultry. Therefore, a veterinary quantitative syringe is designed to solve the above problems. Utility Model Content

[0003] In view of the shortcomings of existing veterinary syringes, the purpose of the utility model is to provide a veterinary quantitative syringe, which has the advantages of pre-setting the injection amount and single quantitative injection.

[0004] To achieve the above-mentioned purpose, a technical solution adopted by the utility model is: a veterinary quantitative syringe, comprising a syringe, a piston, a driving rod, a one-way gear set, a grip, a trigger, an adjusting screw, a rack and a spring, wherein the top of the grip is fixedly connected to the syringe, an axially movable piston is arranged in the syringe, the back of the piston is fixedly connected to the driving rod, the front end of the grip is slidably connected to the trigger, a spring is arranged between the trigger and the grip, the spring forces the trigger to slide toward the front end of the grip, the rear end of the grip has a mounting groove, the one-way gear set is arranged in the mounting groove, the adjusting screw is screwed in the middle of the trigger to control the movement stroke of the trigger, the back of the trigger is fixedly connected to the rack, the rack penetrates the grip to drive the one-way gear set, and the one-way gear set is used to drive the driving rod to push the piston;

[0005] Preferably, the driving rod also has arc-shaped racks on both sides;

[0006] Preferably, the one-way gear set comprises a driving gear, a driven gear and a return spring, the two side end faces of the driven gear have extended rotating shafts, the rotating shafts are rotatably connected to the mounting grooves at the rear end of the handle, the driving gear is sleeved on the rotating shaft at one side end face of the driven gear through a through hole at the center, the contact end faces of the driving gear and the driven gear both have one-way teeth, the return spring forces the one-way teeth between the driving gear and the driven gear to contact each other, the driving gear is meshed with the rack, and the driven gear is meshed with the arc-shaped rack;

[0007] Further preferably, during the movement of the rack toward the rear end of the handle, the one-way teeth between the driving gear and the driven gear mesh, and during the movement of the rack toward the front end of the handle, the one-way teeth between the driving gear and the driven gear repel each other and cannot mesh;

[0008] Preferably, the open end of the syringe also has a damping cover, and the damping cover is used to locate the position of the driving rod;

[0009] The beneficial effects of the utility model are: 1. By rotating the adjusting screw screwed in the middle of the trigger, the length of the adjusting screw extending out of the back of the trigger can be changed. The longer the extending length of the adjusting screw is, the shorter the stroke that the trigger can be pinched each time, thereby the shorter the distance the piston is pushed to move, and the less the amount of liquid medicine injected; the shorter the extending length of the adjusting screw is, the longer the stroke that the trigger can be pinched each time, thereby the shorter the distance the piston is pushed to move, and the more the amount of liquid medicine injected; 2. The single injection amount of the drug can be freely set according to the body shape of different animals, so that there is no need to confirm the injection amount by visually observing the scale on the needle tube during injection, thereby achieving the purpose of improving the accuracy of the injection amount of the liquid medicine. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 This is a cross-sectional structural view of the utility model;

[0011] Figure 2 This is a structural view of the combined state of the piston and the driving rod of the utility model;

[0012] Figure 3 For this utility model Figure 1 Sectional structural view in the middle AA direction;

[0013] Figure 4 This is a three-dimensional structural view of the one-way gear set of the utility model. DETAILED DESCRIPTION

[0014] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0015] It should be noted that, in the description of the present invention, terms such as "up", "down", "left", "right", "inside", and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings. This is merely for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0016] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "provided with", and "set" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0017] See also Figures 1 to 4 , the utility model embodiment includes:

[0018] A quantitative syringe for veterinary use, comprising a syringe 1, a piston 2, a driving rod 3, a one-way gear set 4, a grip 5, a trigger 6, an adjusting screw 7, a rack 8 and a spring 9, wherein the top of the grip 5 is fixedly connected to the syringe 1, an axially movable piston 2 is arranged in the syringe 1, the back of the piston 2 is fixedly connected to the driving rod 3, the front end of the grip 5 is slidably connected to the trigger 6, a spring 9 is arranged between the trigger 6 and the grip 5, the spring 9 forces the trigger 6 to slide toward the front end of the grip 5, the rear end of the grip 5 has a mounting groove 51, the one-way gear set 4 is arranged in the mounting groove 51, the adjusting screw 7 is screwed into the middle part of the trigger 6 for controlling the movement stroke of the trigger 6, the back of the trigger 6 is fixedly connected to the rack 8, the rack 8 penetrates the grip 5 for driving the one-way gear set 4, and the one-way gear set 4 is used to drive the driving rod 3 to push the piston 2;

[0019] The driving rod 3 also has arc-shaped racks 31 on both sides;

[0020] The one-way gear set 4 includes a driving gear 41, a driven gear 42 and a return spring 45. The two side end surfaces of the driven gear 42 have extended rotating shafts 43. The rotating shafts 43 are rotatably connected to the mounting grooves 51 at the rear end of the handle 5. The driving gear 41 is sleeved on the rotating shaft 43 at one side end surface of the driven gear 42 through a through hole at the center. The contact end surfaces of the driving gear 41 and the driven gear 42 both have one-way teeth 44. The return spring 45 forces the one-way teeth 44 between the driving gear 41 and the driven gear 42 to contact each other. The driving gear 41 is meshed with the rack 8, and the driven gear 42 is meshed with the arc-shaped rack 31.

[0021] When the rack 8 moves toward the rear end of the handle 5, the one-way teeth 44 between the driving gear 41 and the driven gear 42 are engaged. When the rack 8 moves toward the front end of the handle 5, the one-way teeth 44 between the driving gear 41 and the driven gear 42 repel each other and cannot engage.

[0022] The open end of the syringe 1 also has a damping cover 10, and the damping cover 10 is used to locate the position of the driving rod 3;

[0023] Through the above settings, in the actual working process, its specific working principle is as follows:

[0024] Quantitative adjustment: by rotating the adjusting screw 7 screwed in the middle of the trigger 6, the length of the adjusting screw 7 extending out of the back of the trigger 6 can be changed. The longer the adjusting screw 7 extends, the shorter the stroke that the trigger 6 can be pinched each time, thereby the shorter the distance that the piston 2 can be pushed to move, and the less the amount of liquid medicine injected; the shorter the length of the adjusting screw 7 extends, the longer the stroke that the trigger 6 can be pinched each time, thereby the shorter the distance that the piston 2 can be pushed to move, and the more the amount of liquid medicine injected; the required injection dose is confirmed by observing the scale of the movement of the piston 2 in the syringe 1;

[0025] Medicine liquid inhalation: first remove the damping cover 10 at the open end of the syringe 1, then rotate the drive rod 3 so that the driven gear 42 and the arc-shaped rack 31 on the drive rod 3 are no longer engaged, and then the drive rod 3 can be directly pulled backwards, so that the drive rod 3 drives the piston 2 to inhale the medicine liquid into the syringe 1;

[0026] Injection: First, the needle tip is mounted on the head of the syringe 1, and the liquid medicine is injected into the body of the livestock by squeezing the trigger 6. When injecting each livestock, the stroke of squeezing the trigger 6 each time is the same, and the injected medicine is also the same, thereby achieving the purpose of improving the accuracy of the liquid medicine injection amount;

[0027] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A veterinary quantitative syringe, characterized in that: It includes a syringe, a piston, a driving rod, a one-way gear set, a handle, a trigger, an adjusting screw, a rack and a spring. The top of the handle is fixedly connected to the syringe, an axially movable piston is arranged in the syringe, the back of the piston is fixedly connected to the driving rod, the front end of the handle is slidably connected to the trigger, a spring is arranged between the trigger and the handle, the spring forces the trigger to slide toward the front end of the handle, the rear end of the handle has a mounting groove, the one-way gear set is arranged in the mounting groove, the adjusting screw is screwed into the middle part of the trigger to control the movement stroke of the trigger, the back of the trigger is fixedly connected to the rack, the rack passes through the handle to drive the one-way gear set, and the one-way gear set is used to drive the driving rod to push the piston.

2. A veterinary metered dose syringe according to claim 1, characterized in that: The driving rod is also provided with arc-shaped racks on both sides.

3. A veterinary quantitative syringe according to claim 1, characterized in that: The one-way gear set includes a driving gear, a driven gear and a return spring. The end faces of both sides of the driven gear have extended rotating shafts, and the rotating shafts are rotatably connected to the mounting grooves at the rear end of the handle. The driving gear is sleeved on the rotating shaft at one end face of the driven gear through a through hole at the center. The contact end faces of the driving gear and the driven gear both have one-way teeth. The return spring forces the one-way teeth between the driving gear and the driven gear to contact each other, the driving gear is meshed with the rack, and the driven gear is meshed with the arc-shaped rack.

4. A veterinary quantitative syringe according to claim 3, characterized in that: When the rack moves toward the rear end of the handle, the one-way teeth between the driving gear and the driven gear mesh with each other, and when the rack moves toward the front end of the handle, the one-way teeth between the driving gear and the driven gear repel each other and cannot mesh with each other.

5. A veterinary metered dose syringe according to claim 1, characterized in that: The open end of the syringe also has a damping cover, and the damping cover is used to locate the position of the driving rod.

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