CN219539108U - Quantitative injection device - Google Patents

Abstract

The present utility model provides a quantitative injection device comprising: a syringe assembly, the syringe assembly comprising: a sleeve; the core rod has one end extending into the sleeve; the piston is arranged at one end of the core rod, which extends into the sleeve; the sleeve comprises a plurality of first bulges, wherein each first bulge is annular and is arranged on the inner wall of the sleeve along the circumferential direction of the sleeve, and the first bulges are arranged along the length direction of the sleeve; the piston can be caught by any adjacent two of the first protrusions. The quantitative injection device provided by the utility model can conveniently and accurately control the volume of the sucked/pushed liquid medicine, thereby realizing quantitative suction/push of the liquid medicine, saving the use of the liquid medicine and accurately and quantitatively injecting.

Description

Quantitative injection device

Technical Field

The utility model relates to the technical field of medical instruments, in particular to a quantitative injection device.

Background

In daily medical life, the injector is the most used medical tool, and can quickly bring the medicine to all parts of the body through the blood circulation machine, thereby achieving the effect of quick treatment.

Most of the current syringes cannot be used for quantifying medicines, and are inconvenient to use; the chinese patent with publication number CN209984716U discloses an ampoule injection propeller, which comprises an injection frame, an end cover, a propulsion mechanism, a pressurizing mechanism and a rotation regulator, wherein the end cover is not fixedly and detachably installed on the top of the injection frame, a closed cavity is formed, the propulsion mechanism is installed in the cavity of the injection frame, the propulsion mechanism is rotationally connected with the pressurizing mechanism, and the rotation regulator is installed at the bottom of the injection frame. But the structure is complex and inconvenient to operate.

Disclosure of Invention

The present utility model is directed to a quantitative injection device for solving the above-mentioned problems.

In order to achieve the above purpose, the present utility model provides the following technical solutions:

a metered dose injection device comprising: a syringe assembly, the syringe assembly comprising:

a sleeve; the core rod has one end extending into the sleeve; the piston is arranged at one end of the core rod, which extends into the sleeve; the sleeve comprises a plurality of first bulges, wherein each first bulge is annular and is arranged on the inner wall of the sleeve along the circumferential direction of the sleeve, and the first bulges are arranged along the length direction of the sleeve; and, the piston can be caught by any adjacent two of the first protrusions.

Further, the piston includes one or more second protrusions which are annular and are provided on the outer circumferential side of the piston in the circumferential direction of the piston; the second protrusions can be clamped between any two adjacent first protrusions.

Further, the syringe assembly further comprises a needle assembly comprising: the fixed seat is spliced with the sleeve; the needle head is fixedly arranged with the fixing seat.

Further, the quantitative injection device further comprises a syringe fixing assembly including: the fixing ring can be sleeved outside the sleeve; more than two finger-rings are directly/indirectly fixed on the outer side of the fixed ring; and the limiting part is fixedly connected with the fixed ring, and can prop against the lower part of the sleeve when the syringe assembly stretches into the fixed ring from the upper part of the fixed ring.

Further, the limiting member includes: the support piece is fixedly arranged with the fixed ring; more than two limiting blocks are arranged at the lower part of the supporting piece; the connecting rod is connected with the supporting piece and more than two limiting blocks; when the injector component stretches into the fixing ring from the upper part of the fixing ring, more than two limiting blocks can prop against the lower part of the sleeve.

Further, more than two finger loops are fixedly arranged on the supporting piece.

Further, the support includes: the two support blocks are fixedly arranged on two sides of the fixing ring; the limiting blocks are two, and the two limiting blocks are respectively arranged at the lower parts of the two supporting blocks.

Further, the limiting member further includes: the two limiting blocks are connected with the two supporting blocks through the two limiting blocks respectively, and the two limiting blocks can be driven to move oppositely by the two limiting blocks.

Further, the reset element includes: the sliding block is connected with the limiting block through the connecting rod; the guide rod is fixedly connected with the supporting block, and the guide rod penetrates through the sliding block so that the sliding block can slide along the guide rod; and the spring is sleeved on the guide rod so as to enable the sliding block to move towards the inner side of the injector fixing assembly.

Further, more than two guide rods are arranged, and the more than two guide rods are arranged in parallel.

Compared with the prior art, the utility model has the beneficial effects that:

according to the quantitative injection device provided by the utility model, the first bulges are arranged in the sleeve, and the clamping positions for clamping the second bulges are formed between every two adjacent first bulges, so that the second bulges can be accurately controlled to move from one clamping position to the other clamping position, the volume of the sucked/pushed liquid medicine can be accurately controlled, quantitative suction/push-out of the liquid medicine is realized, the use of the liquid medicine is saved, and the accurate quantitative injection is realized. In particular, when the fixed syringe component is further arranged in the quantitative injection device, the fixed syringe component can be stably fixed when the quantitative injection device is used, the syringe component is prevented from falling off, and the medicine liquid can be stably and quantitatively pushed out.

Drawings

Fig. 1: a schematic side view of a metering injection device in one embodiment of the present utility model;

fig. 2: a schematic structural view of a syringe assembly in one embodiment of the utility model;

fig. 3: a schematic side view of a syringe assembly in one embodiment of the utility model;

fig. 4: a schematic view of the underside structure of the syringe assembly in one embodiment of the utility model.

Reference numerals:

1000. a syringe assembly; 1100. a sleeve; 1110. a first protrusion; 1200. a core bar; 1210. a push plate; 1300. a piston; 1310. a second protrusion; 1400. a needle assembly; 1410. a fixing seat; 1420. a needle;

2000. a syringe fixing assembly; 2100. a fixing ring; 2200. a finger ring is sleeved; 2210. a vertical plate; 2220. a through hole; 2230. a rubber pad; 2300. a limiting member; 2310. a support; 2311. a support block; 2320. a limiting block; 2330. a connecting rod; 2340. a reset element; 2341. a slide block; 2342. a guide rod; 2343. a spring; 2350. and (5) connecting a block.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

The present embodiment provides a quantitative injection device, as shown in fig. 1 and 2, including:

a syringe assembly 1000, the syringe assembly 1000 comprising:

sleeve 1100;

a core rod 1200, wherein one end of the core rod 1200 extends into the sleeve 1100;

a piston 1300, wherein the piston 1300 is arranged at one end of the core rod 1200 extending into the sleeve 1100;

the sleeve 1100 includes a plurality of first protrusions 1110, where each of the first protrusions 1110 is annular and is disposed on an inner wall of the sleeve 1100 along a circumferential direction of the sleeve 1100, and a plurality of first protrusions 1110 are disposed along a length direction of the sleeve 1100; and, in addition, the processing unit,

the piston 1300 can be caught by any adjacent two of the first protrusions 1110.

Specifically, the piston 1300 includes one or more second protrusions 1310, the second protrusions 1310 being annular and disposed on the outer circumferential side of the piston 1300 in the circumferential direction of the piston 1300; the second protrusion 1310 can be caught between any adjacent two of the first protrusions 1110. That is, the piston 1300 may be caught by two adjacent first protrusions 1110 through the second protrusions 1310.

In the prior art, the injector comprises a sleeve, a core rod and a piston (generally a rubber plug), wherein the piston is driven by the core rod to move in the sleeve, so that the liquid medicine can be sucked/pushed out. Although the sleeve is generally provided with scales, medical staff can not easily operate the existing syringe to quantitatively push out the liquid medicine.

The present utility model is an improvement over existing syringes, and in particular, the first projection 1110 described above is provided within the sleeve 1100 and the second projection 1310 described above is provided on the piston 1300.

As shown in fig. 2, after the first protrusions 1110 are disposed in the sleeve 1100, a "locking position" capable of locking the second protrusions 1310 may be formed between two adjacent first protrusions 1110. The second protrusion 1310 receives a greater resistance from one detent to another detent. The pushing piston 1300 can accurately control the second protrusion 1310 to move from one locking position to the other locking position when the sleeve 1100 moves, thereby ensuring that the sucked/pushed-out medicine liquid is metered. Thereby the medicine liquid can be quantitatively inhaled to save the medicine use, and the medicine liquid can be quantitatively pushed out to accurately and quantitatively inject.

Preferably, the first protrusions 1110 have the same interval therebetween. Then, when the second protrusion 1310 moves from one of the locking positions to an adjacent one of the locking positions, the pushed-out liquid medicine is equal. Thereby medical staff can conveniently inhale/push out the liquid medicine with certain clamping quantity to realize quantitative inhalation liquid medicine/push-out administration.

As shown in fig. 2, the number of the second protrusions 1310 is only one in the present embodiment, and particularly when the width of the second protrusions 1310 is the same as the width of the entire piston 1300, the edge of the piston 1300 may be regarded as the second protrusions 1310. Of course, more than two second protrusions 1310 may be provided, so that each second protrusion 1310 may be respectively clamped in a corresponding "clamping position", and a better sealing effect of the piston may be achieved.

The prior art piston is typically a rubber plug, made of rubber material, as is the piston 1300 in this embodiment. Also, it is preferable that the second protrusion 1310 is directly formed when the piston 1300 is molded, that is, the piston 1300 is of a unitary structure. Thereby making the fixation of the second protrusion 1310 more secure.

In addition, it is preferable in this embodiment that the first projection 1110 is made of a flexible material such as rubber. In this way, on the one hand, the tightness of the syringe assembly as a whole is ensured, and also the passage of the movement of the second protrusion 1310 from one detent to the other is ensured.

As shown in fig. 2, the core rod 1200 of the present embodiment may also include a push plate 1210 at an end thereof that does not extend into the sleeve 1100, as in the prior art, so that the medical fluid may be easily pushed out.

In one embodiment, as shown in fig. 2, the syringe assembly 1000 further comprises a needle assembly 1400 comprising: a fixing base 1410, wherein the fixing base 1410 is configured to be inserted into the sleeve 1100; the needle 1420 is fixed to the fixed base 1410. Thereby ensuring stable connection of the needle.

In one embodiment, as shown in fig. 1 to 4, the quantitative injection device further includes a syringe fixing assembly 2000, and the syringe fixing assembly 2000 includes:

a fixing ring 2100, wherein the fixing ring 2100 can be sleeved outside the sleeve 1100;

more than two finger loops 2200, wherein more than two finger loops 2200 are directly/indirectly fixed to the outer side of the fixing ring 2100;

and a limiting member 2300, wherein the limiting member 2300 is fixedly connected to the fixing ring 2100, and the limiting member 2300 can abut against the lower portion of the sleeve 1100 when the syringe assembly 2000 is inserted into the fixing ring 2100 from the upper portion of the fixing ring 2100.

As shown in fig. 1 and 3, the finger ring 2200 in the present utility model is specifically composed of a vertical plate 2210, a through hole 2220 formed in the vertical plate 2210, and a rubber pad 2230 outside the through hole 2220. Through hole 2220 facilitates placement of the fingers by the healthcare worker. The rubber pad 2230 is convenient for protecting the finger part of an operator and avoiding scratching the finger.

Then, after the syringe assembly 2000 is sucked with the medical fluid, the syringe assembly 2000 may be inserted into the stationary ring 2100 from the upper portion of the stationary ring 2100. At this time, the fingers (e.g., index finger and middle finger) may pass through the finger loops 2200, respectively, and in addition, the tail portion (e.g., push plate 1210) of the core bar 1200 is pushed by the thumb, and the syringe assembly 2000 is restricted from further downward movement due to the stopper 2300 abutting against the lower portion of the sleeve 1100, so that the syringe assembly 2000 can be stably fixed against falling down when encountering a shaking or uneven ground scene. The thumb can push the core rod 1200 to drive the piston 1300 to move downwards, so that the medicine liquid can be stably and quantitatively pushed out.

In one embodiment, as shown in fig. 1 to 4 (particularly, fig. 4), the limiting member 2300 includes:

a support 2310, the support 2310 being fixedly disposed with the fixing ring 2100;

more than two limiting blocks 2320, wherein more than two limiting blocks 2320 are arranged at the lower part of the supporting piece 2310;

a connecting rod 2330, wherein the connecting rod 2330 connects the supporting member 2310 with more than two limiting blocks 2320, specifically, in this embodiment, as shown in fig. 1, 3 and 4, the lower end of the connecting rod 2330 is indirectly connected to the limiting block 2320 through a connecting block 2350;

wherein, when the syringe assembly 1000 extends into the stationary ring 2100 from the upper portion of the stationary ring 2100, more than two stoppers 2320 can abut the lower portion of the sleeve 1100.

The present embodiment shows a specific structure of the limiting member 2300, and the supporting member 2310 is fixedly disposed with the fixing ring 2100; the connecting rod 2330 connects the supporting member 2310 with more than two limiting blocks 2320, so that the more than two limiting blocks 2320 are indirectly and fixedly connected with the fixed ring 2100, and the syringe assembly 1000 can be limited to continue to move downwards by propping against the lower part of the sleeve 1100 through the more than two limiting blocks 2320, and the syringe assembly 1000 is prevented from falling off.

In one embodiment, as shown in FIG. 3, more than two of the finger loops 2200 are fixedly disposed on the support 2310.

That is, two or more finger loops 2200 are indirectly fixed to the outer side of the stationary ring 2100 through the supporting member 2310.

In one embodiment, the support 2310 includes:

two support blocks 2311 are fixedly disposed on both sides of the fixing ring 2100, specifically, fixedly disposed by welding.

The number of the limiting blocks 2320 is two, and the two limiting blocks 2320 are respectively arranged at the lower parts of the two supporting blocks 2311.

Thus, the stable clamping of the syringe fixing assembly 2000 by fingers and the further stable fixing of the syringe assembly 1000 can be realized by arranging the corresponding finger loops 2200 and the limiting blocks 2320 at two sides of the fixing ring 2100.

In one embodiment, as shown in fig. 4, the limiting member 2300 further includes:

the two limiting blocks 2320 are respectively connected with the two supporting blocks 2311 through the two resetting elements 2340, and the two resetting elements 2340 can drive the two limiting blocks 2320 to move in opposite directions.

Therefore, the two limiting blocks 2320 can be driven to move towards each other by the two reset elements 2340, so that the two limiting blocks 2320 can stably clamp the sleeve and abut against the bottom of the diameter sleeve, and the syringe assembly 1000 can be stably fixed.

In one embodiment, as shown in fig. 4, the reset element 2340 includes:

the sliding block 2341, wherein the sliding block 2341 is connected with the limiting block 2320 through the connecting rod 2330;

a guide bar 2342, the guide bar 2342 being fixedly connected to the support block 2311, the guide bar 2342 passing through the slider 2341 so that the slider 2341 can slide along the guide bar 2342;

a spring 2343, the spring 2343 is sleeved on the guide rod 2342, and the sliding block 2341 moves towards the inner side of the syringe fixing assembly 2000.

Specifically, the spring 2343 may be a compression spring or a tension spring, and in the present utility model, it is preferable to use the compression spring, and in this case, as shown in fig. 4, the spring is disposed at a side of the slider 2341 away from the fixing ring 2100. Thus, in use, the stoppers 2320 may be pulled apart to be placed into the syringe assembly 1000, after which the two stoppers 2320 may be pushed to move toward each other under the pressure of the spring to clamp the syringe assembly 1000 and restrict its downward movement. In the case of a tension spring, the spring is disposed on a side of the slider 2341 near the fixing ring 2100, which will not be described herein.

By the reset element 2340 of the present embodiment, the syringe assembly can be stably clamped and restrained from downward movement.

In one embodiment, more than two guide rods 2342 are provided, and more than two guide rods 2342 are provided in parallel.

When only one guide bar 2342 is provided, there is a problem in that the slider 2341 rotates around the guide bar 2342. Thereby causing the stopper 2320 to be unstable in fixation.

In this embodiment, more than two guide rods 2342 are provided in parallel, so that the slider 2341 can be restricted from rotating around the guide rods 2342. Thereby ensuring that stopper 2320 may stably limit downward movement of syringe assembly 1000.

According to the quantitative injection device provided by the utility model, the first bulges are arranged in the sleeve, and the clamping positions for clamping the second bulges are formed between every two adjacent first bulges, so that the second bulges can be accurately controlled to move from one clamping position to the other clamping position, the volume of the sucked/pushed liquid medicine can be accurately controlled, quantitative suction/push-out of the liquid medicine can be realized, the use of the liquid medicine can be saved, and the quantitative injection can be accurately performed. In particular, when the fixed syringe component is further arranged in the quantitative injection device, the fixed syringe component can be stably fixed when the quantitative injection device is used, the syringe component is prevented from falling off, and the medicine liquid can be stably and quantitatively pushed out.

Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims (10)

1. A quantitative injection device, comprising:

a syringe assembly, the syringe assembly comprising:

a sleeve;

the core rod has one end extending into the sleeve;

the piston is arranged at one end of the core rod, which extends into the sleeve;

the sleeve comprises a plurality of first bulges, wherein each first bulge is annular and is arranged on the inner wall of the sleeve along the circumferential direction of the sleeve, and the first bulges are arranged along the length direction of the sleeve; and, in addition, the processing unit,

the piston can be caught by any adjacent two of the first protrusions.

2. A quantitative injection device according to claim 1, wherein,

the piston comprises more than one second bulge, and the second bulge is annular and is arranged on the outer periphery side of the piston along the circumferential direction of the piston;

the second protrusions can be clamped between any two adjacent first protrusions.

3. A quantitative injection device according to claim 1, wherein,

the syringe assembly further comprises a needle assembly comprising:

the fixed seat is spliced with the sleeve;

the needle head is fixedly arranged with the fixing seat.

4. A quantitative injection device according to claim 1, wherein,

also included is a syringe retaining assembly comprising:

the fixing ring can be sleeved outside the sleeve;

more than two finger-rings are directly/indirectly fixed on the outer side of the fixed ring;

and the limiting part is fixedly connected with the fixed ring, and can prop against the lower part of the sleeve when the syringe assembly stretches into the fixed ring from the upper part of the fixed ring.

5. A quantitative injection device according to claim 4, wherein,

the limiting member includes:

the support piece is fixedly arranged with the fixed ring;

more than two limiting blocks are arranged at the lower part of the supporting piece;

the connecting rod is connected with the supporting piece and more than two limiting blocks;

when the injector component stretches into the fixing ring from the upper part of the fixing ring, more than two limiting blocks can prop against the lower part of the sleeve.

6. A quantitative injection device according to claim 5, wherein,

more than two finger loops are fixedly arranged on the supporting piece.

7. A quantitative injection device according to claim 5, wherein,

the support includes:

the two support blocks are fixedly arranged on two sides of the fixing ring;

the limiting blocks are two, and the two limiting blocks are respectively arranged at the lower parts of the two supporting blocks.

8. A quantitative injection device according to claim 7, wherein,

the limiting member further includes:

the two limiting blocks are connected with the two supporting blocks through the two limiting blocks respectively, and the two limiting blocks can be driven to move oppositely by the two limiting blocks.

9. A quantitative injection device according to claim 8, wherein,

the reset element includes:

the sliding block is connected with the limiting block through the connecting rod;

the guide rod is fixedly connected with the supporting block, and the guide rod penetrates through the sliding block so that the sliding block can slide along the guide rod;

and the spring is sleeved on the guide rod so as to enable the sliding block to move towards the inner side of the injector fixing assembly.

10. A quantitative injection device according to claim 9, wherein,

the guide rods are arranged in more than two, and the guide rods are arranged in parallel.