CN210813160U

CN210813160U - Quantitative injector

Info

Publication number: CN210813160U
Application number: CN201921447893.9U
Authority: CN
Inventors: 童林
Original assignee: Jiangxi University of Technology
Current assignee: Jiangxi University of Technology
Priority date: 2019-09-03
Filing date: 2019-09-03
Publication date: 2020-06-23
Anticipated expiration: 2029-09-03

Abstract

The utility model relates to the technical field of medical equipment, in particular to a quantitative injector, which comprises a cylinder body, a piston rod, a piston handle and a quantitative device, wherein the piston, the piston rod, the piston handle and the quantitative device are matched with the inner wall of the cylinder body to slide; the quantifying device comprises a quantifying seat and a quantifying strip, the quantifying seat is connected with the outer wall of the cylinder, the quantifying strip is of a square strip-shaped structure, latch teeth are arrayed on the front wall of the quantifying seat, the top portions of the quantifying seat and the side wall of the piston handle are connected, the quantifying seat is provided with quantifying holes which are arranged along the direction of the cylinder and are used for the quantifying strip to pass through, and the quantifying seat is internally provided with a limiting mechanism used for limiting the quantifying strip to move. The utility model discloses can realize the syringe and inject the ration of liquid medicine.

Description

Quantitative injector

Technical Field

The utility model relates to the technical field of medical equipment, especially, relate to a quantitative injector.

Background

Syringes are a common medical device. As early as the 15 th century, kathler, italian, proposed the principle of the syringe. Gas or liquid is primarily drawn or injected with a needle.

The injection amount of the liquid is manually judged through scales on the injection tube, the accuracy of the injection amount is not high, the injection amount is greatly influenced by human factors, and the injection amount is easily pushed to pass through the head, so that the disposable injection amount is overlarge, and medical accidents are possibly caused.

Based on the above consideration, the utility model designs a quantitative injector.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome prior art not enough, provide a quantitative injector, can realize the syringe to the quantitative injection of liquid medicine.

In order to realize the utility model discloses a purpose, the utility model discloses a technical scheme do:

the utility model discloses a quantitative injector, which comprises a cylinder body, a piston matched with the inner wall of the cylinder body to slide, a piston rod, a piston handle and a quantitative device, wherein one end of the piston rod is connected with the piston, and the other end of the piston rod is connected with the piston handle; the quantifying device comprises a quantifying seat and a quantifying strip, the quantifying seat is connected with the outer wall of the cylinder, the quantifying strip is of a square strip-shaped structure, latch teeth are arrayed on the front wall of the quantifying seat, the top portions of the quantifying seat and the side wall of the piston handle are connected, the quantifying seat is provided with quantifying holes which are arranged along the direction of the cylinder and are used for the quantifying strip to pass through, and the quantifying seat is internally provided with a limiting mechanism used for limiting the quantifying strip to move.

The quantitative seat is of an L-shaped structure consisting of a transverse block and a longitudinal block, and the transverse block is provided with a connecting hole which is sleeved on the outer wall of the opening of the cylinder body; the longitudinal block is of a square structure, and the quantifying holes penetrate through the top wall and the bottom wall of the quantifying holes.

The latch is vertical section is right triangle's recess, right triangle's first right-angle side does the open end of recess, and the second right-angle side is close to ration strip bottom, its hypotenuse with the contained angle on second right-angle side is 45~ 90.

The limiting mechanism comprises a limiting hole, a limiting block, a pin shaft, a limiting cover plate and a compression spring, wherein the limiting hole is formed in the front wall of the longitudinal block and communicated with the quantitative hole, the limiting block is arranged in the limiting hole, the pin shaft is fixed above the side wall of the limiting hole, the limiting block is of a square structure, a clamping block matched and clamped with the clamping teeth is arranged on the inner wall of the limiting block, and a pin shaft hole for sleeving the pin shaft is formed above the side wall of the limiting block; the limiting cover plate comprises a cover plate and a limiting plate, the cover plate is used for being inserted into the limiting hole, the cover plate is connected with the longitudinal block through a connecting mechanism, the sectional area of the limiting plate is larger than that of the cover plate, one end of the compression spring is connected with the lower portion of the inner wall of the cover plate, and the other end of the compression spring is tightly propped against the outer wall of the limiting block.

One end of the compression spring is connected with the cover plate, the other end of the compression spring is connected with a connecting block which is cylindrical, and a connecting groove matched with the shape of the connecting block is arranged below the outer wall of the limiting block.

The connecting mechanism comprises a first threaded hole formed in the side wall of the cover plate, a second threaded hole formed in the longitudinal block and a fixing bolt, the first threaded hole and the second threaded hole are coaxial, and the fixing bolt is provided with an external thread connected with the first threaded hole and the second threaded hole in a matched threaded manner.

The top end of the quantitative strip is connected with the side wall of the piston handle through a connecting rod, and the connecting rod is connected with the top end of the quantitative strip through a connecting bolt.

The bottom of ration strip is equipped with stop screw, stop screw's cross-section is less than the cross-section of location strip, be equipped with on the stop screw with its outer wall on the external screw thread assorted stop nut.

The beneficial effects of the utility model reside in that:

1. when the utility model is in the initial state, the compression spring is in the initial state, the clamping block is tightly pressed against the limiting block to clamp the clamping block and the clamping teeth, and the bottom wall of the clamping block is tightly pressed against the second right-angle side to ensure that the quantitative strip can not move towards the piston rod; make the piston remove along the barrel when the user presses the piston handle, joint piece moves along the hypotenuse rebound of latch this moment, compresses compression spring gradually, and when slipping the hypotenuse top, compression spring is motion that resets, and the tight stopper in top makes joint piece and adjacent latch block, and the liquid medicine volume of syringe injection is the length on the first right-angle side of latch and the product of barrel cross-sectional area to realize quantitative injection.

Drawings

Fig. 1 is a schematic structural view of the present invention;

fig. 2 is a rear view of the present invention;

FIG. 3 is a cross-sectional view of a portion of the structure of FIG. 2 taken along line A-A in an initial state;

FIG. 4 is a cross-sectional view of a portion of the structure of FIG. 2 taken along line A-A in use;

fig. 5 is a cross-sectional view of the connecting mechanism of the present invention.

In the figure, 1 cylinder, 2 piston rods, 3 piston handles, 4 quantitative seats, 41 quantitative holes, 42 connecting holes, 43 transverse blocks, 44 longitudinal blocks, 5 quantitative strips, 51 latches, 52 second right-angle sides, 53 bevel edges, 6 limiting mechanisms, 61 limiting holes, 62 limiting blocks, 63 pin shafts, 64 limiting cover plates, 65 compression springs, 66 latching blocks, 67 cover plates, 68 limiting plates, 69 connecting blocks, 7 connecting mechanisms, 71 first threaded holes, 72 second threaded holes, 73 fixing bolts, 8 connecting rods, 9 connecting bolts, 10 limiting screws and 11 limiting nuts.

Detailed Description

The invention will be further described with reference to the following figures and examples:

see fig. 1-5.

The utility model discloses a quantitative injector, which comprises a cylinder body 1, a piston matched with the inner wall of the cylinder body 1 to slide, a piston rod 2, a piston handle 3 and a quantitative device, wherein one end of the piston rod 2 is connected with the piston, and the other end is connected with the piston handle 3; the quantitative device comprises a quantitative seat 4 and a quantitative strip 5, the quantitative seat 4 is connected with the outer wall of the cylinder body 1, the quantitative strip 5 is of a square strip structure, latch 51 is arrayed on the front wall of the quantitative strip 5, the tops of the two fixed strips are connected with the side wall of the piston handle 3, a quantitative hole 41 which is formed along the direction of the cylinder body 1 and used for the quantitative strip 5 to pass through is formed in the quantitative seat 4, a limiting mechanism 6 used for limiting the quantitative strip 5 to move is arranged in the quantitative seat 4, and the limiting mechanism 6 is used for limiting the latch 51 on the quantitative strip 5, so that the quantitative injection of the syringe to the liquid medicine is realized.

The quantitative seat 4 is an L-shaped structure formed by a transverse block 43 and a longitudinal block 44, and the transverse block 43 is provided with a connecting hole 42 sleeved on the outer wall of the opening of the cylinder body 1; the longitudinal block 44 is of a square structure, and the quantitative holes 41 penetrate through the top wall and the bottom wall of the quantitative holes 41.

Latch 51 is right triangle's recess for longitudinal section, right triangle's first right-angle side does the open end of recess, second right-angle side 52 are close to 5 bottoms of ration strip, its hypotenuse 53 with the contained angle of second right-angle side 52 is 45~90, ensures that stop gear 6 can restrict 5 direction removal to piston handle 3 of ration strip, and when ration strip 5 can remove towards the direction of keeping away from piston handle 3, stop gear 6 can remove along hypotenuse 53 to make the syringe can normally inject, hypotenuse 53 in this embodiment with the contained angle of second right-angle side 52 is 60.

The limiting mechanism 6 comprises a limiting hole 61 which is arranged on the front wall of the longitudinal block 44 and communicated with the quantitative hole 41, a limiting block 62 which is arranged in the limiting hole 61, a pin shaft 63 which is fixed above the side wall of the limiting hole 61, a limiting cover plate 64 and a compression spring 65, the limiting block 62 is of a square structure, a clamping block 66 which is matched and clamped with the clamping teeth 51 is arranged on the inner wall of the limiting block 62, and a pin shaft hole which is used for sleeving the pin shaft 63 is arranged above the side wall of the limiting block 62; the limiting cover plate 64 comprises a cover plate 67 and a limiting plate 68, the cover plate 67 is used for being inserted into the limiting hole 61, the cover plate 67 is connected with the longitudinal block 44 through a connecting mechanism 7, the sectional area of the limiting plate 68 is larger than that of the cover plate 67, one end of the compression spring 65 is connected with the lower portion of the inner wall of the cover plate 67, the other end of the compression spring is tightly pressed against the outer wall of the limiting block 62, in the initial state, the compression spring 65 is in the initial state, the clamping block 66 is tightly pressed against the limiting block 62 to enable the clamping block 66 to be clamped with the latch 51, and at the moment, the bottom wall of the clamping block 66 is tightly pressed against the second right-; when the user pressed the piston handle 3 and made the piston remove along barrel 1, joint piece 66 moved upwards along hypotenuse 53 of latch 51 this moment, compressed spring 65 compression gradually, when sliding the hypotenuse 53 top, compressed spring 65 was reset motion, and the tight stopper 62 in top makes joint piece 66 and adjacent latch 51 block, and the liquid medicine volume of syringe injection is the length on the first right-angle side of latch 51 and the product of barrel 1 cross-sectional area to realize quantitative injection.

Compression spring 65's one end with apron 67 links to each other, and the other end is connected with and is columniform connecting block 69, the outer wall below of stopper 62 be equipped with connecting block 69 shape assorted spread groove, put into connecting block 69 during the installation in the spread groove, ensure that stopper 62 is rotating the in-process, compression spring 65 can not remove on its outer wall, ensure the work that compression spring 65 can be stable, do not receive the damage.

Connecting mechanism 7 including set up in first screw hole 71 on the apron 67 lateral wall, set up in second screw hole 72 and fixing bolt 73 on the vertical piece 44, first, second screw hole are coaxial, be equipped with on the fixing bolt 73 with first, second screw hole phase-match threaded connection's external screw thread, after apron 67 inserts spacing hole, be connected with second screw hole 72 and first screw hole 71 in proper order through fixing bolt 73 and can fix apron 67, ensure that compression spring 65 can not open the apron 67.

The top end of the quantitative strip 5 is connected with the side wall of the piston handle 3 through a connecting rod 8, and the connecting rod 8 is connected with the top end of the quantitative strip 5 through a connecting bolt 9, so that the quantitative strip is convenient to mount and dismount.

The bottom of ration strip 5 is equipped with stop screw 10, stop screw 10's cross-section is less than the cross-section of location strip 5, when guaranteeing the installation, stop screw 10 can pass quantitative hole 41, be equipped with on stop screw 10 with its outer wall on external screw thread assorted stop nut 11, guarantee through setting up stop nut 11 that the user can not break away from with quantitative hole 41 in the use ration strip 5, stop nut 11's maximum width is greater than the maximum width of ration strip 5.

The above mentioned is only the embodiment of the present invention, not the limitation of the patent scope of the present invention, all the equivalent transformations made by the contents of the specification and the drawings or the direct or indirect application in the related technical field are included in the patent protection scope of the present invention.

Claims

1. A dosing syringe characterized by: the quantitative device comprises a cylinder body (1), a piston rod (2), a piston handle (3) and a quantitative device, wherein the piston slides in a matched manner with the inner wall of the cylinder body (1), one end of the piston rod (2) is connected with the piston, and the other end of the piston rod is connected with the piston handle (3);

the quantifying device comprises a quantifying seat (4) and a quantifying strip (5), the quantifying seat (4) is connected with the outer wall of the cylinder body (1), the quantifying strip (5) is of a square strip-shaped structure, a latch (51) is arranged on the front wall of the quantifying seat, the top of the quantifying strip is connected with the side wall of the piston handle (3), the quantifying seat (4) is provided with a quantifying hole (41) which is arranged along the direction of the cylinder body (1) and is used for the quantifying strip (5) to pass through, and the inside of the quantifying seat (4) is provided with a limiting mechanism (6) which is used for limiting the quantifying strip (5) to move.

2. A dosing syringe according to claim 1, characterised in that: the quantitative seat (4) is of an L-shaped structure consisting of a transverse block (43) and a longitudinal block (44), and a connecting hole (42) which is sleeved on the outer wall of the opening of the barrel body (1) is formed in the transverse block (43); the longitudinal block (44) is of a square structure, and the quantitative holes (41) penetrate through the top wall and the bottom wall of the quantitative holes (41).

3. A dosing syringe according to claim 2, characterised in that: latch (51) are right triangle's recess for longitudinal section, right triangle's first right-angle side does the open end of recess, second right-angle side (52) are close to ration strip (5) bottom, its hypotenuse (53) with the contained angle of second right-angle side (52) is 45~ 90.

4. A dosing syringe according to claim 3, characterised in that: the limiting mechanism (6) comprises a limiting hole (61) which is arranged on the front wall of the longitudinal block (44) and communicated with the quantitative hole (41), a limiting block (62) which is arranged in the limiting hole (61), a pin shaft (63) which is fixed above the side wall of the limiting hole (61), a limiting cover plate (64) and a compression spring (65), the limiting block (62) is of a square structure, a clamping block (66) which is matched and clamped with the clamping teeth (51) is arranged on the inner wall of the limiting block (62), and a pin shaft hole which is used for sleeving the pin shaft (63) is arranged above the side wall of the limiting block (62); spacing apron (64) are including being used for inserting apron (67) and limiting plate (68) of spacing hole (61), apron (67) with vertical piece (44) are connected through coupling mechanism (7), the sectional area of limiting plate (68) is greater than the sectional area of apron (67), the one end of compression spring (65) with the inner wall below of apron (67) links to each other, the other end with stopper (62) outer wall top is tight.

5. A dosing syringe according to claim 4, characterised in that: one end of the compression spring (65) is connected with the cover plate (67), the other end of the compression spring is connected with a connecting block (69) which is cylindrical, and a connecting groove matched with the connecting block (69) in shape is arranged below the outer wall of the limiting block (62).

6. A dosing syringe according to claim 5, characterised in that: the connecting mechanism (7) comprises a first threaded hole (71) formed in the side wall of the cover plate (67), a second threaded hole (72) formed in the longitudinal block (44) and a fixing bolt (73), the first threaded hole and the second threaded hole are coaxial, and an external thread connected with the first threaded hole and the second threaded hole in a matched threaded mode is arranged on the fixing bolt (73).

7. A dosing syringe according to claim 6, characterised in that: the top end of the quantitative strip (5) is connected with the side wall of the piston handle (3) through a connecting rod (8), and the connecting rod (8) is connected with the top end of the quantitative strip (5) through a connecting bolt (9).

8. A dosing syringe according to claim 7, characterised in that: the bottom of ration strip (5) is equipped with stop screw (10), stop screw (10)'s cross-section is less than the cross-section of ration strip (5), be equipped with on stop screw (10) with its outer wall on external screw thread assorted stop nut (11).