Dental medical injector

Abstract

The utility model discloses a dental medical injector, which relates to the technical field of medical injectors and comprises a tube barrel, an auxiliary supporting rod, a piston rod, a fixing ring, a pressing plate, a needle cylinder, a needle head, a rotating component, a fixing component, a clamping component, a small limiting block, a sealing ring and an L-shaped connecting rod. The inner wall of the pipe barrel and the piston rod are installed in a sliding mode, and the top of the piston rod and the fixing ring are fixedly installed. Through the arrangement of the rotating assembly, the fixing assembly, the clamping assembly, the small limiting block, the sealing ring and the L-shaped connecting rod, the friction between the fixing assembly and the fixing ring can be reduced through the rotating assembly, the pressing plate can rotate more smoothly, and the pressing plate can rotate more stably and cannot shake through the fixing assembly.

Description

TECHNICAL FIELD

[0001] The utility model relates to medical syringe technical field, concretely relates to a dental medical syringe. BACKGROUND

[0002] The syringe is a kind of common medical appliance, and dentist needs to use the inside of oral cavity when using the syringe, and its operation precision is higher, and the needle part of the existing syringe is mostly adopted the structure of pyramid for the stability of connection, can cause oppression to oral cavity, improves the pain of patient, and the syringe in the inside of oral cavity often causes the phenomenon of liquid leakage due to larger pressure, and based on this, a new dental medical syringe is provided.

[0003] The prior art discloses a dental medical syringe, the needle tip connecting part is the circular truncated cone structure with the tip downward, and the needle tip connecting part is provided with external thread, the needle tip part main body is the circular cone structure with smooth outer surface, and the needle tip part main body is provided with internal thread matched with the external thread in the inside, the top of the outer surface of needle tip part main body is provided with annular groove, the injection needle is provided with mark block, the inner side top of needle tip part protective sleeve is provided with clamping block matched with annular groove, the top surface of push rod handle is provided with recess curved to the inside, the syringe pipe guard plate is the arc-shaped plate with the end downward bending, the utility model has the advantages of simple structure, more stable and convenient connection, more comfortable use, and can alleviate the pain of patient, improve needle application accuracy and stability.

[0004] Although the above-mentioned patent can be connected more stably and conveniently, used more comfortably, alleviate the pain of patient, improve needle application accuracy and stability, but the needle head cannot be stored and protected, and the needle head is damaged due to collision or external force during production and transportation. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a dental medical syringe to solve the problems in the above background.

[0006] To solve the above technical problems, the utility model adopts the technical scheme of:

[0007] The utility model discloses a dental syringe, including the cylinder, auxiliary support, piston rod, fixed ring, presser plate, needle cylinder, needle, rotating assembly, fixed assembly, joint assembly, limit piece, seal ring and L -shaped link, both sides of the cylinder surface are fixedly installed with auxiliary support, the inner wall of cylinder is slidably installed with piston rod, the top of piston rod is fixedly installed with fixed ring, the inner wall of fixed ring is rotatably installed with presser plate, the bottom of cylinder is fixedly installed with needle cylinder, the bottom of needle cylinder is movably installed with needle, the inner wall of fixed ring is provided with rotating assembly, and the rotating assembly can make presser plate rotate more smoothly and reduce friction, the inner wall of fixed ring is provided with fixed assembly, the fixed assembly can reinforce presser plate, so that it does not fall off when using, and the bottom of needle cylinder is provided with joint assembly, and the joint assembly can realize the quick joint of needle and needle cylinder.

[0008] The further improvement of the technical scheme of the utility model lies in that the rotating assembly comprises a fixed plate and balls, the fixed plate is fixedly installed at the bottom of the inner wall of the fixed ring, the balls are provided in groups, the balls in groups are movably installed at the bottom of the inner wall of the fixed ring in a ring shape, and the balls are located at the outer side of the fixed plate.

[0009] By adopting the above technical scheme, the fixed plate can position the balls, so that the balls can rotate and arrange in order when rotating, the balls can make the rotating block rotate more smoothly and silkily, and the friction between the rotating block and the fixed ring can be reduced.

[0010] The further improvement of the technical scheme of the utility model lies in that the fixed assembly comprises a limiting ring and a rotating block, the limiting ring is fixedly installed at the bottom of the inner wall of the fixed ring, the rotating block is fixedly installed at the bottom of the presser plate, the limiting ring and the rotating block are slidably installed, the rotating block is movably installed at the bottom of the ball, and the rotating block is slidably installed with the fixed ring.

[0011] By adopting the above technical scheme, the limiting ring can reinforce the rotating block, so that the rotating block can rotate more stably and will not shake, and the rotating block can make the presser plate have a rotating function and improve the fitting degree of the presser plate and the user's thumb.

[0012] The further improvement of the technical scheme of the utility model lies in that the joint assembly comprises a special-shaped groove and a fixed block, the special-shaped groove is formed in the inner wall of the needle cylinder, the fixed block is fixedly installed at the top of the surface of the needle, and the needle is movably connected with the needle cylinder through the fixed block and the special-shaped groove.

[0013] By adopting the above technical scheme, the special-shaped groove can make the fixed block tightly clamp, improve the practicability and installation speed of the needle, and the cooperation of the fixed block and the needle can have a joint effect, so that the needle can be installed more conveniently.

[0014] The further improvement of the utility model technical scheme lies in that the plurality of groups of limiting small blocks are fixedly installed in the special-shaped groove of the inner wall of the needle cylinder.

[0015] By the above technical scheme, the limiting small block can limit the fixing block, so that the fixing block rotates within a specified range, and the over-rotation affecting disassembly does not occur.

[0016] The further improvement of the utility model technical scheme lies in that the sealing ring is fixedly installed at the bottom of the needle cylinder, and the sealing ring is located at the connecting position of the needle and the needle cylinder.

[0017] By the above technical scheme, the sealing ring can seal the connecting position of the needle and the needle cylinder, so that the medicine does not leak, and the toughness of the sealing ring can be extruded by the needle and a downward force is given to the fixing block, so that the needle can be clamped more tightly and the sealing property is improved.

[0018] The further improvement of the utility model technical scheme lies in that the L-shaped connecting rod is provided with two groups, and the bottom of the needle is fixedly installed with the two groups of L-shaped connecting rods.

[0019] By the above technical scheme, the L-shaped connecting rod can clamp the needle and the needle cylinder when the needle is turned over, and the needle is inserted into the inner wall of the needle cylinder, so that the hard shell of the needle cylinder protects and stores the needle.

[0020] By the above technical scheme, the utility model has the following technical progress compared with the prior art:

[0021] 1. The utility model provides a dental medical injector, through the setting of the rotating assembly, the fixing assembly, the clamping assembly, the limiting small block, the sealing ring and the L-shaped connecting rod, the rotating assembly can reduce the friction between the fixing assembly and the fixing ring and make the pressing plate rotate more smoothly, the fixing assembly can make the pressing plate rotate more stably and not shake, the cooperation of the clamping assembly, the limiting small block and the L-shaped connecting rod can realize the positive and negative clamping of the needle, so that the needle can be efficiently used and stored, the sealing ring can seal the gap between the needle and the needle cylinder and make the clamping more firm, and through the cooperation of the rotating assembly, the fixing assembly, the clamping assembly, the limiting small block, the sealing ring and the L-shaped connecting rod, the problem that the needle is damaged due to collision or external force during production and transportation in the background art is solved.

[0022] 2, the utility model provides a dental medical injector, through the setting of fixed plate and ball, make fixed plate can limit ball, make it can orderly rotate and arrange when rotating, prevent its misplacement and irregular situation, ball can make the rotating block rotate more smooth and silky, can reduce the friction between the fixed ring and rotation at the same time.

[0023] 3, the utility model provides a dental medical injector, through the setting of limiting ring and rotating block, make limiting ring can consolidate rotating block make it more stable when rotating, will not appear to shake, rotating block can make press plate have rotation function, improve press plate and user's thumb's fitting degree. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is the front view structure schematic drawing of the utility model;

[0025] Figure 2 It is the needle cylinder section view structure schematic drawing of the utility model;

[0026] Figure 3 It is the fixed ring section view explosion structure schematic drawing of the utility model;

[0027] Figure 4 It is the utility model Figure 2 It is the enlarged structure schematic drawing of A place in the utility model;

[0028] Figure 5 It is the enlarged structure schematic drawing of B place in the utility model; Figure 3

[0029] In the drawing: 1, tube; 2, auxiliary strut; 3, piston rod; 4, fixed ring; 5, press plate; 6, needle cylinder; 7, needle; 8, rotation assembly; 81, fixed plate; 82, ball; 9, fixed assembly; 91, limiting ring; 92, rotating block; 10, clamping assembly; 101, special-shaped slot; 102, fixed block; 110, limiting small block; 120, sealing ring; 130, L-shaped connecting rod. DETAILED DESCRIPTION

[0030] The utility model will be further explained in detail in connection with example:

[0031] Example 1

[0032] As Figures 1-5 ​The utility model provides a kind of dental medical injector, including barrel 1, auxiliary strut 2, piston rod 3, fixed ring 4, press plate 5, needle cylinder 6, needle 7, rotating assembly 8, fixed assembly 9, clamping assembly 10, limit small block 110, sealing ring 120 and L-shaped connecting rod 130, the both sides of barrel 1 surface are fixedly installed with auxiliary strut 2, the inner wall of barrel 1 is slidably installed with piston rod 3, the top of piston rod 3 is fixedly installed with fixed ring 4, the inner wall of fixed ring 4 is rotatably installed with press plate 5, the bottom of barrel 1 is fixedly installed with needle cylinder 6, the bottom of needle cylinder 6 is movably installed with needle 7, the inner wall of fixed ring 4 is provided with rotating assembly 8, rotating assembly 8 can make press plate 5 more smoothly rotate and reduce friction, rotating assembly 8 includes fixed plate 81 and ball 82, fixed plate 81 is fixedly installed at the bottom of the inner wall of fixed ring 4, ball 82 is provided with several groups, and several groups of ball 82 are movably installed in the bottom of the inner wall of fixed ring 4 in annular shape, ball 82 is located at the outside of fixed plate 81, the inner wall of fixed ring 4 is provided with fixed assembly 9, fixed assembly 9 can reinforce press plate 5, so that it does not fall off when being used, fixed assembly 9 includes limit ring 91 and rotating block 92, limit ring 91 is fixedly installed at the bottom of the inner wall of fixed ring 4, rotating block 92 is fixedly installed at the bottom of press plate 5, limit ring 91 is slidably installed with rotating block 92, rotating block 92 bottom is movably installed with ball 82, rotating block 92 is slidably installed with fixed ring 4, the bottom of needle cylinder 6 is provided with clamping assembly 10, clamping assembly 10 can realize the quick clamping of needle 7 and needle cylinder 6, clamping assembly 10 includes special-shaped groove 101 and fixed block 102, special-shaped groove 101 is opened in the inner wall of needle cylinder 6, fixed block 102 is fixedly installed at the top of needle 7 surface, needle 7 is movably clamped with needle cylinder 6 by fixed block 102 and special-shaped groove 101.

[0033] In the embodiment, through the arrangement of the rotating assembly 8, the fixing assembly 9, the clamping assembly 10, the limiting small block 110, the sealing ring 120 and the L-shaped connecting rod 130, the rotating assembly 8 can reduce the friction between the fixing assembly 9 and the fixing ring 4 and make the pressing plate 5 rotate more smoothly, the fixing assembly 9 can make the pressing plate 5 rotate more stably and not shake, the cooperation of the clamping assembly 10, the limiting small block 110 and the L-shaped connecting rod 130 can realize the forward and reverse clamping of the needle 7, the sealing ring 120 can seal the gap between the needle 7 and the needle cylinder 6 and make the clamping more firm, the fixing plate 81 can limit the rolling ball 82, so that the rolling ball 82 can rotate and arrange in order, and the rolling ball 82 can make the rotating block 92 rotate more smoothly and reduce the friction between the rotating block 92 and the fixing ring 4 when rotating, the limiting ring 91 can reinforce the rotating block 92 and make the rotating block 92 rotate more stably and not shake, and the rotating block 92 can make the pressing plate 5 have the rotating function and improve the fitting degree of the pressing plate 5 and the user's thumb, the special-shaped groove 101 is arranged, the fixing block 102 can be clamped tightly, the practicability and the installation speed of the needle 7 are improved, and the cooperation of the fixing block 102 and the needle 7 can have the clamping effect and make the needle 7 more portable.

[0034] Embodiment 2

[0035] As Figures 1-5 shown, on the basis of the embodiment 1, the utility model provides a technical scheme: preferably, the limiting small block 110 is provided with a plurality of groups, the special-shaped groove 101 in the inner wall of the needle cylinder 6 is fixedly installed with a plurality of groups of limiting small blocks 110, the sealing ring 120 is fixedly installed at the bottom of the needle cylinder 6, the sealing ring 120 is located at the connecting place of the needle 7 and the needle cylinder 6, the L-shaped connecting rod 130 is provided with two groups, and the bottom of the needle 7 is fixedly installed with the two groups of L-shaped connecting rods 130.

[0036] In the embodiment, the limiting small block 110 can limit the fixing block 102, so that the fixing block 102 rotates within a specified range and does not excessively rotate to affect disassembly, the sealing ring 120 can seal the connecting place of the needle 7 and the needle cylinder 6, so that the medicine does not leak, meanwhile, the toughness of the sealing ring 120 can be extruded by the needle 7 and give a downward force to the fixing block 102, so that the needle 7 can be clamped more tightly and the sealing property is improved, and the L-shaped connecting rod 130 can make the needle 7 be clamped with the needle cylinder 6 when being turned over, and the needle 7 is inserted into the inner wall of the needle cylinder 6 to be protected and stored by the hard shell of the needle cylinder 6.

[0037] The working principle of the dental injector will be described in detail below.

[0038] As Figures 1-5As shown, when the utility model is used, the user first inserts the needle 7 into the inner wall of the needle cylinder 6 from the special-shaped groove 101 opened at the bottom of the needle cylinder 6, then gently rotates the needle 7 to make the fixed block 102 rotate, when the fixed block 102 rotates, it will collide with the limiting small block 110 with a click, which represents that the needle 7 has been installed in place, then the user inserts the drug suction pipe cylinder 1 into the inner wall, and uses it, when the user's thumb contacts the pressing plate 5, it will rotate according to the direction and chirality of the user's thumb to adjust, to ensure that the pressing plate 5 can completely match the user's thumb, so that it is more convenient to use, after use, first sterilize or replace the needle 7, turn over the needle 7, insert the needle 7 into the inner wall of the needle cylinder 6, then rotate the needle 7 to clamp the L-shaped connecting rod 130 on the inner wall of the needle cylinder 6, which can not easily harm the user during transportation or taking, to ensure the safety during use, and realize the storage function.

[0039] The above has made a detailed description of the utility model in general, but some modifications or improvements can be made on the basis of the utility model, which is obvious to those skilled in the art. Therefore, the modifications or improvements without departing from the spirit of the utility model are within the protection scope of the utility model.

Claims

1. A dental syringe comprising a barrel (1), an auxiliary support rod (2), a piston rod (3), a fixed ring (4), a pressing plate (5), a needle barrel (6), a needle (7), a rotating assembly (8), a fixed assembly (9), a clamping assembly (10), a limiting block (110), a sealing ring (120) and an L-shaped connecting rod (130), characterized in that: The both sides of the surface of the pipe cylinder (1) are fixedly installed with auxiliary supporting rods (2), the inner wall of the pipe cylinder (1) is slidably installed with a piston rod (3), the top of the piston rod (3) is fixedly installed with a fixed ring (4), the inner wall of the fixed ring (4) is rotatably installed with a pressing plate (5), the bottom of the pipe cylinder (1) is fixedly installed with a needle cylinder (6), the bottom of the needle cylinder (6) is movably installed with a needle head (7), the inner wall of the fixed ring (4) is provided with a rotating assembly (8), the rotating assembly (8) can make the pressing plate (5) rotate more smoothly and reduce friction, the inner wall of the fixed ring (4) is provided with a fixing assembly (9), the fixing assembly (9) can reinforce the pressing plate (5), so that it will not fall off during use, the bottom of the needle cylinder (6) is provided with a clamping assembly (10), and the clamping assembly (10) can realize the quick clamping of the needle head (7) and the needle cylinder (6).

2. A dental syringe according to claim 1, wherein: The rotating assembly (8) comprises a fixed plate (81) and a plurality of groups of ball bearings (82), the fixed plate (81) is fixedly installed at the bottom of the inner wall of the fixed ring (4), and the plurality of groups of ball bearings (82) are annularly movably installed at the bottom of the inner wall of the fixed ring (4).

3. A dental syringe according to claim 2, wherein: The fixing assembly (9) comprises a limiting ring (91) and a rotating block (92), the limiting ring (91) is fixedly installed at the bottom of the inner wall of the fixed ring (4), the rotating block (92) is fixedly installed at the bottom of the pressing plate (5), the limiting ring (91) and the rotating block (92) are slidably installed, the rotating block (92) is movably installed at the bottom of the ball bearing (82), and the rotating block (92) is slidably installed with the fixed ring (4).

4. The dental syringe of claim 1 wherein: The clamping assembly (10) comprises a special-shaped groove (101) and a fixed block (102), the special-shaped groove (101) is formed in the inner wall of the needle cylinder (6), and the fixed block (102) is fixedly installed at the top of the surface of the needle head (7).

5. A dental syringe according to claim 4, wherein: The limiting small blocks (110) are provided in a plurality of groups, and the special-shaped groove (101) in the inner wall of the needle cylinder (6) is fixedly installed with the plurality of groups of limiting small blocks (110).

6. A dental syringe according to claim 1, wherein: The sealing ring (120) is fixedly installed at the bottom of the needle cylinder (6), and the sealing ring (120) is located at the connection position of the needle head (7) and the needle cylinder (6).

7. A dental syringe according to claim 1, wherein: The L-shaped connecting rods (130) are provided in two groups, and the bottom of the needle head (7) is fixedly installed with the two groups of L-shaped connecting rods (130).

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