Precise injector with lock for preparing gas standard substance

Abstract

The utility model discloses a precise injector with a lock for preparing a gas standard substance, which comprises a main body component, a locking component, a locking component and a locking component, and the main body component comprises a needle cylinder and a rear end cover; the limiting assembly comprises a fixing frame, a connecting shaft, a torsional spring, a supporting rod, a first through hole, a second through hole, a sliding block, a locking rod, a first connecting rod and an arc-shaped limiting plate; the fixing frame is connected to the side edge of the rear end cover, the connecting shaft is fixed to the inner side of the fixing frame, the connecting shaft is sleeved with the torsional spring, one end of the supporting rod is sleeved with the connecting shaft, one end of the torsional spring is fixed to the connecting shaft, the other end of the torsional spring is fixed to the supporting rod, the first through hole is formed in the middle of the supporting rod, and the second through hole is formed in the side edge of the first through hole. The utility model relates to a precise injector, and aims to solve the problems that when an existing precise injector is used, a piston is accidentally moved due to misoperation, so that on one hand, the proportion of a gas mixture is inaccurate, the standard concentration of prepared gas is influenced, and on the other hand, the gas preparation efficiency is also influenced.

Description

Technical Field

[0001] The utility model relates to the technical field of syringes, in particular to a locked precision syringe for preparing gas standard substances. Background Art

[0002] A syringe is a medical device used to inject liquid medicines. It is mainly composed of a barrel, a piston, a push rod and a needle. The precision syringe with a lock used to prepare gas standard substances is used to accurately extract and inject a specific amount of gas or liquid. In the process of preparing gas standard substances, this syringe plays a vital role because it can accurately control and adjust the proportion of various gas components to produce the required standard gas mixture.

[0003] When using existing precision syringes, the piston may be accidentally moved due to misoperation, which will not only lead to inaccurate proportions of the gas mixture, thereby affecting the standard concentration of the prepared gas, but also affect the gas preparation efficiency. Utility Model Content

[0004] The purpose of the utility model is to provide a locked precision syringe for preparing gas standard substances, so as to solve the problem raised in the above-mentioned background technology that the existing precision syringes may accidentally move the piston due to misoperation when in use, which will lead to inaccurate proportions of the gas mixture on the one hand, thereby affecting the standard concentration of the prepared gas, and on the other hand, will also affect the gas preparation efficiency.

[0005] In order to solve the above technical problems, the utility model is realized by the following technical solutions:

[0006] The utility model is a locked precision syringe for preparing gas standard substances, comprising:

[0007] A main body assembly, the main body assembly comprising a syringe and a rear end cover;

[0008] The rear end cover is clamped on one end of the syringe;

[0009] A limiting assembly, the limiting assembly comprising a fixing frame, a connecting shaft, a torsion spring, a supporting rod, a first through hole, a second through hole, a sliding block, a locking rod, a first connecting rod and an arc-shaped limiting plate;

[0010] The fixing frame is connected to the side of the rear end cover, the connecting shaft is fixed to the inner side of the fixing frame, the torsion spring is sleeved on the connecting shaft, one end of the support rod is sleeved on the connecting shaft, and one end of the torsion spring is fixed on the connecting shaft, and the other end is fixed on the support rod, the first through hole is opened in the middle of the support rod, the second through hole is opened on the side of the first through hole, the slider is slidably connected in the first through hole, one end of the locking rod is welded on the side of the slider, and the locking rod is slidably connected in the second through hole, the first connecting rod is welded on the side of the slider, and the arc-shaped limit plate is welded at the other end of the first connecting rod.

[0011] Furthermore, the limiting assembly also includes a hoop, a first clamping block and a third through hole;

[0012] The clamp is hinged on the side of the fixing frame, the third through hole is arranged on one side of the clamp, the first clamp is welded on the other side of the clamp, and the first clamp is clamped in the third through hole.

[0013] Furthermore, the main body assembly also includes a front end cover and scale lines;

[0014] The front end cover is clamped on an end of the syringe away from the rear end cover, and the scale lines are engraved on the surface of the syringe.

[0015] Furthermore, the main body assembly also includes a push rod and a piston;

[0016] The push rod is inserted in the middle of the rear end cover, and the piston is fixed on one end of the push rod located in the syringe.

[0017] Further, the main body assembly also includes a Luer lock head and a valve;

[0018] The Luer lock head is fixed at the middle part of the front end cover, and the valve is screwed to an end of the Luer lock head away from the front end cover.

[0019] Further, it also includes a connection component;

[0020] The connecting assembly includes a second connecting rod, a second clamping block and a clamping slot;

[0021] The card slot is fixed at one end of the side of the rear end cover, the second connecting rod is welded to the upper end of the fixing frame, the second card block is integrally formed and connected to the side of the second connecting rod, and the second card block is inserted into the card slot.

[0022] Compared with the prior art, the advantages of the present invention are:

[0023] 1. The utility model, through the setting of the limit assembly, the clamp is sleeved on the push rod, the first clamping block is clamped in the third through hole, and the arc limit plate is clamped at the rear end of the push rod. When the push rod is pushed, the arc limit plate is driven to move, the first connecting rod is driven to move, and the slider is driven to move along the first through hole. After the appropriate amount is pushed out, the locking rod in the second through hole is tightened to make the arc limit plate fit to the rear end of the push rod. When the push rod is pushed close to the syringe, the support rod can be rotated around the connecting shaft to turn the arc limit plate out so that the arc limit plate is located outside the push rod, which is convenient for the push rod to continue to push. The arc limit plate is located outside the push rod, which can also avoid the push rod from being pushed by mistake. This arrangement can avoid the push rod from being operated incorrectly and causing measurement errors.

[0024] 2. The utility model has a connecting assembly that is set up. When the push rod pushes the maximum amount into the syringe, the clamp is opened, the second clamping block in the clamping groove is removed, and the fixing frame under the second connecting rod is driven out. This setting can facilitate the push rod to drive the piston to push the last amount into the syringe. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0026] Figure 1 It is a schematic diagram of the overall structure of the utility model from a first perspective;

[0027] Figure 2 It is a schematic diagram of the overall structure of the utility model from a second viewing angle;

[0028] Figure 3 This is a schematic diagram of the structure of the limit assembly of the utility model;

[0029] Figure 4 This is a schematic diagram of the hoop structure of the utility model;

[0030] Figure 5 This is a schematic diagram of the structure of the connection assembly of the utility model.

[0031] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0032] 10. Syringe; 11. Front end cover; 12. Rear end cover; 13. Scale line; 14. Push rod; 15. Piston; 16. Luer lock head; 17. Valve; 20. Fixed frame; 21. Connecting shaft; 22. Torsion spring; 23. Support rod; 24. First through hole; 25. Second through hole; 26. Slider; 260. Locking rod; 27. First connecting rod; 28. Arc-shaped limit plate; 29. ​​Hoop; 290. First clamping block; 291. Third through hole; 30. Second connecting rod; 31. Second clamping block; 32. Clamping slot. DETAILED DESCRIPTION

[0033] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below with reference to the accompanying drawings.

[0034] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific implementation methods disclosed below.

[0035] In order to make the purpose, technical solution and advantages of the present invention more clear, the implementation mode of the present invention will be further described in detail below with reference to the accompanying drawings.

[0036] See also Figure 1-4 The present embodiment is a locked precision syringe for preparing gas standard substances, comprising:

[0037] The main body assembly includes a syringe 10 and a rear end cover 12;

[0038] The rear end cover 12 is clamped on one end of the syringe 10;

[0039] The syringe 10 serves to store the syringe, and the rear end cover 12 serves to connect the syringe.

[0040] The limiting assembly includes a fixing frame 20, a connecting shaft 21, a torsion spring 22, a support rod 23, a first through hole 24, a second through hole 25, a slider 26, a locking rod 260, a first connecting rod 27 and an arc-shaped limiting plate 28;

[0041] The fixing frame 20 is connected to the side of the rear end cover 12, the connecting shaft 21 is fixed to the inner side of the fixing frame 20, the torsion spring 22 is sleeved on the connecting shaft 21, one end of the support rod 23 is sleeved on the connecting shaft 21, and one end of the torsion spring 22 is fixed to the connecting shaft 21, and the other end is fixed to the support rod 23, the first through hole 24 is opened in the middle of the support rod 23, the second through hole 25 is opened on the side of the first through hole 24, the slider 26 is slidably connected in the first through hole 24, one end of the locking rod 260 is welded to the side of the slider 26, and the locking rod 260 is slidably connected in the second through hole 25, the first connecting rod 27 is welded to the side of the slider 26, and the arc-shaped limit plate 28 is welded to the other end of the first connecting rod 27;

[0042] The fixing frame 20 plays a supporting role, the connecting shaft 21 facilitates the rotation of the supporting rod 23, the torsion spring 22 has a reset function, the first through hole 24 facilitates the movement of the slider 26 and plays a limiting role, the second through hole 25 facilitates the movement of the locking rod 260, the first connecting rod 27 plays a connecting role, and the arc-shaped limiting plate 28 plays a limiting role;

[0043] The limiting assembly further includes a hoop 29, a first clamping block 290 and a third through hole 291;

[0044] The hoop 29 is hinged to the side of the fixing frame 20, the third through hole 291 is opened on one side of the hoop 29, the first clamping block 290 is welded to the other side of the hoop 29, and the first clamping block 290 is clamped in the third through hole 291;

[0045] The hoop 29 serves as a limiter to prevent the arc-shaped limiter plate 28 from deviating, and the first clamping block 290 and the third through hole 291 serve as a connection.

[0046] The main body assembly also includes a front end cover 11 and a scale line 13;

[0047] The front end cover 11 is clamped on the end of the syringe 10 away from the rear end cover 12, and the scale line 13 is engraved on the surface of the syringe 10;

[0048] The front end cover 11 plays a connecting role, and the scale line 13 plays a positioning role;

[0049] The main assembly also includes a push rod 14 and a piston 15;

[0050] The push rod 14 is inserted in the middle of the rear end cover 12, and the piston 15 is fixed to one end of the push rod 14 located in the syringe 10;

[0051] The push rod 14 is used to push the piston 15, and the piston 15 plays a sealing role;

[0052] The main assembly also includes a Luer lock head 16 and a valve 17;

[0053] The Luer lock head 16 is fixed to the middle of the front end cover 11, and the valve 17 is screwed to the end of the Luer lock head 16 away from the front end cover 11;

[0054] The Luer lock head 16 is used to connect the pipeline, and the valve 17 can control the opening and closing of the syringe.

[0055] Working principle:

[0056] The hoop 29 is sleeved on the push rod 14, the first clamping block 290 is clamped in the third through hole 291, and the arc-shaped limit plate 28 is clamped at the rear end of the push rod 14. When the push rod 14 is pushed, the arc-shaped limit plate 28 is driven to move, the first connecting rod 27 is driven to move, and the slider 26 is driven to move along the first through hole 24. After the push rod 14 is pushed out to a suitable amount, the locking rod 260 in the second through hole 25 is tightened to make the arc-shaped limit plate 28 fit the rear end of the push rod 14;

[0057] When the push rod 14 is pushed close to the syringe 10, the support rod 23 can be rotated around the connecting shaft 21 to turn the arc-shaped limit plate 28 out so that the arc-shaped limit plate 28 is located outside the push rod 14, which is convenient for the push rod 14 to continue pushing. The arc-shaped limit plate 28 is located outside the push rod 14, which can also avoid accidental operation of the push rod 14.

[0058] This step can avoid misoperation of the push rod 14, which may cause measurement errors.

[0059] See also Figure 5 This embodiment is based on the above embodiment 1 and further includes:

[0060] A connecting assembly, the connecting assembly includes a second connecting rod 30, a second clamping block 31 and a clamping slot 32;

[0061] The card slot 32 is fixed to one end of the side of the rear end cover 12, the second connecting rod 30 is welded to the upper end of the fixing frame 20, the second card block 31 is integrally formed and connected to the side of the second connecting rod 30, and the second card block 31 is inserted into the card slot 32;

[0062] The second connecting rod 30 plays a connecting role, and the second clamping block 31 and the clamping slot 32 play a connecting role.

[0063] Working principle:

[0064] When the push rod 14 is pushed into the syringe 10 to the maximum extent, the clamp 29 is opened, and the second clamping block 31 in the clamping groove 32 is removed, so as to move the fixing frame 20 under the second connecting rod 30 out.

[0065] This step can facilitate the push rod 14 to drive the piston 15 to push the last amount of liquid in the syringe 10.

[0066] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" 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 a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0067] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A locked precision syringe for preparing gas standard substances, characterized in that: include: A main body assembly, the main body assembly comprising a syringe (10) and a rear end cover (12); The rear end cover (12) is clamped on one end of the syringe (10); A limiting assembly, the limiting assembly comprising a fixing frame (20), a connecting shaft (21), a torsion spring (22), a supporting rod (23), a first through hole (24), a second through hole (25), a sliding block (26), a locking rod (260), a first connecting rod (27) and an arc-shaped limiting plate (28); The fixing frame (20) is connected to the side of the rear end cover (12), the connecting shaft (21) is fixed to the inner side of the fixing frame (20), the torsion spring (22) is sleeved on the connecting shaft (21), one end of the support rod (23) is sleeved on the connecting shaft (21), and one end of the torsion spring (22) is fixed to the connecting shaft (21), and the other end is fixed to the support rod (23), the first through hole (24) is opened in the middle of the support rod (23), the second through hole (25) is opened on the side of the first through hole (24), the slider (26) is slidably connected in the first through hole (24), one end of the locking rod (260) is welded to the side of the slider (26), and the locking rod (260) is slidably connected in the second through hole (25), the first connecting rod (27) is welded to the side of the slider (26), and the arc-shaped limiting plate (28) is welded to the other end of the first connecting rod (27).

2. A locked precision syringe for preparing gas standard substances according to claim 1, characterized in that: The limiting assembly also includes a hoop (29), a first clamping block (290) and a third through hole (291); The hoop (29) is hinged on the side of the fixing frame (20), the third through hole (291) is opened on one side of the hoop (29), the first clamping block (290) is welded on the other side of the hoop (29), and the first clamping block (290) is clamped in the third through hole (291).

3. A locked precision syringe for preparing gas standard substances according to claim 1, characterized in that: The main body assembly also includes a front end cover (11) and a scale line (13); The front end cover (11) is clamped on one end of the syringe (10) away from the rear end cover (12), and the scale line (13) is engraved on the surface of the syringe (10).

4. A locked precision syringe for preparing gas standard substances according to claim 1, characterized in that: The main body assembly also includes a push rod (14) and a piston (15); The push rod (14) is inserted into the middle of the rear end cover (12), and the piston (15) is fixed to one end of the push rod (14) located in the syringe (10).

5. A locked precision syringe for preparing gas standard substances according to claim 3, characterized in that: The main body assembly also includes a Luer lock head (16) and a valve (17); The Luer lock head (16) is fixed to the middle part of the front end cover (11), and the valve (17) is screwed to the end of the Luer lock head (16) away from the front end cover (11).

6. A locked precision syringe for preparing gas standard substances according to claim 1, characterized in that: Also included are connection components; The connecting assembly comprises a second connecting rod (30), a second clamping block (31) and a clamping slot (32); The card slot (32) is fixed to one end of the side of the rear end cover (12), the second connecting rod (30) is welded to the upper end of the fixing frame (20), the second card block (31) is integrally formed and connected to the side of the second connecting rod (30), and the second card block (31) is inserted into the card slot (32).

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