CN211798044U - Needleless injector and pressing assembly - Google Patents
Needleless injector and pressing assembly Download PDFInfo
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- CN211798044U CN211798044U CN201921480254.2U CN201921480254U CN211798044U CN 211798044 U CN211798044 U CN 211798044U CN 201921480254 U CN201921480254 U CN 201921480254U CN 211798044 U CN211798044 U CN 211798044U
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Abstract
The utility model discloses a needleless injector and press the subassembly, this injector contains: the barrel, it has the cavity, and one end is for pressing the end, and the other end is the injection end, and is equipped with on its inner wall of pressing the end: the injection end of the first limiting plate is provided with: the inner thread is matched with the outer thread of the ampoule bottle for needleless injection; a piston assembly disposed in the cavity of the barrel, comprising: the piston and the piston rod of fixed connection, be equipped with on this piston rod lateral wall next to its tip: the end part of the piston rod is a conical surface; the pressurizing spring is arranged in the cavity of the cylinder body, sleeved on the piston rod and clamped between the piston and the first limiting plate; the connecting piece is fixed at the pressing end of the cylinder body and is provided with a cavity; and a button assembly fixed to an end of the connection member. The utility model discloses an injection can be realized under less pressing force to the syringe.
Description
Technical Field
The utility model relates to a needleless injector, concretely relates to needleless injector and press the subassembly.
Background
The traditional syringe is an injection mode for injecting medicine into a human body through a stainless steel needle, and the injection mode is easy to cause local skin damage, bleeding, swelling and pain and the like, so that not only is the pain remarkable, but also most patients (especially infants) have fear feeling, and the risk of infection of an injection part is possibly caused.
To solve the problems, the needle-free injection technology (by utilizing the high-pressure jet principle, the liquid medicine forms a thin liquid flow and instantly penetrates through the skin to reach the subcutaneous part, and because of the change of the injection principle, the liquid medicine is dispersed and distributed under the subcutaneous part, the onset time is faster, and the medicine absorption rate is higher) can be completely avoided.
Disclosure of Invention
The utility model aims at providing a needleless injector and press the subassembly, solved the problem that traditional syringe needle injection easily caused local harm, can realize needleless injection through elasticity, and can realize injecting under less pressing force.
In order to achieve the above object, the present invention provides a needleless injector comprising: the barrel, it has the cavity, and one end is for pressing the end, and the other end is the injection end, and is equipped with on its inner wall of pressing the end: the injection end of the first limiting plate is provided with: the inner thread is matched with the outer thread of the ampoule bottle for needleless injection; a piston assembly disposed in the cavity of the barrel, comprising: the piston and the piston rod of fixed connection, be equipped with on this piston rod lateral wall next to its tip: the end part of the piston rod is a conical surface; the pressurizing spring is arranged in the cavity of the cylinder body, sleeved on the piston rod and clamped between the piston and the first limiting plate; the connecting piece is fixed at the pressing end of the cylinder and is provided with a cavity; and a button assembly fixed to an end of the connection member.
Wherein the button assembly comprises: the button body, its lower surface is equipped with: according to the pressure tank, should press the inslot center to be fixed with the support column, the both sides of support column all are equipped with: the rotary tank, the bottom in this rotary tank is equipped with: the long through hole slides, and is equipped with at the tip of this support column: a support plane, which is adjacent to the rotary groove; the supporting spring is sleeved on the supporting column; the hanging plate is symmetrically arranged in the cavity of the connecting piece and is rotationally connected with the inner wall of the cavity of the connecting piece, one end of the hanging plate is provided with a hook, the other end of the hanging plate is provided with a platform surface, the platform surface is attached to the supporting plane, and the hook is used for hanging the conical surface of the piston rod; and the limiting rod is inserted into the sliding long through hole, two ends of the limiting rod are limited on the inner wall of the cavity of the connecting piece, and the supporting spring is positioned above the limiting rod and clamped on the supporting spring.
Preferably, the piston is adapted to the cavity of the barrel.
Preferably, the cavity of the connecting piece is provided with: the first rotating shaft hole and the limiting shaft hole are formed; the hanging plate is provided with: the second rotating shaft hole is connected with the first rotating shaft hole through a shaft pin; the support column is inserted into the sliding long through hole and the limiting shaft hole through the limiting rod and fixedly connected with the sliding long through hole and the limiting shaft hole.
Preferably, the connector comprises: the upper column body and the lower column body are fixedly connected, and the inner diameter and the outer diameter of the upper column body are both smaller than those of the lower column body; the upper column body is matched with the pressing groove of the button body and is inserted into the pressing groove, the limiting rod is inserted into the sliding long through hole, and two ends of the limiting rod are limited on the inner wall of the cavity of the upper column body; and, lower cylinder and barrel looks adaptation, fixed with this barrel.
Preferably, the end face of the pressing end of the cylinder body is provided with a boss structure, and the side wall of the boss structure is symmetrically provided with: mounting grooves and movable grooves; the tip of lower cylinder is equipped with: the lower column body is sleeved on the boss structure, and the buckle key is embedded in the mounting groove; the hanging plates are symmetrically arranged in the cavity of the upper column body and correspond to the movable groove.
Preferably, the pressurizing spring is clamped between the piston and the first limit plate and is in a compressed state.
Preferably, the side wall of the rotary groove adjacent to the support plane has an arc surface.
Preferably, the side wall of the barrel close to the injection end is provided with: add the medicine slot hole, and should add medicine slot hole department and be equipped with: a slideway; the syringe further comprises: the medicine adding buckle is clamped on the slide way of the medicine adding long hole, is clamped on the bottle body piston rod of the ampoule bottle and can move along the slide way.
Preferably, the medicated clasp comprises: a slide button; a connecting rod fixed on the lower surface of the sliding button; the clamping ring is fixed at the end part of the connecting rod and is used for being clamped on a bottle body piston rod of the ampoule bottle; and the clamping groove is fixed on the connecting rod, is positioned between the sliding button and the clamping ring, and is clamped on the slide way of the medicine adding long hole.
The utility model also provides a press the subassembly for needleless injector, should press the subassembly and contain: the button body, its lower surface is equipped with: according to the pressure tank, should press the inslot center to be fixed with the support column, the both sides of support column all are equipped with: the rotary tank, the bottom in this rotary tank is equipped with: the long through hole slides, and is equipped with at the tip of this support column: a support plane; the supporting spring is sleeved on the supporting column; the hanging plate is symmetrically arranged in the cavity of the needleless injector and is rotationally connected with the inner wall of the cavity of the needleless injector, one end of the hanging plate is provided with a hook, the other end of the hanging plate is provided with a platform surface, the platform surface is attached to the supporting plane, and the hook is used for hanging the conical surface of the piston rod; and the limiting rod is inserted into the sliding long through hole, two ends of the limiting rod are limited on the inner wall of the needleless injector, and the supporting spring is positioned above the limiting rod and clamped on the supporting spring.
Preferably, the compression assembly is connected to the needleless injector by a connector; the connecting piece is fixed at the end part of the needleless injector and is provided with a cavity, and the hanging plates are symmetrically arranged in the cavity of the connecting piece and are rotationally connected with the inner wall of the cavity of the connecting piece; and two ends of the limiting rod are limited on the inner wall of the connecting piece.
The utility model discloses a needleless injector and press the subassembly, solved the problem that traditional syringe needle injection easily caused local harm, had following advantage:
(1) the utility model discloses a needleless injector, through the design of button body and gag lever post in the button subassembly, with design turn-trough and slip long through hole on the button body, not only realized sliding and fixed with the connecting piece through slip long through hole and gag lever post, and the gag lever post has realized avoiding the contact of supporting spring and link plate, has improved the life-span of supporting spring, realize spacing to the supporting spring simultaneously, can realize the effect of support to the button body, and the design of turn-trough makes the platform face of link plate easily lose balance, thereby do benefit to the rotatory link plate and release piston assembly, realize the injection;
(2) the needleless injector of the utility model realizes the limit of the hanging plate and blocks the rotation of the hanging plate through the design of the platform surface of the hanging plate and the supporting plane of the button body;
(3) the needleless injector of the utility model, through the design of the hook of the hanging plate and the conical surface of the piston rod, the piston rod is easily hung on the hook of the hanging plate under the action of thrust to realize the pressurization of the pressurization spring, so that the needleless injector is also easily used again by manual pressurization after the needleless injector is used;
(4) the needleless injector of the utility model can conveniently add the medicine through the design of the medicine adding buckle and the medicine adding long hole on the cylinder body, and the medicine adding buckle is easy to replace if damaged.
Drawings
Fig. 1 is a schematic structural view of the needleless injector of the present invention.
Fig. 2 is a perspective view of the needleless injector of the present invention.
Fig. 3 is a schematic structural view of the cylinder of the present invention in one direction.
Fig. 4 is a schematic structural view of the barrel in another direction according to the present invention.
Fig. 5 is a schematic structural diagram of the button body of the present invention.
Fig. 6 is a schematic structural view of the hanging plate of the present invention.
Fig. 7 is a schematic structural diagram of the connecting member of the present invention.
Fig. 8 is a schematic structural diagram of the piston rod of the present invention.
Fig. 9 is a schematic structural view of the medicine adding buckle of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely below, and it should be understood that the described embodiments are only some embodiments of the present invention, but not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
A needleless injector, as shown in fig. 1, which is a schematic structural view of the needleless injector of the present invention, as shown in fig. 2, which is a perspective view of the needleless injector of the present invention, the injector comprises: a cylinder 10, a pressurizing spring 20, a piston assembly 30, a connecting member 40, and a button assembly 50.
Wherein, barrel 10 has the cavity, and one end is for pressing the end, and the other end is the injection end, and is equipped with on its inner wall of pressing the end: the injection end of the first limiting plate is provided with: the inner thread matched with the outer thread of the ampoule bottle 1 for needleless injection (such as the ampoule bottle special for the Yijie needleless injector) can be fixed on the barrel body 10 through the thread.
The piston assembly 30 is disposed in the cavity of the cylinder 10 and includes: the piston 31 and the piston rod 32, which are fixedly connected, may also be made in one piece, and the side wall of the piston rod 32 is provided with, adjacent to its end: a limiting groove, and the end of the piston rod 32 is a conical surface (see fig. 8).
The pressurizing spring 20 is disposed in the cavity of the cylinder 10, and is sleeved on the piston rod 31 and clamped between the piston 31 and the first limit plate.
The connector 40 is fixed to the pressing end of the cartridge 10 and has a cavity.
A button assembly 50 is secured to the end of the connector 40 and includes: button body 51, supporting spring 52, link plate 53 and gag lever post 54. Referring to fig. 5, the lower surface of the button body 51 is provided with: according to the pressure tank, should press the inslot center to be fixed with support column 511, support column 511's both sides all are equipped with: the rotary tank, the bottom in this rotary tank is equipped with: a sliding long through hole, and at the end of the support column 511: a support plane 512, the support plane 512 being adjacent to the rotary slot. The support spring 52 is fitted over the support column 511. Referring to fig. 6, the hanging plate 53 is symmetrically disposed in the cavity of the connecting member 40, and is rotatably connected to the inner wall of the cavity of the connecting member 40, and has a hook 531 at one end thereof and a platform surface 532 at the other end thereof, the platform surface 532 is attached to the supporting plane 512, and the hook 531 is used for hanging the conical surface of the piston rod 32. The gag lever post 54 is planted in the slip slot hole, and both ends are spacing on the cavity inner wall of connecting piece 40, and supporting spring 52 is in its top and block supports on it to prevent button body 51 from droing, and spacing to supporting spring, guarantee pressurized stability, gag lever post 54 has avoided the influence of the great power that link plate 53 and compression spring 20 bore to supporting spring 52 moreover, has improved supporting spring 52's life-span, moreover the utility model discloses a needleless injector only needs less power to press, can release piston assembly 30.
According to an embodiment of the present invention, the piston 31 is adapted to the cavity of the cylinder 10.
According to an embodiment of the present invention, referring to fig. 7, the cavity of the connecting member 40 is provided with: a first rotation shaft hole 421 and a limit shaft hole 411. The hanging plate 53 is provided with: a second rotating shaft hole 533, wherein the second rotating shaft hole 533 is connected with the first rotating shaft hole 421 through a shaft pin; the supporting column 511 is inserted into the sliding long through hole and the limiting shaft hole 411 through the limiting rod 54 and fixedly connected.
According to an embodiment of the present invention, the connecting member 40 includes: the upper column 41 and the lower column 42 which are fixedly connected can be integrally formed, and the inner diameter and the outer diameter of the upper column 41 are both smaller than the inner diameter and the outer diameter of the lower column 42; the upper column 41 is matched with the pressing groove of the button body 51 and is inserted into the pressing groove, the limiting rod 54 is inserted into the sliding long through hole, and two ends of the limiting rod are limited on the inner wall of the cavity of the upper column 41; the lower column 42 is fitted to the cylinder 10 and fixed to the cylinder 10.
According to an embodiment of the present invention, referring to fig. 3 and 4, the end face of the pressing end of the cylinder 10 has a boss structure, and the side wall of the boss structure is symmetrically provided with: an installation groove 12 and a movable groove 13; the end of the lower column 42 is provided with: the lower column body 42 is sleeved on the boss structure, and the buckle key is embedded in the mounting groove 12; the hanging plates 53 are symmetrically arranged in the cavity of the upper column 41 and correspond to the movable groove 13.
According to an embodiment of the present invention, the pressure spring 20 is clamped between the piston 31 and the first limiting plate and is in a compressed state.
According to an embodiment of the present invention, the side wall of the revolving chute adjacent to the supporting plane 512 has a cambered surface, so as to facilitate the easy resetting of the hanging plate 53.
According to the utility model discloses an embodiment, barrel 10 is equipped with along the barrel axial on being close to the lateral wall of injection end: add medicine slot hole 11, and should add medicine slot hole department and be equipped with: a slideway; the syringe further comprises: the medicine adding buckle 60 is clamped on the slide way of the medicine adding long hole 11, is clamped on the bottle body piston rod of the ampoule bottle 1 and can move along the slide way.
According to an embodiment of the present invention, referring to fig. 9, the medicine adding buckle 60 comprises: a slide button 61; a connecting rod 62 fixed to a lower surface of the slide button 61; a snap ring 64 fixed at an end of the connecting rod 62 and adapted to be snapped on a body piston rod of the ampoule bottle 1; and a clamping groove 63 which is fixed on the connecting rod 62 and is positioned between the sliding button 61 and the clamping ring 64, and is clamped on the slide way of the long medicine adding hole 11.
A compression assembly for a needleless injector, the compression assembly comprising: the button body 51, its lower surface is equipped with: according to the pressure tank, should press the inslot center to be fixed with support column 511, support column 511's both sides all are equipped with: the rotary tank, the bottom in this rotary tank is equipped with: a sliding long through hole, and at the end of the support column 511: a support plane 512; a support spring 52, which is sleeved on the support column 511; the hanging plate 53 is symmetrically arranged in the cavity of the needleless injector, is rotatably connected with the inner wall of the cavity of the needleless injector, and is provided with a hook 531 at one end and a platform surface 532 at the other end, the platform surface 532 is attached to the supporting plane 512, and the hook 531 is used for hanging the conical surface of the piston rod 32; and a limiting rod 54 inserted into the sliding long through hole, the two ends of which are limited on the inner wall of the needleless injector, and the supporting spring 52 is positioned above and clamped on the upper part.
According to one embodiment of the present invention, the pressing assembly is connected to the needleless injector via a connector 40; the connecting piece 40 is fixed at the end part of the needleless injector and is provided with a cavity, and the hanging plates 53 are symmetrically arranged in the cavity of the connecting piece 40 and are rotationally connected with the inner wall of the cavity of the connecting piece 40; both ends of the stopper rod 54 are stopped on the inner wall of the connecting member 40.
The utility model discloses a needleless injector's theory of operation specifically as follows:
the button body 51 is pressed with a small force, the button body 51 compresses the support spring 52 provided therein, the stopper rod 54 moves toward the button body 51 along the sliding long through hole, and the button body 51 relatively moves downward along the connecting member 40.
In the downward moving process, the platform surface 532 of the hanging plate 53 moves upward relative to the supporting plane 512 and moves into the rotary grooves at the two sides of the supporting column 511, and because the platform surface 532 of the hanging plate 53 loses the limit of the supporting plane 512, and meanwhile, because the pressurizing spring 20 is in a compression state, a large elastic force is provided for the piston assembly 30, the piston assembly 30 is popped out outwards under the action of the elastic force, and the two hanging plates 53 are propped open, so that the hanging plate 53 rotates relative to the inner wall of the cavity of the connecting piece 40. When the piston assembly 30 is ejected, the piston rod of the bottle body in the ampoule bottle 1 is pushed to inject the medicine, so that the needleless injection is realized.
After the button body 51 is pressed and loosened, the button body 51 automatically resets under the action of the elastic force of the supporting spring 52, so that the button body 51 relatively moves upwards along the connecting piece 40, the hanging plate 53 moves downwards relative to the supporting plane 512 to restore to a state that the platform surface 532 is attached to the supporting plane 512, and the hanging plate 53 rotates to restore to the original position under the action of the supporting plane 512.
Moreover, the medicine adding buckle 60 is clamped on the bottle body piston rod in the ampoule bottle 1 and slides upwards along the slide way of the medicine adding long hole 11, so that the medicine can be sucked, the operation is simple and convenient, and the medicine adding buckle is easy to replace if damaged.
After the device is used, the pressure can be manually pressurized, and the device can also be recycled and used in factories for uniform batch pressure.
When pressurized, a pushing force is applied from the piston 31 to move the piston assembly 30 along the cylinder 10 toward the pressing end thereof, pressing the pressurizing spring 20 to be in a compressed state. The conical surface of the piston rod 32 moves to contact with the hook 531 of the hanging plate 53 and is hung on the hook 531 along the conical surface in a sliding manner, so that pressurization is completed for the next use.
While the present invention has been described in detail with reference to the preferred embodiments thereof, it should be understood that the above description should not be taken as limiting the present invention. Numerous modifications and alterations to the present invention will become apparent to those skilled in the art upon reading the foregoing description. Accordingly, the scope of the invention should be limited only by the attached claims.
Claims (10)
1. A needleless injector, said injector comprising:
barrel (10), it has the cavity, and one end is for pressing the end, and the other end is the injection end, and is equipped with on its inner wall of pressing the end: the injection end of the first limiting plate is provided with: the inner thread is matched with the outer thread of the ampoule bottle (1) for needleless injection;
a piston assembly (30) disposed in the cavity of the barrel (10), comprising: the piston (31) and the piston rod (32) are fixedly connected, and the side wall of the piston rod (32) is provided with the following components adjacent to the end part thereof: the end part of the piston rod (32) is a conical surface;
the pressurizing spring (20) is arranged in the cavity of the cylinder body (10), is sleeved on the piston rod (32) and is clamped between the piston (31) and the first limiting plate;
a connector (40) fixed to a pressing end of the barrel (10) and having a cavity; and a button assembly (50) fixed to an end of the connecting member (40);
wherein the button assembly (50) comprises:
a button body (51) having a lower surface provided with: according to the pressure tank, should press inslot center to be fixed with support column (511), the both sides of support column (511) all are equipped with: the rotary tank, the bottom in this rotary tank is equipped with: a sliding long through hole, and the end of the support column (511) is provided with: a support plane (512), the support plane (512) being proximate to the spin basket;
a support spring (52) sleeved on the support column (511);
the hanging plate (53) is symmetrically arranged in the cavity of the connecting piece (40) and is rotationally connected with the inner wall of the cavity of the connecting piece (40), one end of the hanging plate is provided with a hook (531), the other end of the hanging plate is provided with a platform surface (532), the platform surface (532) is attached to the supporting plane (512), and the hook (531) is used for hanging the conical surface of the piston rod (32); and the limiting rod (54) is inserted into the sliding long through hole, two ends of the limiting rod are limited on the inner wall of the cavity of the connecting piece (40), and the supporting spring (52) is positioned above the limiting rod and clamped on the supporting spring.
2. A needleless injector as claimed in claim 1, wherein the piston (31) is adapted to fit within the cavity of the barrel (10).
3. A needleless injector as claimed in claim 1, wherein the cavity of the connector (40) is provided with: a first rotating shaft hole (421) and a limit shaft hole (411); the hanging plate (53) is provided with: a second rotating shaft hole (533), wherein the second rotating shaft hole (533) is connected with the first rotating shaft hole (421) through a shaft pin; the supporting column (511) is inserted into the sliding long through hole and the limiting shaft hole (411) through a limiting rod (54) and fixedly connected with the sliding long through hole.
4. A needleless injector as claimed in claim 1, wherein the connection member (40) comprises: the upper column body (41) and the lower column body (42) are fixedly connected, and the inner diameter and the outer diameter of the upper column body (41) are both smaller than the inner diameter and the outer diameter of the lower column body (42); the upper column body (41) is matched with the pressing groove of the button body (51) and is inserted into the pressing groove, the limiting rod (54) is inserted into the sliding long through hole, and two ends of the limiting rod are limited on the inner wall of the cavity of the upper column body (41); the lower column (42) is adapted to the cylinder (10) and fixed to the cylinder (10).
5. A needleless injector according to claim 4, wherein the end face of the pressing end of the barrel (10) is provided with a boss structure, and the side wall of the boss structure is symmetrically provided with: a mounting groove (12) and a movable groove (13); the end of the lower column (42) is provided with: the lower column body (42) is sleeved on the boss structure, and the buckle key is embedded in the mounting groove (12); the hanging plates (53) are symmetrically arranged in the cavity of the upper column body (41) and correspond to the movable groove (13).
6. A needleless injector as claimed in claim 1, wherein the side walls of the rotary slot immediately adjacent the support surface (512) have a curved surface.
7. A needleless injector as claimed in claim 1, wherein the side wall of the barrel (10) adjacent to the injection end is provided with, in the axial direction of the barrel: add medicine slot hole (11), and should add medicine slot hole department and be equipped with: a slideway;
the syringe further comprises: and the medicine adding buckle (60) is clamped on the slide way of the medicine adding long hole (11), is clamped on the bottle body piston rod of the ampoule bottle (1), and can move along the slide way.
8. The needle free injector according to claim 7, wherein the medicated clasp (60) comprises:
a slide button (61);
a connecting rod (62) fixed to the lower surface of the slide button (61);
the clamping ring (64) is fixed at the end part of the connecting rod (62) and is used for being clamped on a bottle body piston rod of the ampoule bottle (1); and the clamping groove (63) is fixed on the connecting rod (62), is positioned between the sliding button (61) and the clamping ring (64), and is clamped on the slide way of the medicine adding long hole (11).
9. A compression assembly for a needleless injector, the compression assembly comprising:
a button body (51) having a lower surface provided with: according to the pressure tank, should press inslot center to be fixed with support column (511), the both sides of support column (511) all are equipped with: the rotary tank, the bottom in this rotary tank is equipped with: a sliding long through hole, and the end of the support column (511) is provided with: a support plane (512);
a support spring (52) sleeved on the support column (511);
the hanging plate (53) is symmetrically arranged in the cavity of the needleless injector, is rotatably connected with the inner wall of the cavity of the needleless injector, and is provided with a hook (531) at one end and a platform surface (532) at the other end, the platform surface (532) is attached to the supporting plane (512), and the hook (531) is used for hanging the conical surface of the piston rod (32) in the needleless injector; and a limiting rod (54) which is inserted into the sliding long through hole, the two ends of the limiting rod are limited on the inner wall of the needleless injector, and the supporting spring (52) is positioned above the limiting rod and clamped on the supporting rod.
10. Press assembly for a needle free injector according to claim 9 characterized in that it is connected to the needle free injector by means of a connection (40); the connecting piece (40) is fixed at the end part of the needleless injector and is provided with a cavity, and the hanging plates (53) are symmetrically arranged in the cavity of the connecting piece (40) and are rotationally connected with the inner wall of the cavity of the connecting piece (40); two ends of the limiting rod (54) are limited on the inner wall of the connecting piece (40).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921480254.2U CN211798044U (en) | 2019-09-06 | 2019-09-06 | Needleless injector and pressing assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921480254.2U CN211798044U (en) | 2019-09-06 | 2019-09-06 | Needleless injector and pressing assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211798044U true CN211798044U (en) | 2020-10-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921480254.2U Active CN211798044U (en) | 2019-09-06 | 2019-09-06 | Needleless injector and pressing assembly |
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| Country | Link |
|---|---|
| CN (1) | CN211798044U (en) |
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2019
- 2019-09-06 CN CN201921480254.2U patent/CN211798044U/en active Active
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