Contact head and shell of needleless injector and injector

Abstract

The invention relates to the technical field of injectors, in particular to a needleless injector contact head, a needleless injector shell and an injector, the needleless injector contact head comprises a contact part, the contact part comprises a contact surface at the top end, and an avoiding space exists between the contact surface and the bottom of the contact part; the avoiding space is formed by intersection of a contact surface extension surface and an extension surface of the side edge of the bottom of the contact part; and the sleeving part is formed by a hollow groove in the inner side of the contact part. According to the contact head, the shell and the injector, the avoiding space is formed between the contact surface and the bottom of the contact part, so that the injection operation can be prevented from being triggered by mistaken touch caused by extrusion due to inclination of the injector during injection operation.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of syringes, in particular to a contact head, a shell and a syringe. BACKGROUND

[0002] The syringe is generally composed of a needle cylinder with a small hole at the front end and a piston core rod matched with it, and some also include a piston, a cone head and other components. The function of sucking and injecting liquid is realized by the movement of the core rod in the needle cylinder. The current handheld syringe usually needs a contact head to contact the skin and move and contact the sensor after pressing, triggering the injection instruction. The existing contact head is in the shape of a cylinder. When in use, the handheld syringe will cause instability and shaking, and the side edge of the end of the contact head is easy to tilt and contact the skin, thereby causing the contact head to be squeezed and resulting in misoperation. SUMMARY

[0003] In view of the above-mentioned problem of misoperation caused by the existing contact head of the syringe, the present application is proposed.

[0004] Therefore, the first object of the present application is to provide a contact head of a needle-free syringe to avoid misoperation caused by tilting when contacting the skin.

[0005] To solve the above-mentioned technical problems, the present application provides the following technical scheme: a contact head of a needle-free syringe, comprising: a contact part, which comprises a contact surface at the top end, and an avoiding space between the contact surface and the bottom of the contact part, the avoiding space being formed by the intersection of the extension surface of the contact surface and the extension surface of the side edge of the bottom of the contact part; and a sleeving part formed by a hollow groove on the inner side of the contact part.

[0006] As a preferred scheme of the contact head of the needle-free syringe of the present application, wherein: the width d of the cross section of the avoiding space is greater than or equal to 3 mm, and the included angle a between the connecting line between the side edge of the contact surface and the side edge of the bottom of the contact part and the contact surface is greater than 30°.

[0007] As a preferred scheme of the contact head of the needle-free syringe of the present application, wherein: it further comprises a trigger part arranged at the bottom of the contact part, and an elastic member arranged on the inner side of the trigger part.

[0008] As a preferred scheme of the contact head of the needle-free syringe of the present application, wherein: the contact surface is pressed to compress the elastic member, and the pressure p of the contact surface is less than 2000 pa when the elastic member is compressed.

[0009] As a preferred scheme of the contact head of the needle-free syringe of the present application, wherein: the trigger part comprises a connecting ring connected with the contact part, a groove arranged on the outer side of the connecting ring, and a trigger ring inserted into the groove; and the elastic member is connected with the trigger ring.

[0010] The contact head of the needleless injector has the beneficial effect that the avoidance space formed between the contact surface and the bottom of the contact part can avoid the contact head from being pressed and triggering the injection operation due to the inclination of the injector during the injection operation.

[0011] The second object of the present application is to provide a shell that can avoid the misinjection operation during use.

[0012] To solve the above technical problems, the present application provides the following technical solutions: a shell comprising a contact head, further comprising a mounting part having a mounting cavity inside, an injection head being arranged at the end of the mounting cavity, and a sleeve part being sleeved on the injection head; a holding part having a top end connected with the mounting part, a bottom end provided with a mounting groove, and clamping strips arranged on both sides of the mounting groove; and a battery compartment comprising clamping grooves matched with the clamping strips.

[0013] As a preferred scheme of the shell, the mounting groove comprises a plug-in area, a butt joint area arranged above the plug-in area, and a fixing area arranged above the butt joint area; the battery compartment is internally provided with a limiting part, the limiting part being matched with the holding part in the fixing area; the clamping strips are arranged in the plug-in area; the battery compartment comprises an upper end area and a lower end area, the upper end area being plugged in the butt joint area, and the clamping grooves being arranged on the lower end area.

[0014] As a preferred scheme of the shell, the battery compartment is internally provided with a containing groove, and the side edge is provided with a through hole communicated with the containing groove; the limiting part comprises a movable plate elastically arranged in the containing groove, and a convex body arranged on the movable plate and penetrating through the through hole; the top end of the movable plate penetrates through the battery compartment and is plugged in the fixing area.

[0015] The shell has the beneficial effect that the contact head is arranged at the injection head, the contact head is in contact with the skin during use, and the misoperation caused by the inclination of the contact head when contacting the skin during the injection operation is avoided, and the battery compartment is plugged at the bottom of the holding part, the battery compartment is supported by the clamping strips, and the falling of the battery compartment is avoided.

[0016] The third object of the present application is to provide an injector that can avoid the misoperation caused by the inclination of the contact head when contacting the skin during the injection operation.

[0017] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a syringe, including a shell, and further including a driving part, which includes a driving motor disposed inside the mounting cavity and a transmission cam disposed at the output end of the driving motor; and a power storage part, which includes a sleeve disposed inside the mounting cavity, a piston rod slidably disposed in the sleeve, and a power storage member disposed between the piston rod and the sleeve, one end of the piston rod being slidably inserted into the injection head, and the other end passing through the sleeve and connected to the transmission cam via a slider; the transmission cam has an output end with a helical end face, and its slider cooperates with the helical end face of the transmission cam; the battery compartment is electrically connected to the driving motor.

[0018] In a preferred embodiment of the syringe of the present invention, the injection head includes a liquid reservoir connected to the housing and extending beyond the mounting cavity at one end, an outlet at the end of the liquid reservoir, an inlet tube on the liquid reservoir, a first one-way valve at the outlet, and a second one-way valve in the inlet tube; the sleeve is fitted onto the end of the liquid reservoir, and the piston rod is slidably inserted into the liquid reservoir; a sensor is provided at the end of the liquid reservoir, and the drive motor is triggered to operate by contacting the sensor with a contact head.

[0019] In a preferred embodiment of the syringe described in this invention, the orifice diameter of the liquid outlet is 0.1-0.5 mm.

[0020] The beneficial effects of this syringe are: when performing injection operations, the contact head comes into contact with the skin by holding the outer shell, and even if there is shaking while holding it, it will not cause accidental operation. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 A first schematic diagram of Embodiment 1 is shown; Figure 2 A first schematic diagram of Embodiment 1 is shown; Figure 3 A schematic diagram of the trigger section in Embodiment 1 is shown; Figure 4 A schematic diagram of the mounting section in Embodiment 2 is shown; Figure 5 A schematic diagram of the mounting slot in Embodiment 2 is shown; Figure 6A schematic diagram of the limiting member in Embodiment 2 is shown; Figure 7 A cross-sectional schematic diagram of Embodiment 3 is shown; Figure 8 A schematic diagram of the transmission cam in Embodiment 3 is shown; Figure 9 A schematic diagram of the injection head of Example 3 is shown. Detailed Implementation

[0023] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0024] The terminology used in this invention is that which is currently widely used in the art in consideration of the function of the invention; however, these terms may vary according to the intent of those skilled in the art, precedent, or new technology in the art. Furthermore, specific terms may be chosen by the applicant, and in such cases, their detailed meanings will be described in the detailed description of the invention. Therefore, the terms used in this specification should not be construed as simple names, but rather based on their meanings and the overall description of the invention.

[0025] Example 1, referring to Figures 1-3 The first embodiment of the present invention provides a contact head for a needleless injector, including a contact portion 100 and a sleeve portion 200.

[0026] The contact portion 100 is a cylindrical object formed by rotating around an axis, including a contact surface 101 provided for the top of the contact portion 100, and a clearance space 102 between the contact surface 101 and the bottom of the contact portion 100.

[0027] The clearance space 102 is formed by the intersection of the extended surface of the contact surface 101 and the extended surface of the bottom side of the contact portion 100.

[0028] The sleeve portion 200 is formed by a hollow groove inside the contact portion 100, wherein the sleeve portion 200 can insert the contact head into the end of the injection head 402.

[0029] The clearance space 102 is designed to prevent accidental injection caused by the syringe tilting during injection, which could lead to the contact head tilting and being squeezed.

[0030] Furthermore, the width d of the cross-section of the clearance space 102 is ≥3mm, and the angle α between the connecting line between the side of the contact surface 101 and the bottom side of the contact portion 100 and the contact surface 101 is >30°, wherein α is preferably 45°. The bottom edge of the cross-section of the clearance space 102 can be an arc shape, a right angle shape, a broken line shape, or a shape formed by splicing straight lines and arcs, etc.

[0031] The contact head also includes a trigger part 300 disposed at the bottom of the contact part 100, and an elastic element 301 is provided on its inner side. The trigger part 300 is provided with a mounting ring on its inner side, and the elastic element 301 is mounted on the mounting ring. The elastic element 301 can be made of a spring or a metal sheet.

[0032] One end of the elastic element 301 is fixed to the trigger part 300, and the other end is fixed to an external object for mounting the contact head. When the contact head is in use, the contact surface 101 contacts the skin surface and squeezes the skin through the contact surface 101. The reaction force of the skin on the contact surface 101 will compress the elastic element 301. When the contact surface 101 is compressed, the pressure p of the contact surface 101 is less than 2000 Pa. This pressure range is a comfortable pressure that the skin can accept.

[0033] Meanwhile, the existence of the clearance space 102 ensures that when the contact surface 101 comes into contact with the skin, even if the contact head tilts to the skin surface due to external factors, the presence of the clearance space 102 will prevent the contact surface 101 from being squeezed, causing the elastic element 301 to be compressed and the contact head to be displaced. At the same time, the clearance space 102 also makes it easier to observe the contact area between the contact surface 101 and the skin, allowing for more accurate alignment of the injection site.

[0034] Furthermore, the triggering part 300 includes a connecting ring 302 connected to the contact part 100, a groove 303 disposed on the outside of the connecting ring 302, and a triggering ring 304 inserted into the groove 303; the elastic member 301 is connected to the triggering ring 304.

[0035] When the syringe is in use, the contact head acts as the trigger switch of the syringe. The contact surface 101 contacts the skin, and the contact surface 101 is squeezed to compress the elastic element 301 of the connecting ring 302 and move to trigger the injection switch. After that, the injection is completed. After the contact surface 101 separates from the skin, the elastic element 301 drives the connecting ring 302 to spring back to its original position, and the injection can be performed again.

[0036] The trigger ring 304 has a bent edge 305 at the end away from the connecting ring 302 to increase the area of ​​the trigger switch.

[0037] Example 2, refer to Figures 4-6The second embodiment of the present invention provides a housing including a contact head of a needleless injector, a mounting portion 400 having a mounting cavity 401 inside, an injection head 402 being provided at the end of the mounting cavity 401, and a sleeve portion 200 being sleeved on the injection head 402; a grip portion 500 having its top end connected to the mounting portion 400 and its bottom end having a mounting groove 501, and retaining strips 502 provided on both sides of the mounting groove 501; and a battery compartment 600 including a retaining groove 601 that cooperates with the retaining strips 502, through which the battery compartment 600 is inserted into the retaining strips 502, and through which the retaining strips 502 support the battery compartment 600, preventing the battery compartment 600 from falling off due to its own weight during use.

[0038] The mounting slot 501 includes a plug-in area 501a, a docking area 501b located above the plug-in area 501a, and a fixing area 501c located above the docking area 501b. The battery compartment 600 is provided with a limiting member 602, which is located in the fixing area 501c and cooperates with the gripping part 500. The locking strip 502 is located in the plug-in area 501a. The battery compartment 600 includes an upper area 603 and a lower area 604. The upper area 603 is plugged into the docking area 501b, and the locking slot 601 is located on the lower area 604.

[0039] The upper section 603 and the lower section 604 are L-shaped as a whole. The lower section 604 is longer than the upper section 603. The upper section 603 is provided with an interface for power supply. The L-shaped design makes it easy to connect the battery compartment 600 to the card strip 502, saving space in the battery compartment 600.

[0040] Furthermore, the battery compartment 600 has an internal receiving groove 605 and a through hole communicating with the receiving groove 605 on the side; the limiting member 602 includes a movable plate 602a elastically disposed in the receiving groove 605, wherein the movable plate 602a is elastically connected to the bottom of the receiving groove 605 by a spring or metal sheet, and a protrusion 602b disposed on the movable plate 602a and passing through the through hole; the top of the movable plate 602a passes through the battery compartment 600 and is inserted into the fixed area 501c.

[0041] In the initial state, the movable plate 602a protrudes from the battery compartment 600 under the elastic force of the spring. One side of the movable plate 602a extending beyond the battery compartment 600 is a flat limiting surface, and the other side is a sloping pressing surface. When installing the battery compartment 600, the battery compartment 600 is inserted into the retaining strip 502, where the pressing surface contacts and abuts against the outer wall of the fixing area 501c, which can squeeze and compress the movable plate 602a back into the receiving groove 605. After the movable plate 602a passes through the outer wall of the fixing area 501c and enters the interior of the fixing area 501c, the movable plate 602a will pop out. At this time, the fixing surface at the top of the movable plate 602a can contact the inner wall of the fixing area 501c to restrict the position of the battery compartment 600 and prevent it from falling out.

[0042] When disassembling the battery compartment 600, simply control the protrusion 602b to move the movable plate 602a in the receiving groove 605, so that the movable plate 602a retracts into the battery compartment 600. At this time, the fixed surface at the top of the movable plate 602a disengages from the fixed area 501c, and the battery compartment 600 can be pulled out from the mounting groove 501.

[0043] The battery compartment 600 is horizontally inserted into the mounting slot 501. When the injection head 402 performs injection, the battery compartment 600 is supported by the retaining strip 502. Its moving plate 602a is not under force and supports the battery compartment 600, which can maintain the stability of the battery compartment 600 installation and prevent it from falling off the mounting slot 501.

[0044] Example 3, referring to Figures 7-9 This is a third embodiment of the present invention. This embodiment provides a syringe, including a housing, and further including a drive unit 700, which includes a drive motor 701 disposed inside a mounting cavity 401, and a transmission cam 702 disposed at the output end of the drive motor 701; and... The energy storage unit 800 includes a sleeve 801 disposed inside the mounting cavity 401, a piston rod 802 slidably disposed in the sleeve 801, and an energy storage member 803 disposed between the piston rod 802 and the sleeve 801. The energy storage member 803 is made of a spring and a metal spring sheet. One end of the piston rod 802 is slidably inserted into the injection head 402, and the other end passes through the sleeve 801 and is connected to the transmission cam 702 via a slider 804. The transmission cam 702 has an output end with a helical end face, and its slider 804 cooperates with the helical end face of the transmission cam 702; The battery compartment 600 is electrically connected to the drive motor 701.

[0045] The transmission cam 702 includes an initial plane 702a, a climbing surface 702b disposed at the end of the initial plane 702a, and a terminal plane 702c disposed at the end of the climbing surface 702b. The climbing surface 702b is spiral and rotates no more than one revolution. The initial plane 702a and the terminal plane 702c are parallel and their ends coincide or intersect.

[0046] When the transmission cam 702 rotates with the drive motor 701, it can push the slider 804 to move along the initial plane 702a, the climbing surface 702b, and the terminal plane 702c. In the initial state, at the initial plane 702a of the slider 804, as the drive motor 701 rotates, it drives the transmission cam 702 to rotate. The initial plane 702a, the climbing surface 702b, and the terminal plane 702c push the slider 804 to move in sequence, thereby driving the piston rod 802 to move and compress the accumulator 803. When the slider 804 reaches the terminal... When the piston rod 802 stops at plane 702c, it completes its final energy storage. As the drive motor 701 rotates, it drives the transmission cam 702 to rotate again, and the slider 804 will leave the end of the terminal plane 702c. At this time, the slider 804 is released from its restraint, and the energy storage component 803 is released, which drives the piston rod 802 to pop out for injection. At the same time, the slider 804 moves back to the initial plane 702a. As the drive motor 701 rotates, it drives the transmission cam 702 to rotate, which can compress and store energy in the energy storage component 803 again for injection.

[0047] Furthermore, the injection head 402 includes a liquid storage tube 402a connected to the housing and extending beyond the mounting cavity 401, an outlet 402b disposed at the end of the liquid storage tube 402a, an inlet tube 402c disposed on the liquid storage tube 402a, a first check valve 402d disposed at the outlet 402b, and a second check valve 402e disposed in the inlet tube 402c.

[0048] The inlet pipe 402c is connected to the medicine container. A first one-way valve 402d is provided to allow the liquid in the storage pipe 402a to be ejected from the outlet 402b, preventing external media from entering the storage pipe 402a. A second one-way valve 402e is provided to allow the medicine in the medicine container to enter the storage pipe 402a from the inlet pipe 402c, preventing the medicine in the storage pipe 402a from passing through the inlet pipe 402c into the medicine container. During injection, the medicine in the storage pipe 402a is ejected from the outlet 402b, and then the medicine container replenishes the medicine in the storage pipe 402a, enabling multiple injections.

[0049] The sleeve 200 is sleeved on the end of the liquid storage tube 402a, and the piston rod 802 is slidably inserted into the liquid storage tube 402a. The end of the liquid storage tube 402a is equipped with a sensor. The contact head contacts the sensor to trigger the drive motor 701 to work. When the injection is performed, the contact surface 101 of the contact head contacts the skin. The contact surface 101 is squeezed to compress the elastic element 301 of the connecting ring 302, and the connecting ring 302 moves to contact the sensor, triggering the injection switch. Then the drive motor 701 works to complete the injection. After the contact surface 101 separates from the skin, the elastic element 301 drives the connecting ring 302 to spring back to its original position, so that it can contact the skin again to complete the injection.

[0050] Furthermore, the orifice diameter of the liquid outlet 402b is 0.1-0.5 mm.

[0051] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A contact head for a needleless injector, characterized in that: include, A contact portion (100) includes a contact surface (101) at its top, and a clearance space (102) exists between the contact surface (101) and the bottom of the contact portion (100). The clearance space (102) is formed by the intersection of an extended surface of the contact surface (101) and an extended surface of the bottom side of the contact portion (100); and, The sleeve portion (200) is formed by a hollow groove inside the contact portion (100).

2. The contact head of the needleless injector according to claim 1, characterized in that: The width d of the cross section of the clearance space (102) is ≥3mm, and the angle α between the connecting line between the side of the contact surface (101) and the bottom side of the contact portion (100) and the contact surface (101) is ≥30°.

3. The contact head of the needleless injector according to claim 1 or 2, characterized in that: It also includes a trigger portion (300) disposed at the bottom of the contact portion (100), and an elastic element (301) is provided on its inner side.

4. The contact head of the needleless injector according to claim 3, characterized in that: The contact surface (101) is subjected to pressure on the elastic element (301). When the elastic element (301) is compressed, the pressure p of the contact surface (101) is less than 2000 Pa.

5. The contact head of the needleless injector according to claim 4, characterized in that: The triggering part (300) includes a connecting ring (302) connected to the contact part (100), a groove (303) disposed on the outside of the connecting ring (302), and a triggering ring (304) inserted into the groove (303). The elastic element (301) is connected to the trigger ring (304).

6. A casing, characterized in that: The needleless injector includes a contact head as described in claim 4 or 5, and further includes a mounting portion (400) having a mounting cavity (401) inside, an injection head (402) being provided at the end of the mounting cavity (401), and the sleeve portion (200) being sleeved on the injection head (402). The grip (500) has its top end connected to the mounting part (400), and its bottom end has a mounting groove (501) and retaining strips (502) disposed on both sides of the mounting groove (501); and, The battery compartment (600) includes a slot (601) that mates with the card strip (502).

7. The outer casing according to claim 6, characterized in that: The mounting slot (501) includes a plug-in area (501a), a mating area (501b) disposed above the plug-in area (501a), and a fixing area (501c) disposed above the mating area (501b). The battery compartment (600) is provided with a limiting member (602), which is located in the fixed area (501c) and cooperates with the gripping part (500); The card strip (502) is located in the insertion area (501a); The battery compartment (600) includes an upper region (603) and a lower region (604). The upper region (603) is inserted into the docking region (501b), and the slot (601) is disposed on the lower region (604).

8. The outer casing according to claim 7, characterized in that: The battery compartment (600) has an internal accommodating groove (605) and a through hole communicating with the accommodating groove (605) on its side; The limiting member (602) includes a movable plate (602a) elastically disposed in the receiving groove (605) and a protrusion (602b) disposed on the movable plate (602a) and extending through a through hole. The top of the movable plate (602a) extends out of the battery compartment (600) and is inserted into the fixed area (501c).

9. A syringe, characterized in that: The housing as described in any one of claims 6-8 further includes a drive unit (700) comprising a drive motor (701) disposed inside the mounting cavity (401), and a transmission cam (702) disposed at the output end of the drive motor (701); and, The energy storage unit (800) includes a sleeve (801) disposed inside the mounting cavity (401), a piston rod (802) slidably disposed in the sleeve (801), and an energy storage member (803) disposed between the piston rod (802) and the sleeve (801). One end of the piston rod (802) is slidably inserted into the injection head (402), and the other end passes through the sleeve (801) and is connected to the transmission cam (702) via a slider (804). The transmission cam (702) has an output end with a spiral end face, and its slider (804) cooperates with the spiral end face of the transmission cam (702); The battery compartment (600) is electrically connected to the drive motor (701).

10. The syringe according to claim 9, characterized in that: The injection head (402) includes a liquid storage tube (402a) connected to the housing and extending beyond the mounting cavity (401), an outlet (402b) disposed at the end of the liquid storage tube (402a), an inlet tube (402c) disposed on the liquid storage tube (402a), a first check valve (402d) disposed at the outlet (402b), and a second check valve (402e) disposed in the inlet tube (402c). The sleeve (200) is sleeved on the end of the liquid storage tube (402a), and the piston rod (802) is slidably inserted into the liquid storage tube (402a); The end of the liquid storage tube (402a) is equipped with a sensor, and the drive motor (701) is triggered to work by contacting the sensor with a contact head.

11. The syringe according to claim 10, characterized in that: The orifice diameter of the liquid outlet (402b) is 0.1-0.5 mm.

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