Contact head, housing and injector for a needleless injector

Abstract

The present application relates to the technical field of syringes, in particular to a contact head, a shell and a syringe of needleless syringe, comprising a contact part, which comprises a contact surface at the top end, and a clearance space between the contact surface and the bottom of the contact part, the clearance space is formed by the intersection of the extension surface of the contact surface and the extension surface of the side of the bottom of the contact part; and a sleeving part formed by the hollow groove inside the contact part. The contact head, the shell and the syringe can avoid the syringe from being squeezed and mis-triggered during the injection operation due to the inclination of the contact head caused by the inclination of the syringe.

Description

Technical Field

[0001] This invention relates to the technical field of syringes, and more particularly to a contact head, a housing, and a syringe. Background Technology

[0002] Syringes typically consist of a syringe with a small hole at the front end and a matching piston rod. Some also include components such as a piston and a cone. The movement of the piston rod within the syringe achieves the functions of aspirating and injecting liquids. Currently, handheld syringes usually require a contact head to come into contact with the skin and then be pressed and moved to contact the sensor to trigger the injection command. The existing contact head is cylindrical in shape. During use, the handheld nature of the syringe can cause instability and wobbling. The side of the contact head end is prone to tilting and contacting the skin, which can lead to the contact head being squeezed and causing misoperation. Summary of the Invention

[0003] In view of the problem of accidental injection caused by contact at the connector of existing syringes, the present invention is proposed.

[0004] Therefore, the first objective of this invention is to provide a contact head for a needleless injector that avoids misoperation caused by tilting when in contact with the skin.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a contact head of a needleless injector: comprising a contact portion, which includes a contact surface at the top end, and an clearance space exists between the contact surface and the bottom of the contact portion, the clearance space being formed by the intersection of an extended surface of the contact surface and an extended surface of the bottom side of the contact portion; and a sleeve portion, which is formed by a hollow groove on the inner side of the contact portion.

[0006] As a preferred embodiment of the contact head of the needleless injector of the present invention, wherein: the width d of the cross-section of the clearance space is ≥3mm, and the angle α between the connecting line between the side of the contact surface and the bottom side of the contact portion and the contact surface is ≥30°.

[0007] As a preferred embodiment of the contact head of the needleless injector of the present invention, it further includes a trigger portion disposed at the bottom of the contact portion, and an elastic element is provided on its inner side.

[0008] In a preferred embodiment of the contact head of the needleless injector of the present invention, the contact surface is subjected to pressure on the elastic element, and when the elastic element is compressed, the pressure p of the contact surface is less than 2000 Pa.

[0009] In a preferred embodiment of the contact head of the needleless injector of the present invention, the triggering part includes a connecting ring connected to the contacting part, a groove disposed on the outside of the connecting ring, and a triggering ring inserted into the groove; the elastic element is connected to the triggering ring.

[0010] The beneficial effect of this needle-free injector's contact head is that, through the clearance space formed between the contact surface and the bottom of the contact part, it can prevent accidental contact and injection operations caused by the syringe tilting during injection, which would result in the contact head tilting and being squeezed.

[0011] The second objective of this invention is to provide a casing that can prevent accidental injection during use.

[0012] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a housing, including a contact head, and further including a mounting part having a mounting cavity inside, an injection head being provided at the end of the mounting cavity, and a sleeve part being sleeved on the injection head; a gripping part having a top end connected to the mounting part and a mounting groove at the bottom end, and retaining strips provided on both sides of the mounting groove; and a battery compartment including a retaining groove that cooperates with the retaining strips.

[0013] In a preferred embodiment of the housing of the present invention, the mounting groove includes an insertion area, a mating area disposed above the insertion area, and a fixing area disposed above the mating area; a limiting member is provided inside the battery compartment, the limiting member being located in the fixing area and cooperating with the gripping part; the locking strip is located in the insertion area; the battery compartment includes an upper end area and a lower end area, the upper end area being inserted into the mating area, and the locking slot being disposed on the lower end area.

[0014] As a preferred embodiment of the outer casing of the present invention, the battery compartment has an internal receiving groove and a through hole communicating with the receiving groove on the side; the limiting member includes a movable plate elastically disposed in the receiving groove and a protrusion disposed on the movable plate and extending through the through hole; the top end of the movable plate extends out of the battery compartment and is inserted into the fixed area.

[0015] In addition, the shell has the following benefits: the contact head is installed at the injection head, and the contact head touches the skin during use. Even if the shell shakes, it will not cause accidental operation. At the same time, the battery compartment is inserted into the bottom of the grip and can be supported by the locking strip to prevent the battery compartment from falling off.

[0016] The third objective of this invention is to provide a syringe that avoids misoperation caused by tilting when in contact with the skin during injection.

[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 onto 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, which causes the connecting ring 302 to compress the elastic element 301. 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 housing for a syringe, characterized by: 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); 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 part (100) and the contact surface (101) is ≥30°. It also includes an installation part (400) having an installation cavity (401) inside, an injection head (402) being provided at the end of the installation cavity (401), and the sleeve part (200) being sleeved on the injection head (402); The gripping part (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); 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); 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); The movable plate (602a) extends out of the battery compartment (600) at the top under the elastic force of the spring, and the part of the movable plate (602a) that extends out of the battery compartment (600) has a flat limiting surface on one side and a sloping extrusion surface on the other side.

2. The housing for a syringe of claim 1, wherein: 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.

3. The housing for a syringe of claim 2, wherein: 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.

4. The housing for a syringe of claim 3, wherein: 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).

5. A syringe, characterized in that: The syringe housing as described in any one of claims 1 to 4 further includes a drive unit (700) comprising a drive motor (701) disposed within 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).

6. The syringe according to claim 5, characterized in that: The injection head (402) includes a reservoir tube (402a) connected to the housing of the syringe and extending beyond the mounting cavity (401), an outlet (402b) disposed at the end of the reservoir tube (402a), an inlet tube (402c) disposed on the reservoir 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.

7. The syringe according to claim 6, characterized in that: The orifice diameter of the liquid outlet (402b) is 0.1-0.5 mm.

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