Handheld needleless subcutaneous injector and using method thereof

Abstract

The invention discloses a handheld needleless hypodermic injector and a using method thereof.The handheld needleless hypodermic injector comprises a mounting shell, the bottom of the mounting shell is sleeved with a protective cap in a threaded mode, an injection needle is mounted at the bottom of an injection medicine tube, an end cover is slidably clamped to the top of the mounting shell, and a pushing assembly acting on the injection medicine tube is arranged in the mounting shell; a locking assembly is arranged between the mounting shell and the end cover, the locking assembly and the pushing assembly form linkage, a display assembly is arranged on the mounting shell, and the display assembly and the pushing assembly form linkage. By means of the arrangement mode that the installation shell, the injection medicine tube, the end cover, the pushing assembly and the locking assembly are matched, when the injection medicine tube is installed in the installation shell, the locking state of the locking assembly on the pushing assembly is released, and then the pushing assembly can directly push the injection medicine tube; therefore, the multiple injection needles at the bottom of the injection medicine tube are inserted into the skin for medicine injection, operation can be conducted with one hand, and the operation convenience of the injection medicine tube is improved.

Description

Technical Field

[0001] The invention relates to the field of syringes, and in particular to a handheld needle-free hypodermic syringe and a use method thereof. Background Art

[0002] The handheld needle-free subcutaneous syringe is an advanced medical device for painless and convenient subcutaneous injections. It is usually used for drug administration, injection of insulin or other drugs. It is suitable for patients who need frequent injections. There are many types of patients who need subcutaneous anticoagulant injections, such as elderly patients, pregnant women, high risk of postoperative thrombosis, post-stent implantation, etc. Some of them require subcutaneous injections for a period of time.

[0003] When using a handheld needle-free subcutaneous syringe, an injection tube with a hidden needle is installed inside the syringe. One hand squeezes the button at the end of the syringe and the other hand holds the syringe. Under the squeezing of the transmission mechanism, the medicine inside the injection tube is injected into the skin through the hidden needle.

[0004] For elderly patients, they lack the ability to be independent at home, their children are not around, and it is inconvenient to get medicine in the community. The safety and standardization of subcutaneous injections cannot be guaranteed. Some patients are afraid of needles, which will reduce their compliance with medication. Existing syringes usually require two hands to operate, that is, one hand holds the syringe and presses it on the skin, and the other hand operates the syringe switch to inject the medicine. For pregnant women and the elderly, wrinkles will appear on the skin at the injection site, and direct injection at the skin wrinkle will cause a docking gap at the contact point between the syringe and the skin. In order to ensure that the syringe fits tightly to the skin, the syringe is usually held in one hand and the skin is held open with the other hand. This will result in a situation where the patient cannot operate alone, and some patients may even suffer needle stick injuries if they operate or handle improperly. Summary of the invention

[0005] The object of the present invention is to provide a handheld needle-free hypodermic syringe and a method of using the same to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above object, the present invention provides the following technical solution: a handheld needle-free hypodermic syringe, comprising a mounting housing, wherein a protective cap is threadedly sleeved on the bottom of the mounting housing;

[0007] An injection tube is threadedly installed on the bottom of the mounting shell, and injection needles are installed in a ring array on the bottom of the injection tube. An end cover is slidably clamped on the top of the mounting shell, and a pushing assembly acting on the injection tube is arranged inside the mounting shell. A locking assembly is arranged between the mounting shell and the end cover, and the locking assembly is linked to the pushing assembly. A display assembly is arranged on the mounting shell, and the display assembly is linked to the pushing assembly.

[0008] Preferably, the push component includes:

[0009] A fixing plate, the fixing plate being fixedly mounted inside the mounting housing;

[0010] A push plate, the push plate is slidably sleeved inside the mounting housing, and the bottom of the push plate is in contact with the push end of the injection tube;

[0011] A guide rod and a push spring, wherein the guide rod is fixedly connected to the top of the push plate, the push spring is slidably sleeved on the outer wall of the guide rod, the push spring is located between the push plate and the fixed plate, and the guide rod and the push spring form a linkage with the locking assembly.

[0012] Preferably, the top of the pushing plate is symmetrically fixedly connected to the first connecting plate, the top of one side of the first connecting plate is fixedly connected to the first limit block, the outer wall of the mounting shell is slidably sleeved with a connecting sleeve, the bottom of the inner wall of the connecting sleeve is symmetrically fixedly connected with a pushing block matching the first limit block, the outer wall of the mounting shell is provided with a sliding hole, the outer wall of the pushing block is slidably sleeved with the sliding hole, and the inner cavity of the sliding hole is provided with a reset spring acting on the pushing block.

[0013] Preferably, the locking assembly comprises:

[0014] A first locking plate, a second locking plate and a locking block, wherein the first locking plate and the second locking plate are symmetrically slidably arranged on the top of the inner cavity of the mounting housing, and the locking block is fixedly connected to the bottom of the first locking plate and the second locking plate on the opposite side;

[0015] A clamping block and a second connecting plate, wherein the clamping block is clamped at the top of the locking block, the second connecting plate is fixedly connected between the clamping block and the guide rod, and the outer wall of the second connecting plate is slidably interlaced with the fixed plate;

[0016] A button, a first fixing rod and an unlocking block, wherein the button is slidably sleeved on the top of the end cover, the end of the first fixing rod is fixedly connected to the unlocking block and the button, and the unlocking block is located between the first locking plate and the second locking plate.

[0017] Preferably, a first guide plate is fixedly connected to a side of the first locking plate facing the second locking plate, and a second guide plate is fixedly connected to a side of the second locking plate facing the first locking plate. The first guide plate and the second guide plate are used in conjunction with an unlocking block, and guide blocks matching the unlocking block are fixedly connected to the bottoms of opposite sides of the first guide plate and the second guide plate. Connecting grooves matching the guide blocks are provided at the bottoms of opposite sides of the first guide plate and the second guide plate, and the end cover is slidably connected to the tops of the first guide plate and the second guide plate.

[0018] Preferably, a clamping seat is fixedly connected to the top of the inner wall of the mounting shell, a clamping plate is slidably clamped inside the clamping seat, a positioning block is fixedly connected to the bottom of the inner wall of the end cover, the positioning block is located at the top of the clamping plate, the sides of the first guide plate and the sides of the second guide plate are symmetrically fixedly connected with connecting blocks, a second fixing rod is slidably inserted and sleeved on one side of the connecting block, the end of the second fixing rod is fixedly connected to the clamping plate, the outer wall of the second fixing rod is slidably sleeved with a limiting spring, and the limiting spring is located between the connecting block and the clamping plate.

[0019] Preferably, the top of the mounting shell is fixedly connected with a docking block, the bottom of the end cover is provided with a groove matching the docking block, one side of the inner wall of the groove is provided with a card slot, the outer wall of the docking block is slidably engaged with the inner cavity of the card slot, the top of the inner wall of the end cover is symmetrically fixedly connected with a locking piece, the top of the side of the first locking plate and the top of the side of the second locking plate are both provided with a slide groove, and one side of the outer wall of the locking piece is slidably engaged with the inner cavity of the slide groove.

[0020] Preferably, the top of the outer wall of the guide rod is slidably sleeved with a connecting ring, the connecting ring is located between the push spring and the fixed plate, the top of the connecting ring is symmetrically fixedly connected with a support plate, the outer wall of the support plate is slidably inserted and sleeved with the fixed plate, the bottom of the outer wall of the first fixed rod is symmetrically fixedly connected with a support rod, a limiting groove is opened on the top of the support plate, and the outer wall of the support rod is slidably engaged with the inner cavity of the limiting groove.

[0021] Preferably, the display assembly comprises:

[0022] A display light, wherein the display light is fixedly embedded on the outside of the mounting housing;

[0023] A mounting block and a pressure sensor, wherein the mounting block is fixedly connected to the inside of the mounting housing, and the pressure sensor is mounted on the top of the mounting block;

[0024] An extrusion block, wherein the extrusion block is fixedly connected to one side of the first connecting plate, the extrusion block is located on the top of the pressure sensor, and the extrusion block is located on the bottom of the pushing block;

[0025] The annular shell is installed inside the mounting shell, and a battery and a flexible circuit board are installed inside the annular shell.

[0026] The present invention also provides a method for using a handheld needle-free hypodermic syringe, comprising the following specific steps:

[0027] Step 1: When injecting the drug, first remove the protective cap by rotating it, install the injection tube inside the installation shell, and then fit the injection tube to the skin at the location where the drug needs to be injected;

[0028] Step 2: Press the button so that the top of the button is parallel to the top of the end cover. The button drives the unlocking block to move toward the first guide plate and the second guide plate through the first fixing rod. The unlocking block squeezes the first guide plate and the second guide plate to move the first locking plate and the second locking plate away from each other, thereby causing the locking block to slide horizontally and separate from the clamping block, thereby releasing the locking state of the pushing assembly.

[0029] Step 3: Under the action of the pushing spring, the pushing plate squeezes the pushing end of the injection tube, and the injection tube injects the drug into the skin through the injection needle. When the drug injection is completed, the pushing plate drives the squeezing block to move through the first connecting plate, so that the squeezing block presses the pressure sensor. The pressure sensor transmits an electrical signal to the circuit board, and the indicator light is powered on, indicating that the injection is completed.

[0030] Technical effects and advantages of the present invention:

[0031] (1) The present invention utilizes a mounting shell, an injection tube, an end cover, a push assembly, and a locking assembly to cooperate with each other. When the injection tube is mounted inside the mounting shell, the locking state of the push assembly by the locking assembly is released, and the push assembly can directly push the injection tube, so that the multiple injection needles at the bottom of the injection tube are inserted into the skin for injection. The operation can be performed with one hand, thereby improving the convenience of operation.

[0032] (2) The present invention utilizes the setting method of the locking assembly, and the locking assembly includes a first locking plate, a second locking plate, a locking block, a snap-fit ​​block, a second connecting plate, a button, a first fixing rod, an unlocking block, a first guide plate, a second guide plate and a guide block. When the button is squeezed, the button can push the first guide plate and the second guide plate to move away from each other through the first fixing rod and the unlocking block, thereby releasing the lock of the snap-fit ​​block, and the pushing assembly works. When the button is continued to be squeezed, the first locking plate and the second locking plate can be separated from the locking member, thereby releasing the limitation on the end cover, so that the end cover can be disassembled and the unlocking assembly can be disassembled and maintained. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0034] Figure 2 It is a schematic diagram of the internal structure of the front side of the present invention.

[0035] Figure 3 This is a schematic diagram of the internal structure of the front side of the housing installation part of the present invention.

[0036] Figure 4 This is a schematic diagram of the internal structure of the side of the shell installation part of the present invention.

[0037] Figure 5 It is a schematic diagram of the side structure of the first locking plate of the present invention.

[0038] Figure 6 It is a schematic diagram of the overall structure of the second connecting plate of the present invention.

[0039] Figure 7 It is a schematic diagram of the overall structure of the first guide plate of the present invention.

[0040] Figure 8 It is a schematic diagram of the internal structure of the end cover part on the side of the present invention.

[0041] Fig. 9 For the present invention Figure 4 Enlarged structural diagram at A in the middle.

[0042] In the figure: 1, mounting housing; 2, protective cap; 3, injection tube; 4, end cover; 5, push assembly; 51, fixing plate; 52, push plate; 53, push spring; 54, first connecting plate; 55, first limit block; 56, connecting sleeve; 57, push block; 58, slide hole; 59, guide rod; 6, locking assembly; 61, first locking plate; 62, second locking plate; 63, locking block; 64, clamping block; 65, second connecting plate; 66, button; 67, first fixing rod; 68, unlocking block; 69, first guide To plate; 610, second guide plate; 611, connecting ring; 612, support plate; 613, snap-fit ​​seat; 614, second fixing rod; 615, connecting block; 616, limit spring; 617, snap-fit ​​plate; 618, positioning block; 619, docking block; 620, slot; 621, slot; 622, locking piece; 623, slide groove; 624, guide block; 625, connecting groove; 626, support rod; 7, display assembly; 71, display light; 72, mounting block; 73, pressure sensor; 74, extrusion block. DETAILED DESCRIPTION

[0043] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0044] The present invention provides Figure 1-9The hand-held needle-free hypodermic syringe shown in the figure comprises a mounting shell 1, a protective cap 2 is threadedly sleeved on the bottom of the mounting shell 1, an injection tube 3 is threadedly mounted on the bottom of the mounting shell 1, and a plurality of injection needles are mounted in a circular array on the bottom of the injection tube 3. The plurality of injection needles can increase the contact area. Under the same squeezing force, the contact area increases, the pressure in the same unit decreases, and the smaller the needle tip, the corresponding pain of the needle prick on the human skin, thereby reducing the pain of the local pressure increase, and the push end of the injection tube 3 is squeezed, and the plurality of injection needles at the end of the injection tube 3 are The needle is discharged and then the medicine is injected. The user can choose injection tubes 3 of different capacities according to the capacity of the injected medicine. The top of the mounting shell 1 is slidably connected with an end cover 4. The interior of the mounting shell 1 is provided with a pushing component 5 acting on the injection tube 3. A locking component 6 is provided between the mounting shell 1 and the end cover 4. The locking component 6 is linked with the pushing component 5. A display component 7 is provided on the mounting shell 1. The display component 7 is linked with the pushing component 5. When the pushing component 5 pushes the injection tube 3 to complete the injection, the display component 7 emits light to indicate that the injection is completed.

[0045] Specifically, the pushing assembly 5 includes a fixed plate 51, a pushing plate 52, a guide rod 59 and a pushing spring 53. The fixed plate 51 is fixedly installed inside the installation shell 1, and the pushing plate 52 is slidably sleeved inside the installation shell 1. The bottom of the pushing plate 52 fits the pushing end of the injection tube 3, and the guide rod 59 is fixedly connected to the top of the pushing plate 52. The pushing spring 53 is slidably sleeved on the outer wall of the guide rod 59. The pushing spring 53 is located between the pushing plate 52 and the fixed plate 51, and the guide rod 59 and the pushing spring 53 form a linkage with the locking assembly 6, thereby releasing the locking state of the locking assembly 6 on the guide rod 59. Under the action of the pushing spring 53, the pushing plate 52 squeezes the pushing end of the injection tube 3, and the injection tube 3 injects medicine. The top of the pushing plate 52 is symmetrically fixedly connected with the first connecting plate 54, and the top of one side of the first connecting plate 54 is fixedly connected with the first limit block 55. The outer wall of the shell 1 is slidably sleeved with a connecting sleeve 56, and the bottom of the inner wall of the connecting sleeve 56 is symmetrically fixedly connected with a pushing block 57 matching the first limit block 55. A sliding hole 58 is opened on the outer wall of the installation shell 1, and the outer wall of the pushing block 57 is slidably sleeved with the sliding hole 58. The inner cavity of the sliding hole 58 is provided with a reset spring acting on the pushing block 57. When the drug injection is completed, the connecting sleeve 56 and the pushing block 57 are used to push the first limit block 55 to move upward, and the first limit block 55 drives the push plate 52 to move upward through the first connecting plate 54, and the push plate 52 drives the guide rod 59 to rise, so that the locking assembly 6 locks the guide rod 59. After the connecting sleeve 56 drives the first limit block 55 to reset through the push block 57, the reset spring can give the push block 57 an elastic force, so that the connecting sleeve 56 and the push block 57 return to their original positions to avoid affecting the operation of the push plate 52.

[0046] In particular, the locking assembly 6 includes a first locking plate 61, a second locking plate 62, a locking block 63, a clamping block 64, a second connecting plate 65, a button 66, a first fixing rod 67 and an unlocking block 68. The first locking plate 61 and the second locking plate 62 are symmetrically slidably arranged at the top of the inner cavity of the mounting shell 1. The two locking blocks 63 are respectively fixedly connected to the bottom of the first locking plate 61 and the second locking plate 62 on the opposite side. The clamping block 64 is clamped at the top of the locking block 63. When the pushing plate 52 drives the guide rod 59 to rise, the locking assembly 6 locks the guide rod 59. The guide rod 59 drives the clamping block 64 to rise through the second connecting plate 65, so that the clamping block 64 slides and clamps at the top of the two locking blocks 63. The pushing assembly 5 is thereby locked, and the bottom of the locking block 63 is in an arc shape, and the front view of the clamping block 64 is in a triangular shape, so that the clamping block 64 is slidably clamped on the top of the two locking blocks 63, and the second connecting plate 65 is fixedly connected between the clamping block 64 and the guide rod 59. The outer wall of the second connecting plate 65 is slidably inserted and sleeved with the fixed plate 51, and the button 66 is slidably sleeved on the top of the end cover 4. The end of the first fixed rod 67 is fixedly connected with the unlocking block 68 and the button 66. The unlocking block 68 is located between the first locking plate 61 and the second locking plate 62. By squeezing the button 66, the first locking plate 61 and the second locking plate 62 can be moved away from each other, thereby releasing the locking state of the locking block 63 on the clamping block 64.

[0047] In particular, a first guide plate 69 is fixedly connected to one side of the first locking plate 61 facing the second locking plate 62, and a second guide plate 610 is fixedly connected to one side of the second locking plate 62 facing the first locking plate 61. The first guide plate 69 and the second guide plate 610 are used in conjunction with the unlocking block 68. The ends of the first guide plate 69 and the second guide plate 610 are both arc-shaped, and the unlocking block 68 is semicircular. When the unlocking block 68 is driven downward by squeezing the button 66, the unlocking block 68 can push the first guide plate 69 and the second guide plate 610 to move away from each other, thereby causing the first locking plate 61 and the second locking plate 62 to move away from each other. 9 and the bottom of the opposite side of the second guide plate 610 are fixedly connected with a guide block 624 matching the unlocking block 68, and the bottom of the opposite side of the first guide plate 69 and the second guide plate 610 are provided with a connecting groove 625 matching the guide block 624, and the multiple guide blocks 624 on the opposite side of the first guide plate 69 and the second guide plate 610 are staggered, so that when the first guide plate 69 and the second guide plate 610 are in contact, the guide blocks 624 on the opposite side of the first guide plate 69 and the second guide plate 610 can be inserted into the connecting groove 625 on the opposite side, and the end cover 4 is slidably connected to the top of the first guide plate 69 and the second guide plate 610.

[0048] Furthermore, a clamping seat 613 is fixedly connected to the top of the inner wall of the installation shell 1, and a clamping plate 617 is slidably clamped inside the clamping seat 613. A positioning block 618 is fixedly connected to the bottom of the inner wall of the end cover 4, and the positioning block 618 is located at the top of the clamping plate 617. The side of the first guide plate 69 and the side of the second guide plate 610 are symmetrically fixedly connected with a connecting block 615. A second fixing rod 614 is slidably inserted and sleeved on one side of the connecting block 615. The end of the second fixing rod 614 is fixedly connected to the clamping plate 617. The second fixing rod 614 can ensure that the first locking plate 61 and the second locking plate 62 are horizontally slidably connected inside the installation shell 1. The stability of the connection is improved, and after the end cover 4 is removed, the clamping plate 617 can be slid out from the inside of the clamping seat 613, so as to remove the first locking plate 61 and the second locking plate 62. The outer wall of the second fixing rod 614 is slidably sleeved with the limiting spring 616, and the limiting spring 616 is located between the connecting block 615 and the clamping plate 617. The two limiting springs 616 on the outer wall of the second fixing rod 614 can give the first locking plate 61 and the second locking plate 62 a relatively aggregated elastic force through the connecting block 615. The top of the installation shell 1 is fixedly connected with a docking block 619, and the bottom of the end cover 4 is provided with a slot 620 matching the docking block 619. A card slot 621 is provided on one side of the inner wall of the groove 620, and multiple slots 620 and multiple card slots 621 at the bottom of the end cover 4 are provided in a circular array, and the outer wall of the docking block 619 is slidably engaged with the inner cavity of the card slot 621, so as to ensure the stability of the connection between the end cover 4 and the mounting shell 1, and a locking piece 622 is symmetrically fixedly connected to the top of the inner wall of the end cover 4, and a slide groove 623 is provided on the top of the side of the first locking plate 61 and the top of the side of the second locking plate 62, and one side of the outer wall of the locking piece 622 is slidably engaged with the inner cavity of the slide groove 623, and two symmetrical locking pieces 622 are slidably engaged with the first locking plate 61 and the second locking plate 62, and the first locking plate 61 and the second locking plate 62 can limit the end cover 4 to prevent the end cover 4 from rotating relative to the mounting shell 1, thereby ensuring the stability of the end cover 4 and the docking block 619, and squeezing the button 66 into the end cover 4 so that the top and bottom of the button 66 are aligned with the top of the end cover 4. The button 66 can drive the unlocking block 68 to squeeze the guide block 624, so that the first locking plate 61 and the second locking plate 62 slide back to back until the top of the first locking plate 61 and the second locking plate 62 slide and separate from the locking piece 622. At this time, the end cover 4 can rotate relative to the mounting shell 1, so that the docking block 619 slides into the slot 620, and the end cover 4 can be removed.

[0049] Furthermore, the top of the outer wall of the guide rod 59 is slidably sleeved with a connecting ring 611, and the connecting ring 611 is located between the push spring 53 and the fixed plate 51. The top of the connecting ring 611 is symmetrically fixedly connected with a support plate 612. The outer wall of the support plate 612 is slidably inserted and sleeved with the fixed plate 51. The bottom of the outer wall of the first fixed rod 67 is symmetrically fixedly connected with a support rod 626. A limiting groove is provided on the top of the support plate 612. The outer wall of the support rod 626 is slidably engaged with the inner cavity of the limiting groove, and the push spring 53 can pass through An upward elastic force is given to the first fixing rod 67 through the connecting ring 611, the support plate 612 and the support rod 626, so that when the button 66 is released, the first fixing rod 67 can drive the button 66 to reset until the first fixing rod 67 fits with the bottom of the locking piece 622, and the first fixing rod 67 is located between the two locking pieces 622, so as not to affect the rotation of the end cover 4, and the inner cavity of the connecting ring 611 is larger than the size of the second connecting plate 65, so as to prevent the connecting ring 611 from affecting the movement of the pushing assembly 5.

[0050] Furthermore, the display assembly 7 includes a display light 71, a mounting block 72, a pressure sensor 73, an extrusion block 74 and an annular shell. The display light 71 is fixedly embedded in the outside of the mounting shell 1, the mounting block 72 is fixedly connected to the inside of the mounting shell 1, the pressure sensor 73 is mounted on the top of the mounting block 72, the extrusion block 74 is fixedly connected to one side of the first connecting plate 54, the extrusion block 74 is located at the top of the pressure sensor 73, the extrusion block 74 is located at the bottom of the push block 57, the annular shell is installed in the inside of the mounting shell 1, and a battery and a flexible circuit board are installed in the inside of the annular shell. When the pressure sensor 73 is subjected to an extrusion force, an electrical signal is transmitted to the flexible circuit board, and the flexible circuit board controls the battery to provide power for the display light 71. The display light 71 lights up to provide the user with information that the injection is completed, and the mounting shell 1 is provided with an interface for charging the battery.

[0051] The present invention also provides a method for using a handheld needle-free hypodermic syringe, comprising the following specific steps:

[0052] When injecting medicine, first remove the protective cap 2 by rotating it, install the injection tube 3 inside the installation shell 1, and then fit the injection tube 3 to the skin at the location where the medicine needs to be injected;

[0053] The button 66 is pressed, so that the top of the button 66 is parallel to the top of the end cover 4, and the button 66 drives the unlocking block 68 to move toward the first guide plate 69 and the second guide plate 610 through the first fixing rod 67. The unlocking block 68 squeezes the first guide plate 69 and the second guide plate 610 to make the first locking plate 61 and the second locking plate 62 move away from each other, thereby making the locking block 63 slide horizontally and separate from the clamping block 64, thereby releasing the locking state of the pushing assembly 5;

[0054] Under the action of the pushing spring 53, the pushing plate 52 squeezes the pushing end of the injection tube 3, and the injection tube 3 injects the medicine into the skin through the injection needle. When the medicine injection is completed, the pushing plate 52 drives the squeezing block 74 to move through the first connecting plate 54, so that the squeezing block 74 presses the pressure sensor 73, and the pressure sensor 73 transmits an electrical signal to the circuit board, and the display light 71 is powered on to indicate that the injection is completed.

[0055] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A handheld needle-free hypodermic syringe, comprising a mounting housing (1), wherein a protective cap (2) is threadedly sleeved on the bottom of the mounting housing (1); It is characterized in that The bottom of the installation shell (1) is threadedly mounted with an injection tube (3), and the bottom of the injection tube (3) is mounted with injection needles in a ring array. The top of the installation shell (1) is slidably engaged with an end cover (4), and a push assembly (5) for acting on the injection tube (3) is arranged inside the installation shell (1). A locking assembly (6) is arranged between the installation shell (1) and the end cover (4), and the locking assembly (6) is linked to the push assembly (5). A display assembly (7) is arranged on the installation shell (1), and the display assembly (7) is linked to the push assembly (5).

2. A handheld needle-free hypodermic syringe according to claim 1, characterized in that: The push component (5) comprises: A fixing plate (51), wherein the fixing plate (51) is fixedly mounted inside the mounting housing (1); A push plate (52), the push plate (52) is slidably sleeved inside the mounting housing (1), and the bottom of the push plate (52) is in contact with the push end of the injection tube (3); A guide rod (59) and a push spring (53), wherein the guide rod (59) is fixedly connected to the top of the push plate (52), the push spring (53) is slidably sleeved on the outer wall of the guide rod (59), the push spring (53) is located between the push plate (52) and the fixed plate (51), and the guide rod (59) and the push spring (53) form a linkage with the locking assembly (6).

3. A handheld needle-free hypodermic syringe according to claim 2, characterized in that: The top of the push plate (52) is symmetrically fixedly connected to a first connecting plate (54), the top of one side of the first connecting plate (54) is fixedly connected to a first limit block (55), the outer wall of the installation shell (1) is slidably sleeved with a connecting sleeve (56), the bottom of the inner wall of the connecting sleeve (56) is symmetrically fixedly connected to a push block (57) matching the first limit block (55), the outer wall of the installation shell (1) is provided with a sliding hole (58), the outer wall of the push block (57) is slidably sleeved with the sliding hole (58), and the inner cavity of the sliding hole (58) is provided with a reset spring acting on the push block (57).

4. A handheld needle-free hypodermic syringe according to claim 2, characterized in that: The locking assembly (6) comprises: A first locking plate (61), a second locking plate (62) and a locking block (63), wherein the first locking plate (61) and the second locking plate (62) are symmetrically slidably arranged at the top of the inner cavity of the mounting shell (1), and the locking block (63) is fixedly connected to the bottom of the first locking plate (61) and the second locking plate (62) on one side opposite to each other; A clamping block (64) and a second connecting plate (65), wherein the clamping block (64) is clamped on the top of the locking block (63), the second connecting plate (65) is fixedly connected between the clamping block (64) and the guide rod (59), and the outer wall of the second connecting plate (65) is slidably inserted and sleeved with the fixed plate (51); A button (66), a first fixing rod (67) and an unlocking block (68), wherein the button (66) is slidably sleeved on the top of the end cover (4), the end of the first fixing rod (67) is fixedly connected to the unlocking block (68) and the button (66), and the unlocking block (68) is located between the first locking plate (61) and the second locking plate (62).

5. A handheld needle-free hypodermic syringe according to claim 4, characterized in that: The first locking plate (61) is fixedly connected to a first guide plate (69) on one side facing the second locking plate (62); the second locking plate (62) is fixedly connected to a second guide plate (610) on one side facing the first locking plate (61); the first guide plate (69) and the second guide plate (610) are used in conjunction with an unlocking block (68); the bottoms of the first guide plate (69) and the second guide plate (610) on opposite sides are fixedly connected to guide blocks (624) matching the unlocking block (68); the bottoms of the first guide plate (69) and the second guide plate (610) on opposite sides are provided with connecting grooves (625) matching the guide blocks (624); the end cover (4) is slidably engaged with the tops of the first guide plate (69) and the second guide plate (610).

6. A handheld needle-free hypodermic syringe according to claim 5, characterized in that: A clamping seat (613) is fixedly connected to the top of the inner wall of the mounting shell (1), and a clamping plate (617) is slidably clamped inside the clamping seat (613). A positioning block (618) is fixedly connected to the bottom of the inner wall of the end cover (4), and the positioning block (618) is located at the top of the clamping plate (617). The sides of the first guide plate (69) and the sides of the second guide plate (610) are symmetrically fixedly connected with connecting blocks (615). A second fixing rod (614) is slidably inserted and sleeved on one side of the connecting block (615), and the end of the second fixing rod (614) is fixedly connected to the clamping plate (617). A limiting spring (616) is slidably sleeved on the outer wall of the second fixing rod (614), and the limiting spring (616) is located between the connecting block (615) and the clamping plate (617).

7. A handheld needle-free hypodermic syringe according to claim 6, characterized in that: The top of the mounting shell (1) is fixedly connected with a docking block (619), the bottom of the end cover (4) is provided with a slot (620) matching the docking block (619), one side of the inner wall of the slot (620) is provided with a clamping groove (621), the outer wall of the docking block (619) is slidably engaged with the inner cavity of the clamping groove (621), the top of the inner wall of the end cover (4) is symmetrically fixedly connected with a locking piece (622), the top of the side of the first locking plate (61) and the top of the side of the second locking plate (62) are both provided with a slide groove (623), and one side of the outer wall of the locking piece (622) is slidably engaged with the inner cavity of the slide groove (623).

8. A handheld needle-free hypodermic syringe according to claim 4, characterized in that: The top of the outer wall of the guide rod (59) is slidably sleeved with a connecting ring (611), and the connecting ring (611) is located between the push spring (53) and the fixed plate (51). The top of the connecting ring (611) is symmetrically fixedly connected with a support plate (612), and the outer wall of the support plate (612) is slidably inserted and sleeved with the fixed plate (51). The bottom of the outer wall of the first fixed rod (67) is symmetrically fixedly connected with a support rod (626), and a limiting groove is provided at the top of the support plate (612), and the outer wall of the support rod (626) is slidably engaged with the inner cavity of the limiting groove.

9. A handheld needle-free hypodermic syringe according to claim 3, characterized in that: The display component (7) comprises: A display light (71), wherein the display light (71) is fixedly embedded on the outside of the mounting housing (1); A mounting block (72) and a pressure sensor (73), wherein the mounting block (72) is fixedly connected to the inside of the mounting housing (1), and the pressure sensor (73) is mounted on the top of the mounting block (72); An extrusion block (74), the extrusion block (74) being fixedly connected to one side of the first connecting plate (54), the extrusion block (74) being located on the top of the pressure sensor (73), and the extrusion block (74) being located on the bottom of the pushing block (57); An annular shell is installed inside the mounting shell (1), and a storage battery and a flexible circuit board are installed inside the annular shell.

10. A method for using a handheld needle-free hypodermic syringe, characterized in that: The specific usage steps are as follows: Step 1: When injecting a drug, first remove the protective cap (2) by rotating it, install the injection tube (3) inside the installation shell (1), and then fit the injection tube (3) to the skin at the location where the drug needs to be injected; Step 2: Press the button (66) so that the top of the button (66) is parallel to the top of the end cover (4). The button (66) drives the unlocking block (68) to move toward the first guide plate (69) and the second guide plate (610) through the first fixing rod (67). The unlocking block (68) squeezes the first guide plate (69) and the second guide plate (610) to move the first locking plate (61) and the second locking plate (62) away from each other, thereby causing the locking block (63) to slide horizontally and separate from the clamping block (64), thereby releasing the locking state of the pushing assembly (5); Step 3: Under the action of the push spring (53), the push plate (52) squeezes the push end of the injection tube (3), and the injection tube (3) injects the medicine into the skin through the injection needle. When the injection of the medicine is completed, the push plate (52) drives the squeezing block (74) to move through the first connecting plate (54), so that the squeezing block (74) presses the pressure sensor (73), and the pressure sensor (73) transmits an electrical signal to the circuit board, and the display light (71) is powered on to indicate that the injection is completed.

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