A Luban lock structure and syringe

Abstract

The present invention discloses a Luban lock structure, comprising: a power rod, a power source, a fixed block, a guide pin, a sound block and a slider, the slider being slidably connected to the outside of the sound block, the power rod being hooked on the inside of the sound block via a first boss, the slider being provided with a blocking piece for limiting the first boss, the fixed block being clamped between the top of the sound block and the top of the slider, the guide pin being connected to the inner bottom of the sound block, the power source being sleeved on the guide pin, and the two ends of the power source being connected to the end of the guide pin and the end of the power rod cavity, respectively. When the Luban lock structure of the present invention is applied to a syringe, when the first boss of the power rod is hooked on the guide slope of the sound block, the blocking piece of the slider simultaneously enters the channel of the sound block, the power rod cannot move forward, thus solving the problem of mis-triggering of the power part of the syringe; there is no groove on the power rod, which increases its strength, reduces the risk of breakage during long-term storage, extends the service life of the syringe, reduces the requirements for structural manufacturing precision, and reduces production costs.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and more particularly to a Luban lock structure and a syringe. Background Art

[0002] A disposable injection pen is a pen-shaped syringe pre-filled with medication, also known as a prefilled injection pen. The power supply of all injection pens currently on the market is the same: a spring (power source) is pre-compressed. Upon use, the spring is released, driving the plunger forward to initiate the injection. Currently, all injection pens on the market utilize a clip-on design.

[0003] Attachment Figure 1 The figure provides a diagram of the power structure of the injection pen currently used on the market. Its working principle is as follows: the spring is installed in the push rod for pre-compression, and then the clamping part is clamped in the annular groove of the push rod. Then the release unit is installed to prevent the clamping part from deforming, thereby ensuring that the push rod remains fixed when the spring is compressed. When releasing, the release unit is pressed down. When the release unit exceeds the clamping part, the two hooks of the clamping part are deformed outward under the action of the spring, and the push rod is launched forward to achieve the injection function. This form has the following problems: (1) Due to space limitations, the depth of the annular groove in the push rod is only 0.5mm, and the clamping space is relatively small. This requires the product to have a high dimensional roughness, which increases the difficulty of manufacturing and also increases the cost of the parts; (2) Due to the high precision requirements and the small clamping space, there will be false triggering during actual use; (3) Because the annular groove is cut on the push rod, it may break when stored for a long time.

[0004] Therefore, it is necessary to propose a Luban lock structure and a syringe to at least partially solve the problems existing in the prior art. Summary of the Invention

[0005] The Summary of the Invention introduces a series of simplified concepts that will be further described in the Detailed Description of the Invention. The Summary of the Invention is not intended to limit the key features and essential features of the claimed technical solution, nor is it intended to determine the scope of protection of the claimed technical solution.

[0006] In order to at least partially solve the above problems, the present invention provides a Luban lock structure, characterized by comprising:

[0007] A power rod, a power source, a fixed block, a guide pin, a sound block and a slider, the slider is slidably connected to the outside of the sound block, the power rod is hung on the inside of the sound block through a first boss, the slider is provided with a baffle for limiting the first boss, the fixed block is clamped between the top of the sound block and the top of the slider, the guide pin is connected to the bottom end of the sound block, the guide pin is sleeved with a power source, and the two ends of the power source are respectively connected to the end of the guide pin and the end of the power rod cavity.

[0008] Preferably, the sound block is configured as a hollow structure with an open top, comprising:

[0009] Limiting grooves, two limiting grooves are symmetrically opened at the lower part of the sound block and pass through the side wall of the sound block;

[0010] Channels, two channels are symmetrically connected to the outside of the sound block and extend along the length direction of the sound block. The channels are connected to the limiting groove, and the width of the limiting groove is greater than the width of the channels. The lower end surface where the channels are connected to the limiting groove forms a guide slope, and the height of the guide slope gradually increases from the inside to the outside of the channel;

[0011] The second cantilever, two second cantilevers are symmetrically connected to the upper part of the sound block, the second cantilever and the channel are staggered, and a gap is provided between the second cantilever and the channel;

[0012] The hook is connected to the top of the second cantilever and is folded outwards, and the bottom surface of the hook is provided with a hook inclined surface.

[0013] Preferably, the booster rod is configured as a hollow structure with an open bottom end, and the booster rod comprises:

[0014] The first bosses are symmetrically arranged on both sides of the bottom end of the power-assisting rod, the upper surface of the first bosses is provided with an upper inclined surface for hanging on the guide inclined surface of the sound block, and the lower surface of the first bosses is provided with a lower inclined surface;

[0015] The two horizontal feature parts are symmetrically connected to the top of the power-assisting rod.

[0016] Preferably, the power source is configured as an elastic reset element.

[0017] Preferably, the fixing block includes:

[0018] A first through hole, the first through hole is opened through the center of the fixed block;

[0019] Second bosses, two second bosses symmetrically connected to both sides of the fixing block;

[0020] A first cantilever, the first cantilever is connected to the top of the second boss, and the top of the first cantilever is bent inward;

[0021] First side grooves, two first side grooves are symmetrically arranged in the first through hole, and the first side grooves correspond to the positions of the first cantilever, and the top surfaces of the first side grooves are provided with groove inclined surfaces, and the groove inclined surfaces are in contact with the hook inclined surfaces;

[0022] The second side grooves are symmetrically arranged in the first through hole and staggered with the first side grooves. The distance between the second side grooves and the center of the fixed block is smaller than the distance between the outer side surface of the channel and the center of the sound block.

[0023] Preferably, the block is configured as a hollow structure with openings at both ends, and the slider includes:

[0024] A fixing seat is connected to the top of the slider and has a second through hole in the center of the fixing seat. The fixing block is installed in the fixing seat. Accommodation grooves are symmetrically opened on both sides of the fixing seat. The second boss is installed in the accommodation groove.

[0025] A third side groove, two third side grooves are symmetrically opened on both sides of the second through hole, the third side grooves and the receiving grooves are staggered, and the distance between the third side grooves and the center of the slider is greater than the distance between the outer side surface of the channel and the center of the sound block;

[0026] Limiting holes: two limiting holes are symmetrically opened on the side wall of the slider, and the positions of the limiting holes correspond to the positions of the accommodating grooves.

[0027] Preferably, the slider further includes:

[0028] Two strip grooves are symmetrically opened on both sides of the slider and extend along the length of the slider. The strip grooves are staggered with the limiting holes and connected to the third side groove. The channel can slide along the third side groove into the strip groove;

[0029] A baffle is connected to the bottom end of the strip groove, extends along the length of the slider, and is installed in the channel;

[0030] Support arms, two support arms are symmetrically connected to the outer wall of the slider, and the support arms are arranged below the limiting hole.

[0031] Preferably, the specific assembly process of the Luban lock structure is as follows:

[0032] Step S100, installing the sound block into the slider;

[0033] Step S200, putting the fixing block on the sound block;

[0034] Step S300, placing the guide pin into the sound block;

[0035] Step S400, insert the center of the power source into the guide pin;

[0036] Step S500, putting the power lever on the power source;

[0037] Step S600: After the power lever is pressed and passes through the sound block, the power lever is rotated to hook the first boss of the power lever onto the guide slope of the sound block;

[0038] Step S700, push the slider upwards, insert the two blocking pieces of the slider into the channel of the sound block to complete the assembly.

[0039] A syringe adopts the aforementioned Luban lock structure, and the Luban lock structure is installed in the syringe to form a drug delivery assist device module, which includes:

[0040] The first shell is sleeved on the outside of the Luban lock structure and is open at one end. The power rod extends out of the first shell. The side wall of the first shell is symmetrically provided with a card slot. The edge of the second boss of the fixing block is clamped in the card slot. The end of the sound block is spaced apart from the end of the inner wall of the first shell.

[0041] The supporting power source is sleeved on the outside of the sliding block, and two ends of the supporting power source are respectively connected to the inner wall end of the first shell and the supporting arm.

[0042] Preferably, the syringe further comprises a drug administration protection device module, which comprises:

[0043] a second housing, one end of the second housing being connected to the open end of the first housing, and the other end of the second housing being open;

[0044] The medicine chamber is installed in the center of the second shell. The medicine chamber contains liquid medicine and is sealed by a rubber plug. The first cantilever is clamped with one end of the medicine chamber. The power rod extends into the medicine chamber and is close to the rubber plug. The other end of the medicine chamber is connected to a needle.

[0045] A protective cover is detachably connected to the open end of the second shell and is buckled onto the outer side of the needle;

[0046] The telescopic cover is telescopically connected to the open end of the second shell, and the telescopic cover is connected to the slider through a structural member.

[0047] Compared with the prior art, the present invention has at least the following beneficial effects:

[0048] The present invention provides a Luban lock structure. When in use, the slider is moved in the positive direction of the Z axis until the blocking piece on the slider completely exits the channel of the sound block, at which point the first boss of the power lever loses its limit. Under the action of the power source and the guiding bevel of the sound block, the power lever rotates along the guiding bevel of the sound block. When the first boss of the power lever rotates into the channel of the sound block, it begins to move in the opposite direction of the Z axis. After the power lever has completely moved out of the sound block, the power source still maintains a certain force, which pushes the sound block to move in the positive direction of the Z axis and collide with the parts behind it, thereby generating a sound. When the slider is reset (moved in the opposite direction of the Z axis), the hook bevel and the groove bevel on the sound block slide relative to each other, and the hook is compressed into the slider. As it slides, the hook engages with the limiting hole on the side of the slider, thereby forming a protective function.

[0049] When the Luban lock structure provided by the present invention is applied to a syringe, when the first boss of the power rod is hooked on the guide slope of the sound block, and the blocking piece of the slider enters the channel of the sound block at the same time, the power rod has no chance to move forward, which solves the problem of false triggering of the current power part of the syringe; there is no groove on the power rod, which increases its strength, reduces the risk of breakage during long-term storage, extends the service life of the syringe, reduces the requirements for structural manufacturing accuracy, and reduces production costs.

[0050] The Luban lock structure and syringe described in the present invention, and other advantages, objectives and features of the present invention will be reflected in part through the following description, and in part will be understood by those skilled in the art through research and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0052] Figure 1 This is a diagram of the power structure of the injection pen used on the market;

[0053] Figure 2 Schematic diagram of the exploded structure of the Luban lock structure of the present invention;

[0054] Figure 3 It is a structural diagram of the power lever in the Luban lock structure of the present invention and a partial enlarged structural diagram of point A;

[0055] Figure 4 This is a schematic structural diagram of the fixed block in the Luban lock structure of the present invention;

[0056] Figure 5 The structure of the sound block in the Luban lock structure of the present invention is shown as follows Figure 1 ;

[0057] Figure 6The structure of the sound block in the Luban lock structure of the present invention is shown as follows Figure 2 ;

[0058] Figure 7 This is a structural diagram of a slider in the Luban lock structure of the present invention;

[0059] Figure 8 Schematic diagram of the installation state of step S100 in the assembly process of the Luban lock structure of the present invention;

[0060] Figure 9 Schematic diagram of the installation state of step S200 in the assembly process of the Luban lock structure of the present invention;

[0061] Figure 10 Schematic diagram of the installation state of step S300 in the assembly process of the Luban lock structure of the present invention;

[0062] Figure 11 Schematic diagram of the installation state of step S400 in the assembly process of the Luban lock structure of the present invention;

[0063] Figure 12 Schematic diagram of the installation state of step S500 in the assembly process of the Luban lock structure of the present invention;

[0064] Figure 13 Schematic diagram of the installation state of step S600 in the assembly process of the Luban lock structure of the present invention;

[0065] Figure 14 Schematic diagram of the installation state of step S700 in the assembly process of the Luban lock structure of the present invention;

[0066] Figure 15 This is a structural diagram of the Luban lock structure of the present invention in an unused state;

[0067] Figure 16 This is a structural diagram of the Luban lock structure of the present invention, in which the slider is reset and the hook is engaged;

[0068] Figure 17 Schematic diagram of the structure of the drug delivery assist device module in the syringe of the present invention (B is the Luban lock structure);

[0069] Figure 18 Schematic diagram of the structure of the drug delivery protection device module in the syringe of the present invention;

[0070] Figure 19 Schematic diagram of the overall structure of the syringe of the present invention;

[0071] Figure 20 This is a schematic structural diagram of the syringe prompt unit of the present invention;

[0072] Figure 21 Schematic diagram of the structure of the sound-generating structure in the syringe prompt unit of the present invention;

[0073] Figure 22 This is a schematic diagram of the explosion structure of the sound-generating structure in the syringe prompt unit of the present invention;

[0074] Figure 23 It is a structural schematic diagram of the syringe airbag structure of the present invention.

[0075] In the figure: 100. Power lever; 200. Power source; 300. Fixed block; 400. Guide pin; 500. Sound block; 600. Slider;

[0076] 1. First boss; 2. Upper slope; 3. Lower slope; 4. Flat feature; 5. First cantilever; 6. Groove slope; 7. Guide slope; 8. Second cantilever; 9. Hook slope; 10. Hook; 11. Channel; 12. Limiting hole; 13. Blocking piece; 14. Second boss; 15. Support arm; 16. Limiting groove; 17. First through hole; 18. First side groove; 19. Second side groove; 20. Fixing seat; 21. Second through hole; 22. Receiving groove; 23. Third side groove; 24. Strip groove

[0077] 101. First housing; 102. Card slot; 103. Support power source; 104. Second housing; 105. Drug storage; 106. Rubber plug; 107. Needle; 108. Protective cover; 109. Telescopic cover;

[0078] 111. Base; 112. Lug; 113. Arc groove; 114. Mounting groove; 115. Round hole; 116. Sounding block; 117. Round cap; 118. Loading plate; 119. Airbag box; 120. Airbag; 121. Spring; 122. Air outlet; 123. Buffer cylinder; 124. Pressure sensor; 125. Support plate. DETAILED DESCRIPTION

[0079] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments so that those skilled in the art can implement the invention with reference to the description.

[0080] It should be understood that terms such as “having”, “including” and “comprising” used herein do not preclude the existence or addition of one or more other elements or combinations thereof.

[0081] Example 1:

[0082] like Figure 2-16 As shown, the present invention provides a Luban lock structure, comprising:

[0083] The power rod 100, the power source 200, the fixed block 300, the guide pin 400, the sound block 500 and the slider 600, the slider 600 is slidably connected to the outside of the sound block 500, the power rod 100 is hung on the inside of the sound block 500 through the first boss 1, the slider 600 is provided with a baffle 13 for limiting the first boss 1, the fixed block 300 is clamped between the top of the sound block 500 and the top of the slider 600, the guide pin 400 is connected to the bottom end of the sound block 500, the power source 200 is sleeved on the guide pin 400, and the two ends of the power source 200 are respectively connected to the end of the guide pin 400 and the end of the cavity of the power rod 100.

[0084] In the above-mentioned Luban lock structure, the sound block 500 is configured as a hollow structure with an open top, including:

[0085] Limiting grooves 16, two limiting grooves 16 are symmetrically opened at the lower part of the sound block 500 and pass through the side wall of the sound block 500;

[0086] Channels 11, two channels 11 are symmetrically connected to the outside of the sound block 500 and extend along the length of the sound block 500. The channels 11 are connected to the limiting groove 16, and the width of the limiting groove 16 is greater than the width of the channels 11. The lower end surface where the channels 11 connect to the limiting groove 16 forms a guide slope 7, and the height of the guide slope 7 gradually increases from the inside to the outside of the channel 11;

[0087] The second cantilever 8, two second cantilevers 8 are symmetrically connected to the upper part of the sound block 500, the second cantilever 8 and the channel 11 are staggered, and a gap is provided between the second cantilever 8 and the channel 11;

[0088] The hook 10 is connected to the top of the second cantilever 8 and folded outwards, and the bottom surface of the hook 10 is provided with a hook inclined surface 9.

[0089] In the above-mentioned Luban lock structure, the power rod 100 is set as a hollow structure with an open bottom end, and the power rod 100 includes:

[0090] First boss 1, two first bosses 1 are symmetrically arranged on both sides of the bottom end of the power rod 100, the upper surface of the first boss 1 is provided with an upper inclined surface 2 for hanging on the guide inclined surface 7 of the sound block 500, and the lower surface of the first boss 1 is provided with a lower inclined surface 3;

[0091] The two horizontal feature portions 4 are symmetrically connected to the top of the power-assisting rod 100 .

[0092] In the above-mentioned Luban lock structure, the power source 200 is configured as an elastic reset element.

[0093] In the above-mentioned Luban lock structure, the fixing block 300 includes:

[0094] A first through hole 17 is formed through the center of the fixing block 300;

[0095] Second bosses 14, two second bosses 14 are symmetrically connected to both sides of the fixing block 300;

[0096] The first cantilever 5 is connected to the top of the second boss 14, and the top of the first cantilever 5 is bent inward;

[0097] First side grooves 18, two first side grooves 18 are symmetrically arranged in the first through hole 17, and the first side grooves 18 correspond to the positions of the first cantilever 5. The top surface of the first side groove 18 is provided with a groove inclined surface 6, and the groove inclined surface 6 contacts the hook inclined surface 9;

[0098] The second side grooves 19, the two second side grooves are symmetrically arranged in the first through hole 17, and are staggered with the first side grooves 18. The distance between the second side grooves 19 and the center of the fixed block 300 is smaller than the distance between the outer side surface of the channel 11 and the center of the sound block 500.

[0099] In the above-mentioned Luban lock structure, the slider 600 is configured as a hollow structure with two ends open, and the slider 600 includes:

[0100] The fixing base 20 is connected to the top of the slider 600 and has a second through hole 21 in the center of the fixing base 20. The fixing block 300 is installed in the fixing base 20. The fixing base 20 has symmetrical receiving grooves 22 on both sides. The second boss 14 is installed in the receiving groove 22;

[0101] The third side grooves 23 are symmetrically arranged on both sides of the second through hole 21. The third side grooves 23 are staggered with the receiving grooves 22. The distance between the third side grooves 23 and the center of the slider 600 is greater than the distance between the outer side of the channel 11 and the center of the sound block 500. The third side grooves 23 can block the sound block 500.

[0102] The two limiting holes 12 are symmetrically provided on the side wall of the slider 600 , and the positions of the limiting holes 12 correspond to the positions of the receiving grooves 22 ;

[0103] The two strip grooves 24 are symmetrically arranged on both sides of the slider 600 and extend along the length of the slider 600. The strip grooves 24 are staggered with the limiting holes 12 and communicate with the third side groove 23. The channel 11 can slide along the third side groove 23 into the strip groove 24;

[0104] The baffle 13 is connected to the bottom end of the strip groove 24, extends along the length of the slider 600, and is installed in the channel 11;

[0105] The two support arms 15 are symmetrically connected to the outer wall of the slider 600 , and the support arms 15 are arranged below the limiting hole 12 .

[0106] In this embodiment, the specific assembly process of the Luban lock structure is as follows:

[0107] Step S100, install the sound block 500 into the slider 600, the installation state is as shown in the attached Figure 8 As shown;

[0108] The channel 11 of the slider 600 is aligned with the third side groove 23, and as the sound block 500 is installed, the channel 11 slides into the third side groove 23 and the strip groove 24, and the blocking piece 13 is no longer in contact with the channel 11.

[0109] Step S200, put the fixing block 300 on the sound block 500, and the installation state is as shown in the attached figure. Figure 9 As shown;

[0110] Squeeze the two second cantilever arms 8 to bring the hook 10 closer together and pass through the first through hole 17 of the fixing block 300. Then release the two second cantilever arms 8 so that the hook slope 9 below the hook 10 contacts and engages with the groove slope 6 of the fixing block 300.

[0111] Step S300, put the guide pin 400 into the sound block 500, the installation state is as shown in the attached Figure 10 As shown;

[0112] Install the end of the guide pin 400 at the bottom of the inner wall of the sound block 500, and the guide pin 400 does not shake, and the top of the guide pin 400 extends out of the sound block 500;

[0113] Step S400: Put the center of the power source 200 into the guide pin 400. The installation state is as shown in the attached figure. Figure 11 As shown;

[0114] The power source 200 is configured as an elastic reset element such as a spring or a rubber. In this embodiment, a spring is used. The power source 200 is sleeved on the guide pin 400. One end of the power source 200 is connected to the end of the guide pin 400, and the other end extends out of the sound block 500. In addition, the length of the power source 200 in a free state is greater than the length of the guide pin 400.

[0115] Step S500: Put the power rod 100 on the power source 200. The installation state is as shown in the attached figure. Figure 12 As shown;

[0116] Step S600: After pressing the power rod 100 and passing through the sound block 500, rotate the power rod 100 and hook the first boss 1 of the power rod 100 on the guide slope 7 of the sound block 500. The installation state is as shown in the attached figure. Figure 13 As shown;

[0117] Press the power lever 100 so that the power source 200 abuts against the top of the inner wall of the power lever 100. The first boss 1 of the power lever 100 is aligned with the channel 11. As the power lever 100 is pressed, the power source 200 is pre-pressed. The first boss 1 slides along the channel 11 until it enters the limiting groove 16. The power lever 100 is rotated so that the first boss 1 leaves the channel 11 and is hooked on the guide slope 7.

[0118] Step S700, push the slider 600 upwards, insert the two blocking pieces 13 of the slider 600 into the channel 11 of the sound block 500, and complete the assembly. The installation state is as shown in the attached figure. Figure 14 As shown;

[0119] The baffle 13 of the slider 600 is aligned with the channel 11 of the sound block 500, pushing the slider 600 to move upward so that the baffle 13 is inserted into the channel 11, and the first boss 1 abuts against the side of the baffle 13. The channel 11 limits the baffle 13 so that the first boss 1 cannot move. At this time, the second boss 14 is clamped in the receiving groove 22 of the slider 600, completing the assembly of the Luban lock structure.

[0120] The working principle and beneficial effects of the above technical solution are:

[0121] The present invention provides a Luban lock structure, in which the central axis of the Luban lock along the length direction is set as the Z axis, the installation direction of the slider 600 is the positive direction of the Z axis, and the installation direction of the power rod 100 is the negative direction of the Z axis. When the Luban lock structure is used, the slider 600 is moved in the positive direction of the Z axis until the blocking piece 13 on the slider 600 completely exits the channel 11 of the sound block 500, at which time the first boss 1 of the power rod 100 loses its limit; under the action of the power source 200 and the guiding inclined surface 7 of the sound block 500, the power rod 100 rotates along the guiding inclined surface 7 of the sound block 500. When the first boss 1 of the power rod 100 rotates into the channel 11 of the sound block 500, it begins to move in the negative direction of the Z axis; when the power rod 100 completely moves out of the sound block 500, the power source 200 still maintains a certain force, which will push the sound block 500 to move in the positive direction of the Z axis and collide with the parts behind it, thereby generating a sound. When the slider 600 is reset (moved in the opposite direction of the Z axis), the hook slope 9 and the groove slope 6 on the sound block 500 slide relative to each other, and the hook 10 is compressed into the slider 600. As the slider 600 slides, the hook 10 engages with the limiting hole 12 on the side of the slider 600, thereby forming protection.

[0122] like Figure 17-19 As shown, the present invention also provides a syringe, which adopts the above-mentioned Luban lock structure, and the Luban lock structure is installed in the syringe to form a drug delivery assist device module, and the drug delivery assist device module includes:

[0123] The first housing 101 is sleeved on the outside of the Luban lock structure and is open at one end. The power lever 100 extends out of the first housing 101. The sidewalls of the first housing 101 are symmetrically provided with slots 102. The edge of the second boss 14 of the fixing block 300 is engaged with the slot 102. The end of the sound block 500 is spaced apart from the end of the inner wall of the first housing 101.

[0124] The support power source 103 is sleeved on the outside of the slider 600, and the two ends of the support power source 103 are respectively connected to the inner wall end of the first shell 101 and the support arm 15. The support power source 103 is set as an elastic reset element such as a spring or a rubber. A spring is used in this embodiment.

[0125] The syringe also includes a drug delivery protection device module, which includes:

[0126] A second housing 104, one end of the second housing 104 is connected to the open end of the first housing 101, and the other end of the second housing 104 is open;

[0127] The medicine chamber 105 is installed in the center of the second housing 104. The medicine chamber 105 contains liquid medicine and is sealed by a rubber plug 106. The first cantilever 5 is clamped with one end of the medicine chamber 105. The booster rod 100 extends into the medicine chamber 105 and is close to the rubber plug 106. The other end of the medicine chamber 105 is connected to a needle 107.

[0128] The protective cover 108 is detachably connected to the open end of the second housing 104 and is buckled onto the outer side of the needle 107;

[0129] The telescopic cover 109 is telescopically connected to the open end of the second housing 104 , and the telescopic cover 109 is connected to the slider 600 through a structural member.

[0130] The working principle and beneficial effects of the above technical solution are:

[0131] The Luban lock structure plays a role of assisting in the syringe. When assembling the syringe:

[0132] First, the Luban lock structure is assembled into the first shell 101 with the first shell 101 and the supporting power source 103. The second boss 14 of the fixing block 300 is locked with the slot 102 on the first shell 101. At the same time, the supporting power source 103 is supported on the supporting arm 15 of the slider 600 to form a drug delivery assist device module.

[0133] Then, the drug administration assist device module is connected to the drug administration protection device module with the drug storage installed in the pharmaceutical factory.

[0134] When using the syringe, first remove the protective cover 108, then align the telescopic cover 109 with the part where the drug is to be administered, and then press the entire device to make the needle 107 pierce the skin. At this time, the telescopic cover 109 retracts inward, and at the same time drives the slider 600 to retreat. When the baffle 13 of the slider 600 completely exits the channel 11 of the sound block 500, the first boss 1 of the booster rod 100 loses its limit. Under the action of the power source 200 and the guide bevel 7 of the sound block 500, the booster rod 100 rotates along the guide bevel 7 of the sound block 500. When the first boss 1 of the booster rod 100 rotates into the channel 11 of the sound block 500, it begins to move in the opposite direction of the Z axis, thereby pushing the plug 106 or other equivalent in the medicine chamber 105, squeezing the medicine liquid out of the needle 107, and realizing self-administration. When medication is complete, the assist lever 100 completely disengages from the click block 500. The power source 200 maintains a certain force, pushing the click block 500 backward (in the positive direction of the Z axis), where it collides with the components behind it, producing a click, signaling the completion of medication. When the user removes the device after medication, the slider 600, under the action of the supporting power source 103, returns to its original position (moving in the negative direction of the Z axis). The hook 10 on the click block 500 engages with the stop hole 12 on the side of the slider 600, providing protection.

[0135] The Luban lock structure provided by the present invention, when applied to a syringe, has the following technical effects:

[0136] When the first boss 1 of the booster rod 100 is hooked on the guide slope 7 of the sound block 500, and the baffle 13 of the slider 600 enters the channel 11 of the sound block 500, the booster rod 100 has no chance to move forward, which solves the problem of false triggering of the current power part of the syringe; there is no groove on the booster rod 100, which increases its strength, reduces the risk of breakage during long-term storage, extends the service life of the syringe, reduces the requirements for structural manufacturing accuracy, and reduces production costs.

[0137] The Luban lock structure provided by the present invention is a core structure of a disposable automatic injection device in the field of self-medication. This structure can also be applied to other self-medication products, such as first aid pens, microneedle drug delivery, etc.

[0138] Example 2:

[0139] like Figure 20-22 As shown, based on the above embodiment 1, a prompt unit is connected to the inner wall end of the first shell 101, and the prompt unit includes: a sound-generating structure and an airbag structure. The sound block 500 squeezes the airbag structure to supply air to the generating structure. The sound-generating structure includes:

[0140] The seat body 111 is formed by splicing two semicircular plates. A mounting groove 114 is provided at the center of the top of the seat body 111. The mounting groove 114 is connected to the air outlet of the airbag structure. Four circular holes 115 are evenly provided on the outer ring end of the seat body 111. The circular holes 115 are connected to the mounting groove 114 through an air path. The inner wall of the circular hole 115 is provided with a thread.

[0141] Lugs 112, two lugs 112 are symmetrically connected to both sides of the base 111 and are located on the joint surface of the two semicircular plates. The lugs 112 are engaged with the slots on the side wall of the first housing 101;

[0142] Arc grooves 113, four arc grooves 113 are opened on the base body 111 and are evenly arranged along the circumferential direction;

[0143] The sounding block 116 is connected to the circular hole 115. An air flow channel is provided in the center of the sounding block 116, and a reed is connected to the air flow channel;

[0144] The round cap 117 is screwed onto the round hole 115 and abuts against the sound block 116. The round cap 117 is provided with a through hole for air flow to pass through.

[0145] The working principle and beneficial effects of the above technical solution are:

[0146] When the sound-generating structure is in use, the seat 111 is spliced ​​and connected to the first shell 101 through the lug 112, which facilitates the assembly of the seat 111. The airflow in the airbag structure enters the installation groove 114 under the pressure of the sound block 500, and then enters the circular hole 115 through the air path. The airflow flows along the airflow channel of the sound block 116, and the airflow drives the reed to shake, causing the sound block 116 to make a sound, prompting the user that the injection is completed. The round cap 117 is screwed onto the circular hole 115 to fix the sound block 116. Through the above structural design, when the sound block 500 hits the airbag structure, the squeezed airflow causes the sound block 116 to make a sound, prompting the user, avoiding the situation where the sound cannot be effectively identified by relying solely on structural collision, better determining the time point when the injection is completed, and facilitating the use of the syringe.

[0147] Example 3:

[0148] like Figure 20 、 23 As shown, based on the above embodiment 2, the airbag structure includes:

[0149] The carrier plate 118 is disposed above the base 111, with the outer end of the carrier plate 118 bent downward. An airbag box 119 is connected to the center of the carrier plate 118. The airbag box 119 is connected to the mounting groove 114, and the air outlet 126 at the bottom end of the airbag box 119 is connected to the interior of the mounting groove 114.

[0150] The airbag 120 has a bottom end connected to the airbag groove 119, a top end of the airbag 120 protrudes from the airbag groove 119, and a spring 121 is connected between the top and bottom ends of the airbag 120;

[0151] The buffer tube 123 is connected to the bottom end of the supporting plate 118 and is slidably connected in the arc groove 113 .

[0152] The working principle and beneficial effects of the above technical solution are:

[0153] When the airbag structure is in use, the sound block 500 hits the airbag 120, squeezing the air in the airbag 120, and the air flows into the mounting groove 114 through the air outlet 126 at the bottom of the airbag box. The spring 121 inside the airbag 120 acts as a buffer for the sound block 500. When the sound block 500 moves to contact the supporting plate 118, it no longer moves due to the obstruction of the supporting plate 118, ensuring that the sound block 500 moves an equal distance when in use. At the same time, the sound block 500 hits the supporting plate 118 to cause it to vibrate, and the vibration wave is transmitted to the buffer tube 123 through the bent end of the supporting plate 118. The cylindrical structure of the buffer tube 123 extends the transmission path of the vibration wave, so that the vibration wave is further dissipated. At the same time, the buffer tube 23 swings along the inner wall of the arc groove 113 to achieve the effect of vibration reduction. Through the above-mentioned structural design, while ensuring that the moving distance of the sound block 500 is equal during use and the airbag 120 is effectively squeezed, the impact caused by the collision is reduced, the vibration wave is effectively dissipated, and the sound block 500 is prevented from impacting and transmitting to the first shell 101 and then to the user's palm, thereby reducing the possibility of the palm being loosened by the impact and improving the safety of the syringe during use.

[0154] Example 4:

[0155] like Figure 23 As shown, based on the above embodiment 3, the airbag structure further includes:

[0156] A pressure sensor 124 is connected to a sensor box 125 at the top of the airbag 120 , and a lead of the pressure sensor 124 is connected to the control panel of the syringe;

[0157] The support plate 125 is connected to the bottom end of the carrier plate 124 and is configured in a sheet form. The support plate 125 is used to support and guide the wires of the pressure sensor 124 .

[0158] The working principle and beneficial effects of the above technical solution are:

[0159] A pressure sensor 124 is provided at the top of the airbag 120 for detecting the pressure of the sound block 500 exerted on the airbag 120. When the detected pressure value is less than the preset value, it indicates that the pressure of the sound block 500 is insufficient, that is, the pressure of the power source 200 on the sound block 500 is insufficient, and the power source 200 cannot achieve the preset power effect. The syringe fails to perform effective injection, and the control panel displays a fault message, prompting the user to replace or repair the syringe, thereby improving the reliability of the syringe and avoiding the problem of insufficient injection volume when the syringe is used when the power is insufficient. The support plate 125 guides and supports the wires to avoid messy distribution of the wires.

[0160] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0161] In the present invention, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0162] Although the embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the description and implementation methods. They can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and illustrations shown and described herein.

Claims

1. A Luban lock structure, characterized in that: include: A power rod (100), a power source (200), a fixed block (300), a guide pin (400), a sound block (500) and a slider (600), wherein the slider (600) is slidably connected to the outside of the sound block (500), the power rod (100) is hooked to the inside of the sound block (500) via a first boss (1), a baffle (13) for limiting the first boss (1) is provided on the slider (600), the fixed block (300) is clamped between the top of the sound block (500) and the top of the slider (600), the guide pin (400) is connected to the bottom end of the sound block (500), the power source (200) is sleeved on the guide pin (400), and the two ends of the power source (200) are respectively connected to the end of the guide pin (400) and the end of the cavity of the power rod (100); The fixing block (300) comprises: A first through hole (17), the first through hole (17) is opened through the center of the fixed block (300); Second bosses (14), two second bosses (14) symmetrically connected to both sides of the fixing block (300); A first cantilever (5), the first cantilever (5) being connected to the top of the second boss (14); First side grooves (18), two first side grooves (18) are symmetrically arranged in the first through hole (17), and the first side grooves (18) correspond to the positions of the first cantilever (5), and the top surfaces of the first side grooves (18) are provided with groove slopes (6), and the groove slopes (6) are in contact with the hook slopes (9) on the sound block (500); Second side grooves (19), two second side grooves (19) are symmetrically arranged in the first through hole (17) and are staggered with the first side grooves (18); The sound block (500) is configured as a hollow structure with an open top, comprising: Limiting grooves (16), two limiting grooves (16) are symmetrically opened at the lower part of the sound block (500) and pass through the side wall of the sound block (500); Channels (11), two channels (11) are symmetrically connected to the outside of the sound block (500) and extend along the length direction of the sound block (500), the channels (11) are connected to the limiting groove (16), and the width of the limiting groove (16) is greater than the width of the channels (11), and the lower end surface where the channels (11) and the limiting groove (16) are connected forms a guide slope (7); The slider (600) is configured as a hollow structure with two ends open. The slider (600) includes: A fixing seat (20), the fixing seat (20) is connected to the top of the slider (600) and a second through hole (21) is provided at the center of the fixing seat (20), the fixing block (300) is installed in the fixing seat (20), and accommodating grooves (22) are symmetrically opened on both sides of the fixing seat (20), and the second boss (14) is installed in the accommodating groove (22); Third side grooves (23), two third side grooves (23) are symmetrically arranged on both sides of the second through hole (21), and the third side grooves (23) and the accommodating grooves (22) are arranged in a staggered manner; Limiting holes (12), two limiting holes (12) are symmetrically opened on the side wall of the slider (600), and the positions of the limiting holes (12) correspond to the positions of the accommodating grooves (22); Strip grooves (24), two strip grooves (24) are symmetrically arranged on both sides of the slider (600) and extend along the length direction of the slider (600), the strip grooves (24) and the limiting holes (12) are staggered and connected to the third side groove (23), and the channel (11) can slide along the third side groove (23) into the strip groove (24); The baffle (13) is connected to the bottom end of the strip groove (24), the baffle (13) extends along the length direction of the slider (600), and the baffle (13) is installed in the channel (11).

2. A Luban lock structure according to claim 1, characterized in that: The sound block (500) also includes: Second cantilevers (8), two second cantilevers (8) are symmetrically connected to the upper portion of the sound block (500), the second cantilevers (8) and the channels (11) are arranged in a staggered manner, and a gap is provided between the second cantilevers (8) and the channels (11); A hook (10) is connected to the top of the second cantilever (8) and is folded outwards, and a hook inclined surface (9) is provided on the bottom surface of the hook (10).

3. A Luban lock structure according to claim 2, characterized in that: The booster rod (100) is configured as a hollow structure with an open bottom end. The booster rod (100) comprises: A first boss (1), wherein two first bosses (1) are symmetrically arranged on both sides of the bottom end of the power-assisting rod (100), an upper surface of the first boss (1) is provided with an upper inclined surface (2) for being hung on the guide inclined surface (7) of the sound block (500), and a lower surface of the first boss (1) is provided with a lower inclined surface (3); The two horizontal feature parts (4) are symmetrically connected to the top end of the power assist rod (100).

4. A Luban lock structure according to claim 1, characterized in that: The power source (200) is configured as an elastic reset element.

5. The Luban lock structure according to claim 1, characterized in that: The slider (600) further comprises: Support arms (15), two support arms (15) are symmetrically connected to the outer wall of the slider (600), and the support arms (15) are arranged below the limiting hole (12).

6. The Luban lock structure according to claim 1, characterized in that: The specific assembly process is: Step S100, inserting the sound block (500) into the slider (600); Step S200, putting the fixing block (300) on the sound block (500); Step S300, placing the guide nail (400) into the sound block (500); Step S400, inserting the center of the power source (200) into the guide pin (400); Step S500, putting the power rod (100) on the power source (200); Step S600, after the power-assisting rod (100) is pressed and passes through the sound block (500), the power-assisting rod (100) is rotated to hang the first boss (1) of the power-assisting rod (100) on the guide inclined surface (7) of the sound block (500); Step S700, push the slider (600) upwards, insert the two blocking pieces (13) of the slider (600) into the channel (11) of the sound block (500), and complete the assembly.

7. A syringe, using the Luban lock structure according to claim 1, characterized in that: The Luban lock structure is installed in the syringe to form a drug delivery assist device module, which includes: A first shell (101) is sleeved on the outside of the Luban lock structure and is open at one end. The power rod (100) extends out of the first shell (101). The side wall of the first shell (101) is symmetrically provided with a card slot (102). The edge of the second boss (14) of the fixing block (300) is engaged in the card slot (102). The end of the sound block (500) is spaced apart from the end of the inner wall of the first shell (101). The supporting power source (103) is sleeved on the outside of the slider (600), and two ends of the supporting power source (103) are respectively connected to the inner wall end of the first shell (101) and the supporting arm (15).

8. A syringe according to claim 7, characterized in that: The syringe also includes a drug delivery protection device module, which includes: A second housing (104), one end of the second housing (104) is connected to the open end of the first housing (101), and the other end of the second housing (104) is open; A medicine chamber (105) is installed at the center of the second housing (104). The medicine chamber (105) contains liquid medicine and the liquid medicine is blocked by a rubber plug (106). The first cantilever (5) is clamped with one end of the medicine chamber (105). The booster rod (100) extends into the medicine chamber (105) and is close to the rubber plug (106). The other end of the medicine chamber (105) is connected to a needle (107). A protective cover (108), the protective cover (108) is detachably connected to the open end of the second housing (104) and is buckled onto the outside of the needle (107); The telescopic cover (109) is telescopically connected to the open end of the second housing (104), and the telescopic cover (109) is connected to the slider (600) through a structural member.

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