Shell structure of injection device and injection device

Abstract

The invention relates to a shell structure of an injection device and the injection device, and the shell structure comprises an actuating shell which at least forms a local outer contour structure of the injection device; the inner shell comprises a first inner shell and a second inner shell, and the second inner shell is detachably connected into the actuating shell; when the actuating shell is in an undetached state, the first inner shell and the second inner shell are in a connected state, at the moment, when the actuating shell is rotated by external force, the first inner shell can be driven to rotate through the second inner shell, and the spraying device can be triggered to work through rotation of the first inner shell; when the actuating shell is detached, the second inner shell and the first inner shell are disconnected, at the moment, the second inner shell is rotated by external force, and the first inner shell does not rotate. According to the shell structure, when the container needs to be replaced, the injection body is locked while the actuating shell is detached, and the injection device can be continuously used only when the container needs to be replaced, so that the accuracy of dosing metering every time is guaranteed.

Description

Technical Field

[0001] The invention relates to the field of medical machine counting, and in particular to a shell structure of an injection device and the injection device. Background Art

[0002] As a drug delivery device, the user's requirements for the function of the spray device are increasing. At present, some spray devices on the market have a counting function, and when the number of times the spray device is used reaches a preset value, the container is locked, so that the spray device can no longer be used.

[0003] For example, patent CN111821546A discloses a sprayer, an indicator device and a container. The container is a double-layer structure, the inner layer of which is a soft film bag. When the delivery tube draws liquid from the container, there is no reflux gas. As the number of uses increases, the soft film bag has a certain tension to resist the extraction of liquid, which can easily lead to inaccurate measurement. Therefore, in order to accurately measure, sufficient liquid must be reserved in the container to minimize the wrinkles of the soft film bag, and the number of uses must be limited to ensure that there is still sufficient surplus in the container.

[0004] In the technical solution disclosed in CN111821546A, when pressurizing, the outer shell is rotated, the outer shell drives the internal part to rotate, and the internal part drives the holder to rotate together with the container. Due to the matching of the holder and the inclined surface of the upper shell, the holder moves axially downward together with the container. When reaching the lower limit position, the blocking component moves between the holder and the upper shell, and the blocking holder is reset to complete pressurization. When spraying, the button is pressed, and the blocking component moves away from between the holder and the upper shell. Under the reset elastic force of the driving spring, the holder and the container are reset to complete spraying. During the pressurization process, the container moves downward together with the indicator assembly, and the driving part of the outer shell is inserted into the indicator assembly; during the spraying process, the container moves upward together with the indicator assembly, and the driving part of the outer shell withdraws from the indicator assembly. At this time, the actuating part of the actuating component pushes the gear of the transmission device to rotate one tooth pitch to complete counting. The counting process occurs in the spraying stage. When the number of times the sprayer is used reaches a preset value, the outer shell is rotated, and the container moves downward together with the indicator assembly until the driving portion of the outer shell is blocked by the blocking portion blocking the opening at the bottom of the indicator assembly, and the retaining member and the container cannot continue to move downward, and the pressurization cannot continue, which plays a role of locking the container. At this time, the outer shell continues to be rotated, and the driving portion of the outer shell and the blocking portion squeeze each other, and the driving portion of the outer shell may be damaged, causing the spray device to be scrapped. In addition, after the outer shell is removed, the outer shell is separated from the sprayer body, and the actuator of the outer shell is separated from the locking device, so that the sprayer body is locked by the locking device, which prevents the inside of the sprayer body from rotating relative to the outside, and plays a role of locking the sprayer body, but the locking device can be unlocked by any other columnar structure, thereby destroying the locking of the sprayer body. Summary of the invention

[0005] Based on the above-mentioned defects in the prior art, the purpose of the present invention is to provide a shell structure of an injection device, including an actuating shell and an inner shell. When the container needs to be replaced, the actuating shell is removed and the injection body is locked at the same time. The container must be replaced before the injection device can continue to be used to ensure the accuracy of each dosage.

[0006] To this end, the present invention provides the following technical solutions.

[0007] The present invention provides a housing structure of an injection device, the housing structure comprising:

[0008] An actuating housing, which at least constitutes a partial outer contour structure of the injection device;

[0009] An inner housing, comprising a first inner housing and a second inner housing, wherein the second inner housing is detachably connected to the actuating housing;

[0010] Wherein, when the actuating housing is in an undetached state, the first inner housing and the second inner housing are in a connected state. At this time, the actuating housing is rotated by an external force, and the first inner housing can be driven to rotate through the second inner housing, and the rotation of the first inner housing can trigger the injection device to work;

[0011] When the actuating housing is removed, the second inner housing is disconnected from the first inner housing. At this time, the second inner housing is rotated by an external force, but the first inner housing does not rotate.

[0012] Preferably, the inner shell includes an elastic component for connecting the first inner shell and the second inner shell; when the actuating shell is removed, the elastic component is axially displaced to disconnect the first inner shell and the second inner shell.

[0013] Preferably, the elastic component comprises an intermediate member and a first spring;

[0014] Wherein, when the actuating housing is in an undisassembled state, the middle piece clamps the first inner housing and the second inner housing, and the first spring presses the middle piece against the actuating housing;

[0015] When the actuating housing is removed, the intermediate piece is separated from the first inner housing under the elastic force of the first spring.

[0016] Preferably, the intermediate piece comprises an annular portion and a clamping block, the annular portion is sleeved on the first inner shell or the second inner shell; the first inner shell is provided with a first notch, and the second inner shell is provided with a second notch;

[0017] Wherein, when the actuating housing is in an undisassembled state, the clamping block is respectively clamped in the first notch and the second notch; when the actuating housing is removed, the clamping block is separated from the first notch under the elastic force of the first spring.

[0018] Preferably, the connection between the actuating housing and the second inner housing includes snap connection or buckle connection.

[0019] Preferably, the housing structure comprises a fixed housing for mounting a pump assembly of the injection device; the first inner housing is rotatably connected in the fixed housing, and the second inner housing is partially rotatably connected in the fixed housing.

[0020] Preferably, the spray device comprises an infusion piece and a connecting piece connected to each other;

[0021] The first inner shell is provided with a clamping structure for clamping the axially movable connecting member; the fixed shell is provided with a first guiding inclined surface;

[0022] When the first inner shell rotates, the first guide slope can cooperate with the second guide slope of the connecting member, and the first inner shell can drive the connecting member to drive the infusion member to move axially to trigger the infusion member to suck liquid.

[0023] The present invention also provides a spraying device, comprising:

[0024] A container for holding liquids;

[0025] A counting mechanism, which is used for counting;

[0026] Locking member;

[0027] A spray body, comprising the housing structure as described above;

[0028] Wherein, under the drive of external force, the actuating shell drives the inner shell to rotate, and the first inner shell can drive the container to move axially by rotating itself, so as to trigger the injection device to work;

[0029] When the counted number reaches a preset value, the locking member locks the container;

[0030] When the actuating housing needs to be removed to replace the container, the second inner housing is separated from the first inner housing, and the spray body is self-locking.

[0031] Preferably, the counting mechanism is partially connected to the container, and the container can drive the counting mechanism to move axially to trigger the counting mechanism to count.

[0032] Preferably, the spray body comprises an infusion piece and a connecting piece, the infusion piece and the container are respectively connected to the connecting piece; the counting mechanism comprises an actuating piece and a counting assembly, the container is connected to the counting assembly;

[0033] When the actuating housing is rotated by an external force, the connecting member can be driven to drive the infusion member and the container to move in the axial direction, and the container can apply an axial force to the counting component, so that the relative positions of the actuating member and the counting component in the axial direction change, and then the container can drive the counting component to reciprocate in the axial direction, so as to trigger the infusion member to suck liquid and the spray body to spray, and trigger the counting component to count;

[0034] When the counted number reaches a preset value, the spraying body completes spraying, and the locking member is configured to limit the change of the relative position to lock the container.

[0035] Preferably, the counting assembly comprises a driving member, a rotating member, a first spring and a counting member, one end of the first spring is connected to an end of the rotating member facing away from the driving member, and the other end is in a stopped state;

[0036] Wherein, when the container is in the initial position, the rotating member is engaged with the driving member;

[0037] When the liquid suction is triggered, the actuating member pushes the rotating member to move axially, and the rotating member is disengaged from the driving member and then meshes with the actuating member;

[0038] When the injection is triggered, the rotating member moves axially in the reverse direction and disengages from the rotating member and then engages with the driving member, so that the rotating member rotates by at least one pitch angle of the driving member, and the rotating member drives the counting member to move for counting by rotating.

[0039] Preferably, the counting assembly comprises a connected shaft and a planetary gear set, the rotating member is axially movably connected to the shaft, and the rotational driving force of the rotating member is transmitted to the counting member through the planetary gear set.

[0040] Preferably, the counting member is a cover structure, and the rotating member and the locking member are both located inside the counting member;

[0041] The locking member is configured to be inserted between the rotating member and the counting member when the counted number reaches a preset value, so as to lock the rotating member in the axial direction.

[0042] Preferably, the locking member is an elastic structure, which is provided with a first limiting protrusion; the inner wall of the counting member is provided with a second limiting protrusion, which is provided with a clearance notch;

[0043] When the count times do not reach the preset value, the first limit protrusion abuts against the outer wall of the second limit protrusion; when the count times reaches the preset value, the clearance notch moves to be opposite to the first limit protrusion and gives way, and the locking member is clamped between the rotating member and the counting member under its own elastic force.

[0044] The present invention has the following technical effects:

[0045] The present invention provides a shell structure of an injection device. By improving the shell structure of the injection body, the injection body is locked while the actuating shell is removed, so that when the container needs to be replaced, the user is prevented from driving the old container to continue to operate by driving the second inner shell, that is, the container must be replaced before the injection device can be continued to be used to ensure the accuracy of each medication metering. In addition, the user cannot use other methods to crack the lock on the injection body, and must replace a new container 1 and install the actuating shell 43 before the injection device can be continued to be used. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 It is a structural cross-sectional view of the injection body of the present invention;

[0047] Figure 2 It is a schematic diagram of the three-dimensional structure of the inner shell when the first inner shell and the second inner shell are in a connected state;

[0048] Figure 3 It is a schematic diagram of the three-dimensional structure of the inner shell when the first inner shell and the second inner shell are in a disengaged state;

[0049] Figure 4 It is a schematic diagram of the three-dimensional structure of the middleware of the present invention;

[0050] Figure 5 A partial cutaway view of the injection device of the present invention;

[0051] Figure 6 It is an enlarged cross-sectional view of the structure of the injection device of the present invention when it is in an initial state;

[0052] Figure 7 It is a cross-sectional view of the assembly structure of the container of the present invention, the counting mechanism and the locking member when the container is in the initial position;

[0053] Figure 8 It is an enlarged cross-sectional view of the structure of the spray device of the present invention when it is in a state where liquid suction is completed;

[0054] Fig. 9 It is a schematic diagram of the assembly structure of the container of the present invention and the counting mechanism when the container is in the first extreme position;

[0055] Fig.10It is an exploded view of the assembly structure of the counting mechanism and the locking member of the present invention;

[0056] Fig.11 A partial cutaway view of the assembly structure of the counting mechanism and the locking member when the injection device of the present invention is in the initial state Figure 1 ;

[0057] Fig.12 A partial cutaway view of the assembly structure of the counting mechanism and the locking member when the injection device of the present invention is in the initial state Figure 2

[0058] Fig.13 It is a partial cutaway view of the assembly structure of the counting mechanism and the locking member when the spray device of the present invention is in a state of sucking liquid;

[0059] Fig.14 A partial cutaway view of the assembly structure of the counting mechanism and the locking member when the injection device of the present invention is in the initial state Figure 3 ;

[0060] Fig.15 It is a three-dimensional structural schematic diagram of the rotating member of the present invention;

[0061] Fig.16 It is a schematic diagram of the three-dimensional structure of the housing of the present invention;

[0062] Fig.17 A bottom view of a counting member of the present invention;

[0063] Fig.18 It is a sectional view of the assembly structure when the counting mechanism and the locking member of the present invention are in an unlocked relationship;

[0064] Fig.19 It is a cutaway view of the assembly structure when the counting mechanism and the locking member of the present invention are in a locked relationship;

[0065] Fig. 20 It is a partial cutaway view of the counting mechanism of the present invention;

[0066] Fig.21 It is a structural sectional view of the counting mechanism of the present invention.

[0067] Description of Reference Numerals

[0068] 100. Spray device;

[0069] 1. Container;

[0070] 2. Counting mechanism;

[0071] 21. Actuating member; 211. Gear portion; 212. First limiting block; 213. Annular groove;

[0072] 22. Counting component;

[0073] 221, driving member; 2211, first protruding tooth; 22111, first inclined surface; 2212, tooth groove; 2213, slot;

[0074] 222, rotating member; 2221, second protruding tooth; 22211, second inclined surface; 2222, first hollow channel; 2223, second limiting block; 2224, first boss; 2225, third boss;

[0075] 223, second spring;

[0076] 224, counting member; 2241, counting mark; 2242, eccentric shaft; 2243, second limiting protrusion; 22431, giving way notch; 2244, second hollow channel;

[0077] 225, shaft body; 2251, limiting groove; 2252, second boss;

[0078] 226, planetary gear set; 2261, planetary gear; 2262, sun gear;

[0079] 227, housing; 2271, convex shaft; 2272, inner gear ring; 2273, clamping part; 2274, window;

[0080] 23. Give way;

[0081] 3. Locking member; 31. First limiting protrusion; 32. Connecting section; 321. Hook;

[0082] 4. Spray body;

[0083] 41. Infusion parts;

[0084] 42. Connecting member; 421. Second guiding inclined surface;

[0085] 43. Actuating housing; 431. Piercing structure;

[0086] 44, inner housing; 441, first inner housing; 4411, first notch; 4412, clamping structure; 442, second inner housing; 4421, second notch; 443, middle piece; 4431, annular portion; 4432, clamping block; 444, first spring;

[0087] 45. Fixed housing; 451. First guide slope;

[0088] 46. ​​Pump assembly; 47. Return spring; 48. Stop ring; 49. Button. DETAILED DESCRIPTION

[0089] In order to make the technical solutions and beneficial effects of the present invention more clearly understood, the following is a detailed description by listing specific embodiments. Unless otherwise defined, the technical and scientific terms used herein have the same meanings as those in the technical field to which this application belongs.

[0090] In the description of the present invention, unless otherwise explicitly defined, terms such as “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “height”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, etc., indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of simplified description of the present invention, and do not indicate that the referred device or element must have a specific direction, be constructed and operated in a specific direction, and should not be understood as a limitation on the present invention.

[0091] In the present invention, the terms "first" and "second" are only used for the purpose of clear description and cannot be understood as the relative importance of the indicated features or the number of the indicated technical features. Therefore, the features defined as "first" and "second" can explicitly include at least one of the features. In the description of the present invention, "multiple" means at least two; "several" means at least one, unless otherwise clearly defined.

[0092] In the present invention, unless otherwise clearly defined, the terms "install", "connect", "connect", "fix", "set", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral molding; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0093] In the present invention, unless otherwise clearly defined, a first feature being “on”, “above”, “above”, “below”, “below”, “below” or “below” a second feature may mean that the first feature is in direct contact with the second feature, or the first feature and the second feature are in indirect contact with each other through an intermediate medium. Moreover, a first feature being “on”, “above” or “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the horizontal height of the first feature is higher than the horizontal height of the second feature. A first feature being “below”, “below” or “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the horizontal height of the first feature is lower than the horizontal height of the second feature.

[0094] The "upper" and "lower" mentioned in the present invention are Figure 1 The markings in shall prevail.

[0095] According to the following Figures 1 to 21 The spraying device of the present invention will be described in detail.

[0096] In this embodiment, if Figure 6 and Figure 8 As shown, the spray device 100 includes a container 1, a counting mechanism 2, a locking member 3 and a spray body 4. The container 1 is an inner and outer double-layer structure, the inner bag is used to contain liquid, the counting mechanism 2 is used to count, and the counting mechanism 2 is partially connected to the container 1. The locking member 3 is used to lock the container 1 when the counting number obtained by the counting mechanism 2 reaches a preset value, and the user is prevented from continuing to use the spray device 100 by locking the container 1. The spray body 4 includes an infusion member 41, a housing structure and a pump assembly 46. One end of the infusion member 41 is inserted into the container 1 to suck liquid from the container 1 and spray it through the pump assembly 46.

[0097] In this embodiment, if Figures 1 to 5 As shown, the housing structure includes an actuating housing 43 and an inner housing 44. The actuating housing 43 at least constitutes a partial outer contour structure of the spray device 100. The inner housing 44 includes a first inner housing 441 and a second inner housing 442. The second inner housing 442 is detachably connected to the actuating housing 43.

[0098] When the actuating shell 43 is in an unassembled state, that is, the actuating shell 43 is in a state of constituting a local outer contour structure of the injection device 100, and the first inner shell 441 and the second inner shell 442 are in a connected state. At this time, an external force rotates the actuating shell 43 (such as manual rotation). Since the second inner shell 442 is connected to the actuating shell 43, the actuating shell 43 can drive the second inner shell 442 to rotate, and the second inner shell 442 drives the first inner shell 441 to rotate. The first inner shell 441 can drive the container 1 to move axially through its own rotation to trigger the injection device 100 to work.

[0099] When the counted times reaches the preset value, the locking member 3 locks the container 1, and the spraying device 100 cannot be used any more. The container 1 needs to be replaced in time. At this time, the actuating housing 43 needs to be removed first, and then the container 1. After the actuating housing 43 is removed (such as manually removed), the user can directly touch the exposed part of the second inner housing 442, but because the second inner housing 442 is disconnected from the first inner housing 441, the first inner housing 442 will not rotate accordingly, and the spraying body 4 is self-locking. At this time, the user cannot trigger the spraying device 100 to work by rotating the second inner housing 442.

[0100] By adopting the above solution, by improving the shell structure of the injection body 4, the injection body 4 is locked while the actuation shell 43 is removed, so that when the container 1 needs to be replaced, it is possible to prevent the user from driving the old container 1 to continue to operate by driving the second inner shell 442, that is, the container 1 must be replaced before the injection device 100 can be continued to be used to ensure the accuracy of each medication metering. In addition, it is difficult for the user to crack the lock on the injection body 4 by other means, and the new container 1 must be replaced and the actuation shell 43 must be installed before the injection device 100 can be continued to be used.

[0101] In one embodiment, the inner housing 44 includes an elastic component, which is used to connect the first inner housing 441 and the second inner housing 442. When the actuating housing 43 is in an undetached state, the first inner housing 441 and the second inner housing 442 can be in a connected state under the limitation of the elastic component. When the actuating housing 43 is removed, the elastic component is axially displaced to disconnect the first inner housing 441 and the second inner housing 442.

[0102] Furthermore, if Figures 1 to 3 As shown, the elastic component includes an intermediate piece 443 and a first spring 444. When the actuating housing 43 is in an undetached state, the intermediate piece 443 is engaged with the first inner housing 441 and the second inner housing 442, and the first spring 444 presses the intermediate piece 443 against the actuating housing 43, and the first inner housing 441 and the second inner housing 442 are connected through the intermediate piece 443. When the actuating housing 43 is removed, under the elastic force of the first spring 444, the intermediate piece 443 moves away from the first inner housing 441, so that the intermediate piece 443 is separated from the first inner housing 441, and then the first inner housing 441 and the second inner housing 442 are disconnected, so that the second inner housing 442 cannot drive the first inner housing 441 to rotate together.

[0103] Furthermore, if Figures 2 to 4 As shown, the middle piece 443 includes an annular portion 4431 and a clamping block 4432. The annular portion 4431 is sleeved on the first inner shell 441 or the second inner shell 442. The first inner shell 441 is provided with a first notch 4411, and the second inner shell 442 is provided with a second notch 4421. Figure 2 As shown, when the actuating housing 43 is in an undisassembled state, one end of the clamping block 4432 is clamped in the first notch 4411, and the other end is clamped in the second notch 4421, so that the first inner housing 441 can rotate synchronously with the second inner housing 442. Figure 3 As shown, when the actuating shell 43 is removed, the actuating shell 43 removes the pressure on the middle piece 443, and under the elastic force of the first spring 444, the clamping block 4432 moves away from the first notch 4411 along with the middle piece 443, and finally, the clamping block 4432 disengages from the first notch 4411. At this time, the first inner shell 441 cannot rotate along with the second inner shell 442.

[0104] In the above solution, the axial distance between the first inner shell 441 and the second inner shell 442 remains unchanged, and the first inner shell 441 and the second inner shell 442 are connected or disconnected by changing the axial position of the intermediate piece 443. Of course, the connection method between the first inner shell 441 and the second inner shell 442 is not limited to this, and the connection or disconnection between the second inner shell 442 and the first inner shell 441 can also be achieved by controlling the change of the axial position of the second inner shell 442.

[0105] In one embodiment, if Figure 1 As shown, the connection method between the actuating housing 43 and the second inner housing 442 includes snap connection or buckle connection, so that the second inner housing 442 can rotate synchronously with the actuating housing 43, and the assembly and disassembly are convenient.

[0106] In one embodiment, if Figure 1 As shown, the housing structure includes a fixed housing 45, which is used to install the pump assembly 46 of the injection device 100. The fixed housing 45 and the actuating housing 43 together constitute the outer housing structure of the injection body 4. The first inner housing 441 is located in the fixed housing 45 and is rotatably connected to the fixed housing 45. The second inner housing 442 is partially located in the fixed housing 45 and is rotatably connected to the second inner housing 442. The actuating housing 43 is engaged with the second inner housing 442 at a portion outside the first inner housing 441. On the one hand, the first inner housing 441 and the second inner housing 442 are supported by the fixed housing 45 so that the axial spacing between the first inner housing 441 and the second inner housing 442 remains unchanged. On the other hand, the first inner housing 441 is hidden by the fixed housing 45 so that the user cannot contact the first inner housing 441, thereby preventing the user from manually rotating the first inner housing 441 after removing the actuating housing 43 to trigger the injection device 100 to work.

[0107] In one embodiment, if Figure 1 and Figure 8 As shown, the injection device 100 includes an infusion piece 41 and a connecting piece 42 connected to each other, the infusion piece 41 and the container 1 are respectively connected to the connecting piece 42, and the first inner shell 441 can drive the connecting piece 42 to drive the container 1 and the infusion piece 41 to move axially by rotating itself. The first inner shell 441 is provided with a clamping structure 4412, the clamping structure 4412 is clamped with the connecting piece 42, and the connecting piece 42 can move axially relative to the first inner shell 441.

[0108] Furthermore, the clamping structure 4412 is a clamping protrusion, and the connecting member 42 is provided with a clamping groove, which extends axially, and the clamping structure 4412 is clamped with the clamping groove. Of course, the structure of the clamping structure 4412 is not limited to this, and the clamping structure 4412 can be a clamping groove, and a clamping protrusion matching it is provided on the connecting member 42 to achieve clamping.

[0109] In one embodiment, the spray device 100 sprays liquid in a mist form.

[0110] In one embodiment, if Figure 1 As shown, the infusion piece 41 is an infusion tube.

[0111] In one embodiment, if Figures 6 to 9 As shown, the counting mechanism 2 is partially connected to the container 1, and the container 1 can drive the counting mechanism 2 to move axially, and the counting mechanism 2 triggers counting by moving axially.

[0112] In one embodiment, if Figures 6 to 9 As shown, the container 1 is located above the counting mechanism 2. The container 1 drives the counting mechanism 2 to move downward under external force to trigger the infusion part 41 to suck liquid; the container 1 drives the counting mechanism 2 to reset upward to trigger the spray body 4 to spray. When a liquid is sucked and sprayed, the counting mechanism 2 triggers a count by moving.

[0113] In one embodiment, if Figure 6 As shown, the counting mechanism 2 is located in the actuating housing 43. After the actuating housing 43 is removed, the counting mechanism 2 is pulled downwards, and the counting mechanism 2 and the container 1 can be removed.

[0114] In one embodiment, if Figure 6 As shown, the locking member 3 is located inside the counting mechanism 2. Of course, the position of the locking member 3 is not limited thereto, and the locking member 3 can also be arranged outside the counting mechanism 2.

[0115] In a specific embodiment, Figure 1 , Figure 5 and Figure 8 As shown, the spray body 4 includes an infusion piece 41, a connecting piece 42, a shell structure, a pump assembly 46, a return spring 47, a blocking ring 48 and a button 49, and the shell structure includes an actuating shell 43, an inner shell 44 and a fixed shell 45. The infusion piece 41 is movably connected to the connecting piece 42, and the connecting piece 42 is connected to the top of the container 1. The return spring 47 is sleeved on the outer periphery of the container 1, and one end of the return spring 47 abuts against the connecting piece 42, and the other end abuts against the second inner shell 442. The first inner shell 441 is rotatably connected to the fixed shell 45, and the connecting piece 42 is axially movably clamped to the clamping structure 4412 of the first inner shell 441, and the blocking ring 48 is connected to the fixed shell 45. As shown Figure 5 As shown, the inner wall of the fixed housing 45 is provided with a first guiding inclined surface 451 , and the connecting member 42 is provided with a second guiding inclined surface 421 .

[0116] When the liquid suction is triggered, the actuating shell 43 is rotated, and the actuating shell 43 drives the second inner shell 442 to rotate, and the second inner shell 442 drives the first inner shell 441 to rotate, and the first inner shell 441 applies a rotational driving force to the connecting member 42. With the cooperation of the first guide bevel 451 and the second guide bevel 421, the connecting member 42 rotates and moves downward, and the reset spring 47 is compressed at the same time, until the connecting member 42 drives the container 1 and the counting mechanism 2 to move to the first extreme position, the second guide bevel 421 disengages from the first guide bevel 451, and the blocking ring 48 moves between the fixed shell 45 and the connecting member 42 to prevent the connecting member 42 from resetting under the rebound force of the reset spring 47. At this time, the injection device 100 is in a state where liquid suction is completed.

[0117] When the spraying is triggered, the button 49 needs to be pressed to move the blocking ring 48 away from between the fixed shell 45 and the connecting member 42. At this time, under the rebound force of the reset spring 47, the connecting member 42 drives the container 1 and the counting mechanism 2 to reset to the second extreme position (initial position), thereby realizing the spraying and restoring the spraying device 100 to its initial state.

[0118] It should be understood that if the user removes the force during the process of rotating the actuating shell 43, at this time, if the second guide bevel 421 is still in a state of matching with the first guide bevel 451, then after the external force is removed, the connecting member 42 will drive the container 1 and the counting mechanism 2 to reset under the rebound force of the reset spring 47.

[0119] It should be understood that the first limit position and the second limit position are relative, indicating two stop positions of the connecting member 42 and / or the container 1 and / or the counting mechanism 2 during the reciprocating motion.

[0120] It should be understood that the operating principle of the injection body 4 can refer to any existing structure that can achieve the above functions.

[0121] Furthermore, if Figure 6 As shown, the actuating housing 43 is provided with a puncturing structure 431, the counting mechanism 2 is provided with a yielding channel 23, and the container 1 is a two-layer structure of an inner and outer layer. The puncturing structure 431 is used to puncture the outer layer structure of the container 1 when the injection device 100 is used for the first time to form an air vent on the container 1, and the air vent is used to perform pressure compensation when the infusion piece 41 sucks liquid from the inner layer structure of the container 1.

[0122] In one embodiment, if Figure 6 and Fig.10 As shown, the counting mechanism 2 includes an actuating member 21 and a counting assembly 22 , and the container 1 is connected to the counting assembly 22 .

[0123] When the external force rotates the actuating housing 43, the first inner housing 441 rotates, and the rotation of the first inner housing 441 can drive the connecting member 42 to drive the container 1 to move axially. Figures 6 to 9 As shown, the container 1 applies an axial force to the counting assembly 22, so that the relative position of the actuator 21 and the counting assembly 22 in the axial direction changes, that is, the counting assembly 22 can move axially relative to the actuator 21, and then the container 1 can drive the counting assembly 22 to reciprocate in the axial direction. The axial reciprocating motion of the container 1 can trigger the infusion part 41 to suck liquid and trigger the spray body 4 to spray; the change in the relative position of the actuator 21 and the counting assembly 22 in the axial direction can trigger the counting assembly 22 to count.

[0124] When the counting times reaches a preset value, the locking member 3 is constructed to limit the change in the relative position of the actuator 21 and the counting assembly 22 in the axial direction, and the axial movement of the container 1 is limited by limiting the counting assembly 22, so as to lock the container 1. At this time, the spray body 4 completes the spraying, thereby locking the spray device 100, and the user cannot continue to use the spray device 100. At this time, the container 1 needs to be replaced and the spray device 100 can be reused.

[0125] When the actuating shell 43 is removed, since the second inner shell 442 is separated from the first inner shell 441, the user cannot drive the first inner shell 441 to rotate by rotating the second inner shell 442, and cannot trigger the spray device 100 to work, and the spray body 4 is self-locking.

[0126] By adopting the above technical solution, the counting mechanism 2 is improved, and the counting mechanism 2 can change the relative position of the actuator 21 and the counting assembly 22 in the axial direction, so that the container 1 can reciprocate in the axial direction, thereby making the injection device 100 in a usable state. In addition, when the number of counts reaches a preset value, after the last injection is completed, the locking member 3 locks the container 1 by limiting the change of the relative position of the actuator 21 and the counting assembly 22 in the axial direction. Compared with the solution of locking the outer shell by the blocking part in the prior art, it can prevent the user from continuing to rotate the outer shell after locking and causing damage to the driving part of the outer shell by excessive force, which causes the injection body 4 to need to be repaired or replaced.

[0127] It should be understood that, for the convenience of the user, when replacing the container 1, the counting mechanism 2 is replaced together. Of course, it is also possible to only replace the container 1 and re-enable the counting mechanism 2 by resetting the counting mechanism 2.

[0128] In one embodiment, if Figures 6 to 9As shown, when the container 1 moves under external force to trigger the suction of liquid, the actuator 21 is constructed to be able to be inserted into the counting assembly 22, and the relative position of the actuator 21 and the counting assembly 22 in the axial direction becomes smaller, which can allow the container 1 to move axially; and when the container 1 is reset to trigger the injection, the actuator 21 is constructed to be able to retract, and the relative position of the actuator 21 and the counting assembly 22 in the axial direction is restored to the initial state.

[0129] In one embodiment, if Figures 6 to 9 As shown, the actuating housing 43 surrounds the counting mechanism 2; the actuating member 21 is located on the side of the counting assembly 22 facing away from the container 1, and one end of the actuating member 21 is axially movably connected to the counting assembly 22. Specifically, the container 1 is located above the counting mechanism 2 as an example for specific description. At this time, the actuating member 21 is located below the counting assembly 22. When the liquid is sucked, the container 1 drives the counting mechanism 2 to move downward, and the actuating housing 43 contacts the actuating member 21. Since the inner wall of the actuating housing 43 applies an upward abutting force to the bottom of the actuating member 21, the counting assembly 22 moves downward while the actuating member 21 does not move downward, and the relative position of the actuating member 21 and the counting assembly 22 in the axial direction changes, thereby triggering the suction of liquid and counting. When the spray is triggered, the button 49 is pressed, and the container 1 drives the counting assembly 22 to move upward to reset, and the relative position of the actuating member 21 and the counting assembly 22 in the axial direction changes in the opposite direction, and the counting mechanism 2 completes the counting.

[0130] In one embodiment, if Figures 6 to 9 As shown, the end of the actuator 21 facing away from the container 1 serves as the first end of the counting mechanism 2. When the container 1 is in the initial position, there is a gap between the actuator 21 and the actuator housing 43. When the liquid is sucked, the container 1 drives the counting assembly 22 and the actuator 21 to move downward for a distance. The actuator 21 abuts against the actuator housing 43, and the container 1 drives the counting assembly 22 to continue to move downward, which can trigger the liquid to be sucked. In addition, Figure 6 and Fig.19 As shown, after the locking member 3 is locked, if the user rotates the actuating shell 43 again, when the counting mechanism 2 moves to the point where the actuating member 21 abuts against the actuating shell 43, the locking member 3 prevents the actuating member 21 and the counting assembly 22 from changing their axial relative positions. Therefore, the counting mechanism 2 and the container 1 stop axial movement, and the infusion member 41 can draw a small amount of liquid. However, the axial movement distance of the container 1 is not enough to trigger a complete aspiration of liquid. At this time, the second guide bevel 421 is still in a state of matching with the first guide bevel 451. After the external force is removed, the connecting member 42 drives the container 1 to reset, and the spray device 100 sprays or emits a small amount of liquid, which cannot form a mist.

[0131] In another embodiment, when the container 1 is in the initial position, the actuator 21 is in contact with the actuator housing 43 (not shown in the figure). Specifically, taking the container 1 located above the counting mechanism 2 as an example, when the liquid is sucked, the container 1 drives the counting assembly 22 to move downward, at which time, the bottom of the actuator 21 is held by the actuator housing 43 and cannot move downward; when the injection is triggered, the container 1 drives the counting assembly 22 to move upward, and the actuator 21 moves upward under its own gravity without accompanying the counting assembly 22 until the container 1 is reset to the initial position. During the entire reciprocating motion of the container 1, the axial position of the actuator 21 does not change. When the locking member 3 is locked, since the actuator 21 is in contact with the actuator housing 43, the counting mechanism 2 cannot move downward, and then the container 1 cannot move downward, and the infusion member 41 cannot suck liquid from the container 1 again, thereby achieving locking.

[0132] Furthermore, the end of the actuating member 21 facing away from the container 1 is flat, which is beneficial for uniform force between the actuating member 21 and the actuating housing 43 when they are in contact.

[0133] In one embodiment, if Figure 6 and Fig.10 As shown, the counting assembly 22 includes a driving member 221, a rotating member 222, a second spring 223 and a counting member 224. One end of the second spring 223 is connected to one end of the rotating member 222 facing away from the driving member 221, and the other end is in a stop state. When the container 1 is in the initial position, the rotating member 222 is engaged with the driving member 221 under the pressure of the second spring 223.

[0134] The following is specifically described by taking the example that the container 1 is located above the counting mechanism 2 and there is a gap between the bottom of the actuating member 21 and the actuating housing 43 in the initial state.

[0135] like Figure 6 , Fig.11 , Fig.13 and Fig.14 As shown, when the suction of liquid is triggered, the container 1 drives the counting mechanism 2 to move downward. When the actuator 21 is abutted by the actuating housing 43, the actuator 21 stops moving downward, while the counting assembly 22 continues to move downward. The rotating member 222 of the counting assembly 22 moves downward until it abuts against the tooth surface of the actuator 21. The actuator 21 pushes the rotating member 222 upward, so that the rotating member 222 disengages from the driving member 221. At this time, under the downward elastic force of the second spring 223, the rotating member 222 engages with the actuator 21 downward along the tooth surface of the actuator 21, and the rotating member 222 rotates to a first angle.

[0136] like Fig.13 and Fig.14As shown, when the spray is triggered, the container 1 drives the counting assembly 22 to move upward, that is, the rotating member 222 of the counting assembly 22 moves upward relative to the actuating member 21 until the rotating member 222 is separated from the actuating member 21. At this time, under the downward elastic force of the second spring 223 and because the driving member 221 moves upward, the driving member 221 pushes the rotating member 222 upward, and the rotating member 222 moves along the tooth surface of the driving member 221 until the two are engaged, and the rotating member 222 rotates a second angle. In this way, during one reciprocating motion of the container 1, the rotating member 222 rotates twice in total, and the rotation angle is the sum of the first angle and the second angle, that is, the rotating member 222 rotates at least one pitch angle of the driving member 221, and the rotating member 222 drives the counting member 224 to move for counting by rotating.

[0137] In the present solution, the counting mechanism 2 has a simple and compact structure. By changing the relative positions of the rotating member 222 and the actuating member 21 in the axial direction, during one reciprocating motion of the container 1, the rotating member 222 can alternately engage with the driving member 221 and the actuating member 21, thereby driving the rotating member 222 to rotate at least one pitch angle of the driving member 221. The mechanical coordination is simple and the rotation angle can be precisely controlled.

[0138] Furthermore, if Figure 6 and Fig.13 As shown, one of the actuating member 21 and the driving member 221 is disposed around the other, which is beneficial to reducing the overall size of the counting mechanism 2. In a specific embodiment, the driving member 221 is an annular structure, which is disposed around the actuating member 21, and the bottom of the actuating member 21 extends out from below the driving member 221 and abuts against the inner wall of the actuating housing 43.

[0139] In a specific embodiment, Fig.10 , Fig.11 , Figures 13 to 15 As shown, the actuator 21 is provided with a gear portion 211; the driving member 221 is provided with a plurality of first protruding teeth 2211, all of which are arranged in sequence along the circumference of the driving member 221, and a tooth groove 2212 is formed between two adjacent first protruding teeth 2211; and the rotating member 222 is provided with a second protruding tooth 2221. Fig.14 As shown, when the container 1 is in the initial position, the second protruding teeth 2221 are engaged with the tooth grooves 2212, and the second protruding teeth 2221 are at least partially opposite to the gear teeth 211 in the axial direction, so that when the axial position of the rotating member 222 relative to the actuating member 21 changes, the second protruding teeth 2221 can contact the gear teeth 211. It should be understood that the number of the second protruding teeth 2221 can be two, three, four, five or even more, and preferably, all the second protruding teeth 2221 are evenly spaced and arranged along the circumference of the rotating member 222.

[0140] Specifically, the container 1 is located above the counting mechanism 2 as an example for detailed description.

[0141] like Fig.14 As shown, when the container 1 is in the initial position, the second protruding tooth 2221 is engaged in a tooth groove 2212 .

[0142] like Fig.13 As shown, when the suction of liquid is triggered, the rotating member 222 moves downward until the second protruding tooth 2221 abuts against the gear tooth portion 211 of the actuating member 21, and the gear tooth portion 211 pushes the rotating member 222 upward. At the same time, the driving member 221 continues to move downward, and finally, the rotating member 222 disengages from the driving member 221, and then the rotating member 222 engages with the gear tooth portion 211, and the rotating member 222 rotates a first angle.

[0143] When the injection is triggered, the rotating member 222 moves upward until the second protruding tooth 2221 disengages from the gear portion 211. At this time, under the downward elastic force of the second spring 223, the rotating member 222 tends to move downward, and the second protruding tooth 2221 abuts against the first protruding tooth 2211 of the upward moving driving member 221, and the driving member 221 continues to move upward. Finally, the second protruding tooth 2221 engages with another tooth groove 2212 of the driving member 221, and the rotating member 222 rotates to a second angle.

[0144] Furthermore, if Fig.14 As shown, when the container 1 is in the initial position, the second protruding tooth 2221 is engaged with the tooth groove 2212, and at the same time, the second protruding tooth 2221 is against the tooth surface of the gear portion 211. In this way, when the container 1 moves downward until the actuator 21 contacts the actuator housing 43, the gear portion 211 of the actuator 21 can immediately push the rotating member 222 upward, thereby shortening the movement distance of the counting component 22, which is beneficial to the miniaturized design of the counting mechanism 2.

[0145] Furthermore, when the container 1 is in the first extreme position, at this time, the injection device 100 is in a liquid suction completion state, the second convex tooth 2221 is engaged with the gear portion 211, and at the same time, the second convex tooth 2221 is against the tooth surface of the first convex tooth 2211 (not shown in the figure), so that when the container 1 moves upward to trigger the injection, the first convex tooth 2211 of the driving member 221 can immediately push the second convex tooth 2221 upward, so that the second convex tooth 2221 is disengaged from the gear portion 211, thereby shortening the movement distance of the counting component 22, which is conducive to the miniaturization design of the counting mechanism 2.

[0146] Furthermore, if Fig.13 As shown, the first protruding tooth 2211 is provided with a first inclined surface 22111 , and the second protruding tooth 2221 is provided with a second inclined surface 22211 . The first inclined surface 22111 and the second inclined surface 22211 match each other so that the second protruding tooth 2221 is meshed with the tooth groove 2212 .

[0147] In one embodiment, if Fig.11 As shown, one end of the actuator 21 is inserted into the driving member 221 , and a first limit block 212 is provided on the outer wall of the actuator 21 ; the first limit block 212 is movably engaged with the tooth groove 2212 , and the tooth groove 2212 limits the rotation of the actuator 21 relative to the rotating member 222 .

[0148] In one embodiment, if Fig.11 and Fig.18 As shown, the driving member 221 is constructed as a bottom shell structure of the counting assembly 22 , which is beneficial to the miniaturized design of the counting mechanism 2 .

[0149] In one embodiment, if Figure 6 , Fig.10 , Fig.14 and Fig. 20 As shown, the counting assembly 22 includes a connected shaft 225 and a planetary gear set 226. The rotating member 222 is axially movably connected to the shaft 225. The rotational driving force of the rotating member 222 is transmitted to the counting member 224 through the planetary gear set 226. The counting member 224 is driven to rotate through the planetary gear set 226 to achieve counting, thereby increasing the counting capacity.

[0150] Of course, the shaft 225 and the planetary gear set 226 may not be provided, and counting marks may be directly provided on the rotating member 222 to form a counting member, which may move axially and rotate during the counting process.

[0151] Furthermore, if Fig.10 and Fig.15 As shown, the outer wall of the shaft body 225 is provided with a limit groove 2251 extending in the axial direction, the rotating member 222 is provided with a first hollow channel 2222, and a second limit block 2223 is provided in the first hollow channel 2222. The shaft body 225 extends into the first hollow channel 2222, and the second limit block 2223 is movably engaged with the limit groove 2251, so that the rotating member 222 can drive the shaft body 225 to rotate together through the cooperation of the second limit block 2223 and the limit groove 2251. At the same time, the rotating member 222 can also move along the shaft body 225, so that when the liquid is sucked, the rotating member 222 can move axially relative to the driving member 221 and disengage from the driving member 221, and when the spray is triggered, the rotating member 222 can move axially relative to the actuator 21 and disengage from the actuator 21. Of course, the setting positions of the limiting groove and the second limiting block are not limited thereto, and the limiting groove may also be set on the rotating member 222 , and the second limiting block may be set on the shaft body 225 .

[0152] Furthermore, if Fig.10 , Fig.15 and Fig.18As shown, the first hollow channel 2222 is provided with a first boss 2224, and the outer periphery of the shaft body 225 is provided with a second boss 2252. The second spring 223 is sleeved on the outer axis of the shaft body 225, and the two ends of the second spring 223 are respectively abutted against the first boss 2224 and the second boss 2252. The surface wall of the first hollow channel 2222 can also limit the circumferential movement of the second spring 223.

[0153] Furthermore, if Fig.10 , Fig.16 , Fig. 20 and Fig.21 As shown, the counting assembly 22 includes a housing 227, which is provided with a convex shaft 2271 and an inner gear ring 2272; the shaft body 225 is rotatably connected to the convex shaft 2271. The planetary gear set 226 includes a planetary gear 2261 and a sun gear 2262 that are meshed with each other; the counting member 224 is provided with a counting mark 2241 and an eccentric shaft 2242, the sun gear 2262 is coaxially connected to the shaft body 225, and the planetary gear 2261 is coaxially connected to the eccentric shaft 2242 and meshed with the inner gear ring 2272. When the rotating member 222 rotates, the shaft body 225 rotates synchronously, the shaft body 225 drives the sun gear 2262 to rotate, and the planetary gear 2261 transmits the rotational force to the eccentric shaft 2242, and finally drives the counting member 224 to rotate, and the user obtains the counting result by observing the changes in the counting mark 2241.

[0154] Furthermore, if Fig.10 As shown, the counting member 224 is provided with a second hollow channel 2244 , the eccentric shaft 2242 is located on a surface of the counting member 224 facing away from the rotating member 222 , the sun gear 2262 is located at one end of the shaft body 225 , and the shaft body 225 extends into the second hollow channel 2244 so that the sun gear 2262 is meshed with the planetary gear 2261 .

[0155] Furthermore, the shaft body 225 and the sun gear 2262 are integrally formed to simplify assembly. Of course, the structural relationship between the two is not limited to this, and they can also be assembled by fastening, welding, clamping or buckling.

[0156] Of course, the counting assembly 22 may not be provided with the planetary gear set 226. For example, the counting member 224 may be driven to rotate directly by the shaft 225 to achieve counting.

[0157] In one embodiment, if Fig.10 , Fig.18 and Fig. 20As shown, the housing 227 is a cover structure, the driving member 221 is used as the bottom shell structure of the counting assembly 22, the housing 227 is connected to the driving member 221, and the two are connected to form a cavity, and the housing 227 is provided with a window 2274, and the window 2274 is used to observe the counting mark 2241. The driving member 221 is an annular structure, and the actuator 21 is inserted into the annular region of the driving member 221 from the bottom of the driving member 221. The actuator 21 is provided with an annular groove 213, and the gear portion 211 is located on the end surface of the annular groove 213. The rotating member 222 partially extends into the annular groove 213, and the second protruding tooth 2221 of the rotating member 222 is at least partially opposite to the gear portion 211 in the axial direction.

[0158] In one embodiment, if Figure 6 and Fig.10 As shown, the housing 227 is provided with a snap-fit ​​portion 2273 for snap-fitting the container 1 , so as to facilitate quick assembly of the counting mechanism 2 and the container 1 .

[0159] In one embodiment, the locking member 3 is configured to axially lock the rotating member 222 when the count times reaches a preset value, so that the counting assembly 22 cannot move axially, thereby limiting the axial movement of the container 1 and preventing the liquid from being sucked again.

[0160] Furthermore, if Figure 6 As shown, the counting member 224 is a cover structure, and the rotating member 222 and the locking member 3 are both located in the counting member 224. Taking the container 1 located above the counting mechanism 2 as an example, as shown in FIG. Fig.16 and Fig.17 As shown, the locking member 3 is constructed to be stuck between the rotating member 222 and the counting member 224 when the counting number reaches a preset value. At this time, the injection body 4 completes the last injection. Since the actuating shell 43 can press upward against the actuating member 21, the actuating member 21 presses upward against the rotating member 222, and the rotating member 222 presses upward against the counting member 224 through the locking member 3, the counting assembly 22 cannot move downward. In this way, when the bottom of the actuating member 21 is stopped by the actuating shell 43, the counting mechanism 2 cannot move downward, and thus cannot complete the suction of liquid.

[0161] Furthermore, if Fig.12 As shown, the locking member 3 is an elastic structure, which is provided with a first limiting protrusion 31; Fig.17 As shown, the inner wall of the counting member 224 is provided with a second limiting protrusion 2243 which is provided with a clearance notch 22431 .

[0162] When the counted times do not reach the preset value, the first limiting protrusion 31 abuts against the outer wall of the second limiting protrusion 2243 to limit the locking member 3 from being stuck between the rotating member 222 and the counting member 224. Fig.18As shown, there is an axial gap between the rotating member 222 and the counting member 224 to allow the rotating member 222 to move axially, so that the counting assembly 22 can move axially relative to the actuating member 21. In this way, the container 1 connected to the counting assembly 22 can also move axially smoothly, and the injection device 100 can be used normally.

[0163] When the counted times reaches the preset value, the clearance notch 22431 moves to be opposite to the first limiting protrusion 31 and gives way, and the first limiting protrusion 31 is separated from the limiting position of the second limiting protrusion 2243. At this time, under the elastic force of the locking member 3, the first limiting protrusion 31 enters the clearance notch 22431, and the locking member 3 is clamped between the rotating member 222 and the counting member 224. Fig.19 As shown, by locking the rotating member 222 in the axial direction, the counting assembly 22 is locked in the axial direction, and the injection device 100 cannot be used any more.

[0164] Furthermore, if Fig.15 As shown, the end of the rotating member 222 facing the counting member 224 is provided with a third boss 2225. Fig.19 As shown, when the locking member 3 is inserted between the rotating member 222 and the counting member 224, one surface wall of the locking member 3 abuts against the second limiting protrusion 2243, and the other surface wall abuts against the third boss 2225, so as to lock the rotating member 222 in the axial direction. In this way, the contact area between the locking structure 3 and the rotating member 222 and the counting member 224 is large, and the locking structure 3 is not easily damaged, so that the user is prevented from forcibly unlocking the lock by damaging the locking structure 3.

[0165] In one embodiment, if Fig.10 and Fig.12 As shown, the locking member 3 includes a connecting section 32, one end of the connecting section 32 is provided with a hook 321, and the first limiting protrusion 31 is located at the other end of the connecting section 32; Fig.13 As shown, the driving member 221 is the bottom shell structure of the counting assembly 22 . The driving member 221 is provided with a slot 2213 . The hook 321 is engaged with the slot 2213 to assemble the locking member 3 to the driving member 221 .

[0166] Furthermore, if Fig.12 As shown, the cross section of the connecting section 32 is in an arc shape with a simple structure, and the end surfaces on both sides of the connecting section 32 respectively abut against the second limiting protrusion 2243 and the rotating member 222, so that the force is more stable.

[0167] Furthermore, the locking member 3 is a metal spring sheet with high structural strength and is not easily damaged.

[0168] It should be understood that the above embodiments are exemplary and are not intended to include all possible implementations included in the claims. Various modifications and changes may be made on the basis of the above embodiments without departing from the scope of the present disclosure. Similarly, the various technical features of the above embodiments may be arbitrarily combined to form other embodiments of the present invention that may not be explicitly described. Therefore, the above embodiments only express several implementations of the present invention and do not limit the scope of protection of the patent of the present invention.

Claims

1. A shell structure of an injection device, characterized in that: The housing structure comprises: An actuating housing (43), which at least constitutes a partial outer contour structure of the injection device (100); An inner housing (44), comprising a first inner housing (441) and a second inner housing (442), wherein the second inner housing (442) is detachably connected to the actuating housing (43); Wherein, when the actuating shell (43) is in an undetached state, the first inner shell (441) and the second inner shell (442) are in a connected state. At this time, when the actuating shell (43) is rotated by an external force, the first inner shell (441) can be driven to rotate through the second inner shell (442), and the rotation of the first inner shell (441) can trigger the injection device (100) to work; When the actuating housing (43) is removed, the second inner housing (442) and the first inner housing (441) are disconnected. At this time, when an external force rotates the second inner housing (442), the first inner housing (441) does not rotate.

2. The housing structure according to claim 1, characterized in that: The inner shell (44) includes an elastic component, which is used to connect the first inner shell (441) and the second inner shell (442); when the actuating shell (43) is removed, the elastic component is axially displaced to disconnect the first inner shell (441) and the second inner shell (442).

3. The housing structure according to claim 2, characterized in that: The elastic component includes a middle piece (443) and a first spring (444); Wherein, when the actuating housing (43) is in an undisassembled state, the middle piece (443) is clamped with the first inner housing (441) and the second inner housing (442), and the first spring (444) presses the middle piece (443) against the actuating housing (43); When the actuating housing (43) is removed, the middle piece (443) is separated from the first inner housing (441) under the elastic force of the first spring (444).

4. The housing structure according to claim 3, characterized in that: The intermediate component (443) comprises an annular portion (4431) and a clamping block (4432); the annular portion (4431) is sleeved on the first inner shell (441) or the second inner shell (442); the first inner shell (441) is provided with a first notch (4411), and the second inner shell (442) is provided with a second notch (4421); Wherein, when the actuating housing (43) is in an undisassembled state, the engaging block (4432) is respectively engaged with the first notch (4411) and the second notch (4421); when the actuating housing (43) is removed, the engaging block (4432) is disengaged from the first notch (4411) under the elastic force of the first spring (444).

5. The housing structure according to any one of claims 1 to 4, characterized in that: The connection method between the actuating housing (43) and the second inner housing (442) includes snap connection or buckle connection.

6. The housing structure according to any one of claims 1 to 4, characterized in that: The housing structure comprises a fixed housing (45) for mounting a pump assembly (46) of the injection device (100); the first inner housing (441) is rotatably connected inside the fixed housing (45), and the second inner housing (442) is partially rotatably connected inside the fixed housing (45).

7. The housing structure according to claim 6, characterized in that: The spray device (100) comprises an infusion piece (41) and a connecting piece (42) connected to each other; The first inner shell (441) is provided with a clamping structure (4412) for clamping the axially movable connecting member (42); the fixed shell (45) is provided with a first guiding inclined surface (451); When the first inner shell (441) rotates, the first guide bevel (451) can cooperate with the second guide bevel (421) of the connecting member (42), and the first inner shell (441) can drive the connecting member (42) to drive the infusion member (41) to move axially to trigger the infusion member (41) to suck liquid.

8. A spraying device, characterized in that: The injection device (100) comprises: A container (1) for containing a liquid; A counting mechanism (2) for counting; Locking member (3); A spray body (4), comprising a housing structure as claimed in any one of claims 1 to 7; Wherein, under the drive of an external force, the actuating shell (43) drives the inner shell (44) to rotate, and the first inner shell (441) can drive the container (1) to move axially by its own rotation, so as to trigger the injection device (100) to work; When the counted number reaches a preset value, the locking member (3) locks the container (1); When the actuating housing (43) needs to be removed to replace the container (1), the second inner housing (442) is separated from the first inner housing (441), and the spray body (4) is self-locking.

9. The spraying device according to claim 8, characterized in that The counting mechanism (2) is partially connected to the container (1), and the container (1) can drive the counting mechanism (2) to move along the axial direction to trigger the counting mechanism (2) to count.

10. The spraying device according to claim 9, characterized in that The spray body (4) comprises an infusion piece (41) and a connecting piece (42), and the infusion piece (41) and the container (1) are respectively connected to the connecting piece (42); the counting mechanism (2) comprises an actuating piece (21) and a counting assembly (22), and the container (1) is connected to the counting assembly (22); When the actuating housing (43) is rotated by an external force, the connecting member (42) can be driven to drive the infusion member (41) and the container (1) to move in the axial direction, and the container (1) can exert an axial force on the counting component (22), so that the relative positions of the actuating member (21) and the counting component (22) in the axial direction change, and the container (1) can drive the counting component (22) to reciprocate in the axial direction, so as to trigger the infusion member (41) to suck liquid and the spray body (4) to spray, and trigger the counting component (22) to count; When the counted number reaches a preset value, the spraying body (4) completes spraying, and the locking member (3) is configured to limit the change in the relative position so as to lock the container (1).

11. The spraying device according to claim 10, characterized in that The counting assembly (22) comprises a driving member (221), a rotating member (222), a first spring (223) and a counting member (224); one end of the first spring (223) is connected to an end of the rotating member (222) facing away from the driving member (221), and the other end is in a stopped state; Wherein, when the container (1) is in an initial position, the rotating member (222) is engaged with the driving member (221); When the liquid suction is triggered, the actuating member (21) pushes the rotating member (222) to move axially, and the rotating member (222) is disengaged from the driving member (221) and then meshes with the actuating member (21); When the spraying is triggered, the rotating member (222) moves axially in the reverse direction and disengages from the rotating member (222) and then engages with the driving member (221), so that the rotating member (222) rotates at least one tooth pitch angle of the driving member (221), and the rotating member (222) drives the counting member (224) to move for counting by rotating.

12. The spraying device according to claim 11, characterized in that The counting component (22) comprises a connected shaft (225) and a planetary gear set (226); the rotating member (222) is axially movably connected to the shaft (225); and the rotational driving force of the rotating member (222) is transmitted to the counting member (224) via the planetary gear set (226).

13. The spraying device according to claim 11, characterized in that The counting member (224) is a cover structure, and the rotating member (222) and the locking member (3) are both located inside the counting member (224); The locking member (3) is configured to be inserted between the rotating member (222) and the counting member (224) when the number of counts reaches a preset value, so as to lock the rotating member (222) in the axial direction.

14. The spraying device according to claim 13, characterized in that The locking member (3) is an elastic structure, and is provided with a first limiting protrusion (31); the inner wall of the counting member (224) is provided with a second limiting protrusion (2243), and is provided with a clearance notch (22431); When the number of counts does not reach a preset value, the first limiting protrusion (31) abuts against the outer wall of the second limiting protrusion (2243); when the number of counts reaches a preset value, the clearance notch (22431) moves to be opposite to the first limiting protrusion (31) and gives way, and the locking member (3) is clamped between the rotating member (222) and the counting member (224) under its own elastic force.

Images