CN117521707A - Counting mechanism and spraying device - Google Patents

Abstract

The invention relates to a counting mechanism and a spraying device, wherein the counting mechanism comprises: a counting component for counting; the rotating piece can trigger the counting assembly to count when rotating and can move along the axial direction of the counting assembly; the first driving piece and the second driving piece can move along the axial direction under external force; when the counting mechanism is in an initial state, the rotating piece is meshed with the first driving piece or the second driving piece; the rotating member is reciprocally axially moved to alternately engage the first and second driving members during one reciprocal movement of the first driving member such that the rotating member rotates in one direction to trigger the counting assembly. The counting mechanism is simple and convenient to operate, and simple and compact in structure.

Description

Counting mechanism and spraying device

Technical Field

The invention relates to the technical field of medical equipment, in particular to a counting mechanism and a spraying device.

Background

The atomizing spraying device is a structure capable of atomizing and spraying liquid, and when the atomizing spraying device is used for atomizing a medicine, the medicine is sprayed into atomized particles and sprayed on the affected parts such as the oral cavity, the nasal cavity, eyes and the skin surface, and the like, so that the atomizing spraying device has great effects on the absorption and the curative effect of the medicine. The need to replenish the medication or replace the medication containing bottle or the aerosolization device in time before the medication is exhausted may otherwise affect the continued administration of the medication to the user.

The existing atomizing spraying device is usually provided with a counting mechanism for automatically counting, so that a user can conveniently master the current residual medicine supply times. The counting mechanism in the current market mainly comprises an electronic counting mechanism and a mechanical counting mechanism, wherein the electronic counting mechanism is displayed in an electronic display mode, but a power supply module and a sensor for capturing execution actions are required to be equipped, so that the cost and the size are not easy to control, and the counting mechanism is not suitable for medical devices with short service periods. For the mechanical counting mechanism, the existing mechanical counting mechanism has a complex structure, so that the overall size of the atomizing spraying device is increased, and the cost is increased.

Disclosure of Invention

Based on the above-mentioned drawbacks of the prior art, an object of the present invention is to provide a counting mechanism which is simple and compact in structure, and which is advantageous for a miniaturized design of an injection device when the counting mechanism is used in the injection device.

Therefore, the invention provides the following technical scheme.

The present invention provides a counting mechanism comprising:

a counting component for counting;

the rotating piece can trigger the counting assembly to count when rotating and can move along the axial direction of the counting assembly;

the first driving piece and the second driving piece can move along the axial direction under external force;

when the counting mechanism is in an initial state, the rotating piece is meshed with the first driving piece or the second driving piece; the rotating member is reciprocally axially moved to alternately engage the first and second driving members during one reciprocal movement of the first driving member such that the rotating member rotates in one direction to trigger the counting assembly.

Preferably, when the counting mechanism is in an initial state, the rotating member is engaged with the second driving member;

when the first driving piece moves, the first driving piece drives the rotating piece to synchronously move, and the rotating piece is meshed with the first driving piece after being separated from the second driving piece; when the first driving piece is reset, the rotating piece moves to be separated from the first driving piece and meshed with the second driving piece.

Preferably, when the counting mechanism is in an initial state, the rotating member is engaged with the first driving member;

when the first driving piece moves, the rotating piece is meshed with the second driving piece after being separated from the first driving piece; when the first driving piece resets, the first driving piece drives the rotating piece to move so as to be separated from the second driving piece, and the rotating piece is meshed with the first driving piece.

Preferably, the rotary member further comprises an urging spring for applying an urging force to the first driving member.

Preferably, the counting assembly comprises a screw and an indicator, the indicator is screwed to the screw, and the rotating member is axially movably connected to the screw;

when the rotating piece drives the screw rod to rotate, the indicating piece moves along the axial direction of the screw rod.

Preferably, the screw is provided with a mounting part, and the rotating piece is provided with a mounting hole; the cross section of the mounting part is non-circular, and the cross section of the mounting part is matched with the mounting hole to limit the rotation of the rotating part relative to the screw rod.

Preferably, one of the first and second driving members is disposed around the other.

Preferably, the rotating member includes a shaft body and a first engagement portion;

the first driving piece comprises a first hollow pipe body and a second meshing part, and the second meshing part is connected to one end of the first hollow pipe body, which faces the first meshing part.

Preferably, the second driving member includes a second hollow tube body and a third engagement portion, the first hollow tube body at least partially extends into the second hollow tube body, and the third engagement portion is disposed on an inner wall of the second hollow tube body.

Preferably, the first engagement portion includes a plurality of first teeth, and the plurality of first teeth are sequentially connected along a circumferential direction of the first engagement portion; and/or the number of the groups of groups,

the second meshing part comprises a plurality of second convex teeth, and the plurality of second convex teeth are sequentially connected along the circumferential direction of the second meshing part.

Preferably, the third engagement portion is a projection extending in the axial direction of the second hollow tube body; the third engagement portion is provided with a guide slope for guiding the rotation member to rotate so as to engage with the third engagement portion when the rotation member and the third engagement portion are in contact.

Preferably, the outer wall of the first hollow tube body is provided with a groove which cooperates with the third engagement portion to limit the rotation of the first driving member.

Preferably, the rotating member is located in the second hollow tube body and is in clearance fit with the second hollow tube body.

The present invention also provides an injection device comprising:

an injection mechanism for injecting;

a counting mechanism as described above.

Preferably, the injection mechanism comprises a trigger member, the first driving member being connected to the trigger member; the trigger piece moves under external force to trigger the spraying device to spray.

Preferably, the spraying mechanism comprises a base, the trigger member is axially movably connected to the base, and the second driving member is connected to the base.

The invention has the following technical effects:

the invention provides a counting mechanism, which is characterized in that a first driving piece and a second driving piece are arranged, the position relation between the first driving piece and the second driving piece and a rotating piece is limited, and the rotating piece is limited to axially move under the action of external force, so that the rotating piece can rotate along one direction in the process of alternately meshing with the first driving piece and the second driving piece, and the counting assembly is triggered to count. The rotating part, the first driving part and the second driving part are matched to form a driving mechanism of the counting assembly, the structure is simple and small, the whole size of the counting mechanism is reduced, and finally the whole size of the spraying device can be reduced.

Drawings

FIG. 1 is an exploded view of a partial structure of a spray device of the present invention;

FIG. 2 is a schematic view of the assembled structure of the first driving member and the triggering member of the present invention;

FIG. 3 is a schematic view of an assembled structure of a second driving member and a base of the present invention;

FIG. 4 is a partial cross-sectional view of the counting mechanism of the present invention;

FIG. 5 is a schematic perspective view of a screw according to the present invention;

FIG. 6 is a schematic perspective view of a rotating member according to the present invention;

FIG. 7 is an exploded view of a partial structure of the spraying device of the present invention;

fig. 8 is a schematic perspective view of the spraying device of the present invention.

Description of the reference numerals

100. A spraying device;

1. a spraying mechanism; 12. a trigger; 126. a concave portion; 14. a power storage spring; 15. a base; 155. a through hole; 156. a recessed portion;

5. a mounting shell; 51. a guide groove; 511. a guide protrusion; 52. a window; 53. an indication mark;

6. a counting mechanism;

61. a counting assembly; 611. a screw; 6111. a mounting part; 612. an indicator; 6121. a chute;

62. a rotating member; 621. a shaft body; 6211. a mounting hole; 622. a first engagement portion; 6221. a first lobe;

63. a first driving member; 631. a first hollow tube; 6311. a groove; 632. a second engagement portion; 6321. a second lobe;

64. a second driving member; 641. a second hollow tube; 642. a third engagement portion; 6421. a guide slope;

65. pressing the spring.

Detailed Description

In order to make the technical scheme and the beneficial effects of the invention more obvious and understandable, the following detailed description is given by way of example. Unless defined otherwise, technical and scientific terms used herein have the same meaning as technical and scientific terms in the technical field to which this application belongs.

In the description of the present invention, unless explicitly defined otherwise, terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "height", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., refer to an orientation or positional relationship based on that shown in the drawings, and are merely for convenience of simplifying the description of the present invention, and do not indicate that the apparatus or element referred to must have a specific orientation, be constructed and operated in a specific orientation, i.e., are not to be construed as limiting the present invention.

In the present invention, the terms "first", "second" are used for descriptive purposes only and are not to be construed as relative importance of the features indicated or the number of technical features indicated. Thus, a feature defining "first", "second" may explicitly include at least one such feature. In the description of the present invention, "plurality" means at least two; "plurality" means at least one; unless otherwise specifically defined.

In the present invention, the terms "mounted," "connected," "secured," "disposed," and the like are to be construed broadly, unless otherwise specifically limited. For example, "connected" may be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, or can be communicated between two elements or the interaction relationship between the two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present invention, unless explicitly defined otherwise, a first feature "on", "above", "over" and "above", "below" or "under" a second feature may be that the first feature and the second feature are in direct contact, or that the first feature and the second feature are in indirect contact via an intermediary. Moreover, a first feature "above," "over" and "on" a second feature may be that the first feature is directly above or obliquely above the second feature, or simply indicates that the level of the first feature is higher than the level of the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the level of the first feature is less than the level of the second feature.

The references to "upper" and "lower" in this invention are both made to the designation in fig. 1.

The spraying device of the present invention will be described in detail with reference to fig. 1 to 8.

In this embodiment, as shown in fig. 1 to 4, the injection device 100 includes an injection mechanism 1 and a counting mechanism 6, the counting mechanism 6 includes a counting assembly 61, a rotating member 62, a first driving member 63 and a second driving member 64, the counting assembly 61 is used for counting the injection number of the injection mechanism 1, the rotating member 62 can trigger the counting assembly 61 to count when rotating, the rotating member 62 can move along the axial direction of the counting assembly 61, and the first driving member 63 can move along the axial direction under an external force.

When the counting mechanism 6 is in the initial state, the rotating member 62 is engaged with the first driving member 63 or the second driving member 64; during one reciprocation of the first driving member 63, the rotating member 62 can be axially moved, and thus the rotating member 62 can be alternately engaged with the first driving member 63 and the second driving member 64 such that the rotating member 62 rotates in one direction to trigger the counting assembly 61.

By adopting the above technical solution, by arranging the first driving member 63 and the second driving member 64 and defining the positional relationship between the first driving member 63 and the second driving member 64 and the rotating member 62, the rotating member 62 can rotate along one direction to trigger the counting assembly 61 to count in the process of alternately meshing with the first driving member 63 and the second driving member 64 by axial movement. The rotating member 62, the first driving member 63 and the second driving member 64 cooperate together to form a driving mechanism of the counting assembly 61, which is simple and compact in structure, and is beneficial to reducing the overall size of the counting mechanism 6, and finally reducing the overall size of the injection device 100.

In one embodiment, as shown in fig. 3 and 4, when the counting mechanism 6 is in the initial state, the rotating member 62 is engaged with the second driving member 64, and the first driving member 63, the second driving member 64, and the rotating member 62 are disposed in this order in the axial direction of the rotating member 62. When the first driving member 63 moves axially in a direction toward the rotating member 62 under an external force, after the first driving member 63 moves to contact with the rotating member 62, the first driving member 63 moves together against the rotating member 62 when the first driving member 63 continues to move, so that the rotating member 62 is separated from the second driving member 64, the rotating member 62 does not rotate due to engagement between the rotating member 62 and the second driving member 64 before the rotating member 62 is separated from the second driving member 64, and after the rotating member 62 is separated from the second driving member 64, the rotating member 62 rotates under the interference of the first driving member 63 to engage with the first driving member 63, and at this time, the rotating member 62 rotates by a first angle. When the first driving member 63 is reset, the first driving member 63 moves in a direction away from the rotating member 62, at this time, the rotating member 62 moves synchronously along the axial direction, and when the rotating member 62 moves to contact with the second driving member 64, the first driving member 63 continues to move and the rotating member 62 is blocked by the second driving member 64, so that the rotating member 62 is separated from the first driving member 63, and the rotating member 62 rotates under the interference of the second driving member 64 to engage with the second driving member 64, at this time, the rotating member 62 rotates by a second angle. In this embodiment, during one reciprocation of the first driving member 63, the rotating member 62 rotates by an angle that is the sum of the first angle and the second angle.

Further, as shown in fig. 1, the counting mechanism 6 further includes a pressing spring 65, where the pressing spring 65 is connected to an end of the rotating member 62 facing away from the first driving member 63, and is configured to apply a pressing force to the rotating member 62 toward the first driving member 63. When the counting mechanism 6 is in the initial state, the pressing spring 65 presses the rotating member 62 against the second driving member 64 so as to be able to stably engage with the second driving member 64. When the first driving member 63 drives the rotating member 62 to move synchronously so that the rotating member 62 is separated from the second driving member 64, the pressing spring 65 is compressed; when the first driving member 63 is reset, the pressing spring 65 is sprung back to move the rotating member 62 in the axial direction reversely to abut against the second driving member 64, so that the rotating member 62 can be engaged with the second driving member 64 again.

In still another embodiment, when the counting mechanism 6 is in the initial state, the rotating member 62 is engaged with the first driving member 63, and the second driving member 64, the first driving member 63, and the rotating member 62 are disposed in this order in the axial direction of the rotating member 62 (not shown in the drawing). When the first driving member 63 moves axially in a direction away from the rotating member 62 under an external force, the rotating member 62 moves to contact with the second driving member 64 after being separated from the first driving member 63, and the rotating member 62 rotates to engage with the second driving member 64, and at this time, the rotating member 62 rotates by a third angle; when the first driving member 63 resets, the first driving member 63 moves to contact with the rotating member 62, the first driving member 63 drives the rotating member 62 to move so as to separate from the second driving member 64, and the rotating member 62 rotates under the interference of the first driving member 63 to engage with the first driving member 63, at this time, the rotating member 62 rotates by a fourth angle. In this embodiment, during one reciprocation of the first driving member 63, the rotating member 62 rotates by an angle that is the sum of the third angle and the fourth angle.

Further, the counting mechanism 6 further includes a pressing spring 65 for applying a pressing force to the rotating member 62 toward the first driving member 63, and the pressing spring 65 is connected to an end of the rotating member 62 facing away from the first driving member 63. When the counting mechanism 6 is in the initial state, the pressing spring 65 presses the rotating member 62 against the first driving member 63, so that the rotating member 62 can be stably engaged with the first driving member 63. When the first driving member 63 moves in a direction away from the rotating member 62, the rotating member 62 moves synchronously under the pressing force of the pressing spring 65 until the rotating member 62 moves to contact with the second driving member 64, at this time, the rotating member 62 is blocked by the second driving member 64 and cannot move along with the first driving member 63, the first driving member 63 moves continuously to disengage the rotating member 62 from the first driving member 63, and the rotating member 62 contacts with the second driving member 64 under the pressing force of the pressing spring 65, so that the rotating member 62 rotates to engage with the second driving member 64. When the first driving member 63 is reset, the first driving member 63 moves to contact with the rotating member 62 to drive the rotating member 62 to move synchronously, and after the rotating member 62 is separated from the second driving member 64, the rotating member 62 rotates under the interference of the first driving member 63 to engage with the first driving member 63.

It should be appreciated that the above solution is to cooperate with the rotating member 62 by means of the pressing spring 65, so that the rotating member 62 can also move axially during the axial movement of the first driving member 63, and the pressing spring 65 is simple and compact in structure, easy to assemble and easy to operate. Of course, any other structure having elastic deformation and deformation recovery capability may be used instead of the pressing spring 65 to achieve the above-described function.

In one embodiment, as shown in fig. 1, the counting assembly 61 includes a screw 611 and an indicator 612, the indicator 612 being screwed to the screw 611. The indicator 612 is limited to be unable to rotate with the screw 611 itself, and when the screw 611 is rotated by the rotating member 62, the indicator 612 moves in the axial direction of the screw 611, the position of the indicator 612 changes, and the counting result is indicated by the position of the indicator 612. The rotating member 62 is axially movably coupled to the screw 611 such that the rotating member 62 can axially move reciprocally to alternately engage the first driving member 63 and the second driving member 64.

Further, as shown in fig. 1, 5 and 6, the screw 611 is provided with a mounting portion 6111, and the rotating member 62 is provided with a mounting hole 6211; the cross section of the mounting portion 6111 is non-circular (not limited to triangle, ellipse, square and special-shaped), the mounting hole 6211 is set to be a matched outline, the rotating member 62 is sleeved on the periphery of the mounting portion 6111 through the mounting hole 6211, the mounting portion 6111 is matched with the mounting hole 6211 to limit the rotating member 62 to rotate relative to the screw 611, and the rotating member 62 can drive the screw 611 to rotate synchronously when rotating.

Of course, the assembly structure of the screw 611 and the rotating member 62 is not limited thereto, and the mounting portion 6111 may be cylindrical, and the screw 611 may be synchronously rotated by providing a guide groove and a guide block (not shown) on the mounting portion 6111 and the mounting hole 6211, respectively, the guide groove extending in the axial direction of the screw 611 and the guide groove and the guide block being slidably connected so that the rotating member 62 can be moved in the axial direction, and the rotating member 62 can be rotated while driving the screw 611.

In one embodiment, the first and second drivers 63, 64 are disposed one around the other, which facilitates downsizing the overall size of the counting mechanism 6. Specifically, the first driving member 63 has a tubular or annular structure, and the first driving member 63 is disposed around the second driving member 64; alternatively, as shown in fig. 4, the second driving member 64 is of a tubular or annular structure, and the second driving member 64 is disposed around the first driving member 63.

Further, as shown in fig. 1 and 4, the rotation member 62 includes a shaft body 621 and a first engagement portion 622, and the shaft body 621 is axially movably connected to the screw 611 of the counting assembly 61.

Further, as shown in fig. 2 and 4, the first driving member 63 includes a first hollow tube 631 and a second engagement portion 632, the second engagement portion 632 is connected to an end of the first hollow tube 631 facing the first engagement portion 622, and the first driving member 63 has a simple structure.

Further, as shown in fig. 2 to 4, the second driving member 64 includes a second hollow tube 641 and a third engaging portion 642, and the first hollow tube 631 at least partially extends into the second hollow tube 641, which is beneficial to reducing the overall size of the counting mechanism 6. The third engaging portion 642 is disposed on the inner wall of the second hollow tube 641, and the second engaging portion 632 of the first driving member 63 and the first engaging portion 622 of the rotating member 62 are both disposed in the second hollow tube 641, so that the first engaging portion 622 is engaged with the third engaging portion 642 and the second engaging portion 632 alternately, and the overall size of the counting mechanism 6 is further reduced.

Of course, the mounting positional relationship of the first driving member 63 and the second driving member 64 is not limited thereto, and the second driving member 64 may extend at least partially into the first hollow tube 631 (not shown) of the first driving member 63 with a gap therebetween, and the third engagement portion 642 may be provided on the inner wall of the second hollow tube 641 or on the end of the second hollow tube 641 facing the rotating member 62. In this embodiment, the thickness of the first engaging portion 622 is greater than the thickness of the second engaging portion 632, so that when the first driving member 63 moves axially away from the rotating member 62 under the external force, the rotating member 62 can contact the second driving member 64 after moving toward the second driving member 64 under the urging force of the urging spring 65, so as to achieve the engagement of the rotating member 62 and the second driving member 64.

In an embodiment, as shown in fig. 1, 4 and 6, the first engaging portion 622 includes a plurality of first teeth 6221, and the plurality of first teeth 6221 are sequentially connected along the circumferential direction of the first engaging portion 622, which is simple in structure.

In an embodiment, as shown in fig. 2 and 4, the second engaging portion 632 includes a plurality of second teeth 6321, and the plurality of second teeth 6321 are sequentially connected along the circumferential direction of the second engaging portion 632, which is simple in structure.

In one embodiment, as shown in fig. 3 and 4, the third engaging portion 642 is a bump extending along the axial direction of the second hollow tube 641, and has a simple structure. The third engaging portion 642 is provided with a guide slope 6421, and when the rotary member 62 and the third engaging portion 642 are brought into contact, the rotary member 62 moves along the guide slope 6421 to effect rotation and engagement with the third engaging portion 642, facilitating rapid engagement of the rotary member 62 and the second driving member 64.

Further, as shown in fig. 2 to 4, the outer wall of the first hollow tube 631 is provided with a groove 6311 which cooperates with the third engagement portion 642 to restrict the rotation of the first driving member 63 such that the first driving member 63 can only move axially.

Further, as shown in fig. 2 and 4, the recess 6311 is open toward one side of the rotating member 62, and one end of the third engagement portion 642 can protrude from the opening to engage with the rotating member 62. Of course, the recess 6311 may be provided without an opening, and the third engagement portion 642 may be provided by a structure defining the third engagement portion 642, for example, the third engagement portion 642 may be partially located outside the recess 6311 and extend toward the rotating member 62 (not shown in the drawings) so that the third engagement portion 642 can contact and engage with the rotating member 62 through a portion thereof extending after the first driving member 63 and the rotating member 62 are disengaged.

Further, as shown in fig. 2, the groove depth of the groove 6311 is smaller than the thickness of the second engagement portion 632, so as not to affect the engagement of the second engagement portion 632 and the rotation member 62 by the arrangement of the groove 6311. Of course, the outer wall of the first hollow tube 631 may not be provided with the groove 6311, and a guide structure (such as a guide groove or a guide rib) may be provided on the rest of the injection device 100 to limit the moving direction of the first driving member 63.

In one embodiment, as shown in fig. 3 and 4, the rotating member 62 is disposed in the second hollow tube 641 and is in clearance fit with the second hollow tube, so as to reduce the overall size of the counting mechanism 6.

In one embodiment, as shown in fig. 1 and 2, the spraying mechanism 1 includes a trigger 12, so that a user can operate to trigger spraying, and the trigger 12 moves under an external force to trigger the spraying device 100 to spray. The first driving member 63 is connected to the triggering member 12, and is capable of triggering the counting in real time when the spraying device 100 triggers the spraying, so that the operation is simple and the counting is timely. Further, as shown in fig. 1 and 3, the injection mechanism 1 includes a base 15, the trigger member 12 is axially movably connected to the base 15, and the second driving member 64 is connected to the base 15 for easy assembly.

Further, as shown in fig. 1 and 3, the base 15 is provided with a through hole 155, the bottom of the base 15 is provided with a recess 152, the second driving member 64 is disposed in the recess 152, and the second hollow tube 641 of the second driving member 64 communicates with the through hole 155. The injection mechanism 1 further comprises a bottom cover 9, wherein the bottom cover 9 is detachably connected to the base 15 and closes the opening of the recess 152, so that when the counting mechanism 6 is assembled, one end of the screw 611 sequentially passes through the first hollow pipe 631 and the through hole 155 and then enters the second hollow pipe 641, the rotating member 62 is inserted into the second hollow pipe 641 from the bottom of the base 15 and then assembled with the screw 611, and then the bottom cover 9 is installed, so that the assembly is completed, the assembly is convenient, and the disassembly is convenient.

Further, as shown in fig. 1, the injection mechanism 1 includes a power spring 14, two ends of the power spring 14 are respectively connected to the trigger member 12 and the base 15, and when the trigger member 12 moves towards the base 15 under an external force to trigger injection, the power spring 14 is compressed; when the external force is removed, the power spring 14 springs back to return the trigger 12. When the first driving member 63 is connected to the trigger member 12, the first driving member 63 is reset along with the trigger member 12. Of course, when the first driving member 63 is not connected to the triggering member 12, a reset spring may be further disposed to reset the first driving member 63.

Further, as shown in fig. 1, the trigger 12 is a housing structure, and the trigger 12 and the base 15 together form a cavity for accommodating the internal components of the ejection mechanism 1.

In one embodiment, as shown in FIG. 1, trigger 12 is provided with a recess 126, and injection device 100 includes a mounting housing 5, with mounting housing 5 being coupled to recess 126 and counting assembly 61 being coupled to a side of mounting housing 5 facing trigger 12.

Further, as shown in fig. 7, a guiding groove 51 is provided on one side of the mounting housing 5 facing the counting assembly 61, the guiding groove 51 extends along the axial direction of the screw 611, guiding protrusions 511 are provided on two sides of the inner wall of the guiding groove 51, sliding grooves 6121 are provided on two sides of the indicator 612, the indicator 612 is located in the guiding groove 51, the sliding grooves 6121 on two sides of the indicator 612 are in one-to-one sliding fit with the two guiding protrusions 511, and when the screw 611 rotates, the indicator 612 can only move along the axial direction of the screw 611 under the limit of the guiding groove.

Further, as shown in fig. 7 and 8, the mounting housing 5 is provided with a window 52 or through hole to show where the indicator 612 of the counting assembly 61 is located.

Further, as shown in fig. 8, the mounting housing 5 is provided with an indication mark 53, and the indication mark 53 may be a degree mark or a text mark, and the indication mark 53 is matched with the indication member 612 so as to facilitate accurate counting. Of course, the indicator 53 could also be a simple position marker, with the indicator matching the indicator 612 to achieve a fuzzy count. The index mark 53 may be one, and when the index member 612 is positioned opposite the index mark 53, it indicates that the current number of injections is a preset value. The indication mark 53 may be plural to indicate the condition of the number of injections of different preset values.

It should be understood that the above examples are illustrative and are not intended to encompass all possible implementations encompassed by the claims. Various modifications and changes may be made in the above embodiments without departing from the scope of the disclosure. Likewise, the individual features of the above embodiments can also be combined arbitrarily to form further embodiments of the invention which may not be explicitly described. Therefore, the above examples merely represent several embodiments of the present invention and do not limit the scope of protection of the patent of the present invention.

Claims (16)

1. A counting mechanism, characterized in that the counting mechanism (6) comprises:

a counting assembly (61) for counting;

a rotating member (62) capable of triggering the counting assembly (61) to count when rotating, and the rotating member (62) is capable of moving along the axial direction of the counting assembly (61);

a first driving member (63) and a second driving member (64), the first driving member (63) being movable in the axial direction under an external force;

wherein, when the counting mechanism (6) is in an initial state, the rotating member (62) is engaged with the first driving member (63) or the second driving member (64); during one reciprocation of the first driving member (63), the rotating member (62) is axially moved by the reciprocation to alternately engage with the first driving member (63) and the second driving member (64) so that the rotating member (62) rotates in one direction to trigger the counting assembly (61).

2. A counter mechanism according to claim 1, wherein the rotating member (62) is engaged with the second driving member (64) when the counter mechanism (6) is in an initial state;

when the first driving piece (63) moves, the first driving piece drives the rotating piece (62) to synchronously move, and the rotating piece (62) is meshed with the first driving piece (63) after being separated from the second driving piece (64); when the first driving member (63) is reset, the rotating member (62) moves to be separated from the first driving member (63) and engaged with the second driving member (64).

3. A counter mechanism according to claim 1, wherein the rotating member (62) is engaged with the first driving member (63) when the counter mechanism (6) is in an initial state;

when the first driving piece (63) moves, the rotating piece (62) is meshed with the second driving piece (64) after being separated from the first driving piece (63); when the first driving piece (63) is reset, the first driving piece (63) drives the rotating piece (62) to move so as to be separated from the second driving piece (64), and the rotating piece (62) is meshed with the first driving piece (63).

4. A counting mechanism according to any one of claims 1-3, further comprising an abutment spring (65) for exerting an abutment force on the rotating member (62) towards the first driving member (63).

5. A counting mechanism according to any one of claims 1-3, characterized in that the counting assembly (61) comprises a screw (611) and an indicator (612), the indicator (612) being screwed to the screw (611), the rotating member (62) being axially movably connected to the screw (611);

wherein, when the rotating piece (62) drives the screw rod (611) to rotate, the indicating piece (612) moves along the axial direction of the screw rod (611).

6. Counting mechanism according to claim 5, characterized in that the screw (611) is provided with a mounting (6111) and the rotating element (62) is provided with a mounting hole (6211); the cross section of the mounting part (6111) is a non-perfect circle, which is matched with the mounting hole (6211) to limit the rotation of the rotating member (62) relative to the screw (611).

7. A counting mechanism according to claim 1, wherein one of the first drive member (63) and the second drive member (64) is arranged around the other.

8. The counting mechanism according to claim 7, wherein the rotating member (62) includes a shaft body (621) and a first engaging portion (622);

the first driving member (63) comprises a first hollow tube body (631) and a second engagement portion (632), and the second engagement portion (632) is connected to one end of the first hollow tube body (631) facing the first engagement portion (622).

9. The counting mechanism according to claim 8, wherein the second driving member (64) comprises a second hollow tube body (641) and a third engaging portion (642), the first hollow tube body (631) at least partially extends into the second hollow tube body (641), and the third engaging portion (642) is provided at an inner wall of the second hollow tube body (641).

10. The counting mechanism according to claim 8, wherein the first engagement portion (622) includes a plurality of first teeth (6211), the plurality of first teeth (6211) being connected in sequence along a circumferential direction of the first engagement portion (622); and/or the number of the groups of groups,

the second meshing portion (632) comprises a plurality of second convex teeth (6321), and the plurality of second convex teeth (6321) are sequentially connected along the circumferential direction of the second meshing portion (632).

11. The counting mechanism according to claim 9, wherein the third engagement portion (642) is a projection extending in an axial direction of the second hollow tube (641); the third engaging portion (642) is provided with a guide slope (6421), and the guide slope (6421) is configured to guide the rotating member (62) to rotate so as to engage with the third engaging portion (642) when the rotating member (62) and the third engaging portion (642) are in contact.

12. The counting mechanism according to claim 11, wherein the outer wall of the first hollow tube body (631) is provided with a groove (6311) which cooperates with the third engagement portion (642) to restrict rotation of the first driving member (63).

13. Counting mechanism according to claim 9, characterized in that the rotating member (62) is located in the second hollow tube (641) and the two are in clearance fit.

14. An injection device, characterized in that the injection device (100) comprises:

an injection mechanism for injecting;

a counting mechanism according to any one of claims 1 to 13.

15. The spraying device according to claim 14, characterized in that the spraying mechanism comprises a trigger member (12), the first driving member (63) being connected to the trigger member (12); the trigger piece (12) moves under the external force to trigger the spraying device (100) to spray.

16. The spraying device according to claim 14, characterized in that the spraying mechanism comprises a base (15), the triggering element (12) being axially movably connected to the base (15), the second driving element (64) being connected to the base (15).