Tank assembly

Abstract

The utility model discloses a tank body assembly which comprises a tank body and a cover body assembly, the cover body assembly is detachably arranged on the tank body, and the cover body assembly comprises a first cover body detachably connected with the tank body; the pump head assembly is arranged on the first cover body, and the pump head assembly is provided with a pressing head capable of being pressed; the driving piece is arranged on the pressing head; the indication ring is arranged on the first cover body in a sleeving manner and can rotate relative to the first cover body, and scales are arranged on the peripheral wall of the indication ring; and the linkage assembly is in driving fit with the driving part and the indication ring, and the linkage assembly is configured in the mode that after the pressing head is pressed by preset times every time, the pressing head drives the indication ring to rotate by a preset angle in the first rotation direction through the linkage assembly. According to the tank body assembly, the number of use times can be recorded through the scales of the indicating ring, indirect use amount prompting is achieved, and the use experience is improved while light shielding is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of packaging structure technology, specifically providing a can assembly. Background Technology

[0002] Cosmetics refer to chemical industrial products or fine chemical products that are applied to any part of the human body surface, such as skin, hair, nails, lips, and teeth, by means of smearing, spraying, or other similar methods, to achieve the purpose of cleaning, maintaining, beautifying, modifying and altering appearance, or correcting body odor and maintaining a good condition.

[0003] In the existing technology, cosmetics such as face cream need to be stored away from light. Therefore, the jars used to hold face cream are usually made of opaque materials, which makes it impossible for users to see the remaining amount of face cream and affects the user experience. Utility Model Content

[0004] This invention aims to at least solve the problem that in the prior art, the containers used to hold face cream are usually made of opaque materials, which makes it impossible for users to see the remaining amount of face cream and affects the user experience. The invention proposes a container component.

[0005] This utility model discloses a can assembly, including: a can body and a cover assembly. The can body has an opening, and the cover assembly is detachably mounted on the can body. The cover assembly includes: a first cover detachably connected to the can body; a pump head assembly mounted on the first cover, the pump head assembly having a pressable head; a drive member mounted on the press head; an indicator ring sleeved on the first cover and rotatable relative to the first cover, the outer peripheral wall of the indicator ring having a scale; and a linkage assembly drivingly cooperating with the drive member and the indicator ring respectively. The linkage assembly is configured such that after each preset number of presses on the press head, the press head drives the indicator ring to rotate a preset angle along a first rotation direction via the linkage assembly.

[0006] Optionally, the linkage component includes: a transmission ring, which is disposed around the driving member on the first cover and is rotatable around the driving member; the inner peripheral wall of the transmission ring is provided with a guide structure that cooperates with the driving member; during the pressing of the pressure head, the driving member drives the transmission ring to rotate along the first rotation direction through the guide structure; and a transmission gear, which is rotatably disposed on the first cover and is used to drive and cooperate with the transmission ring, and the transmission gear drives and cooperates with the indicator ring.

[0007] Optionally, the guide structure includes: a plurality of first guide teeth disposed on the inner peripheral wall of the transmission ring and located at one end of the transmission ring near the first cover, for guiding and engaging with the drive member when the pressure head is pressed down, so that the transmission ring rotates along the first rotation direction; and a plurality of second guide teeth disposed on the inner peripheral wall of the transmission ring and located at one end of the transmission ring away from the first cover, for guiding and engaging with the drive member when the pressure head is reset, so that the transmission ring rotates along the first rotation direction.

[0008] Optionally, a positioning groove is formed between every two adjacent second guide teeth, and each first guide tooth corresponds to one second guide tooth and one positioning groove.

[0009] Optionally, the driving component includes: a driving ring, the inner peripheral wall of which is fixedly connected to the pressure head; and a guide block, disposed on the outer peripheral wall of the driving ring and located between the first guide tooth and the second guide tooth, wherein the guide block engages with the first guide tooth when the pressure head is pressed down, and engages with the second guide tooth when the pressure head is reset.

[0010] Optionally, the cover assembly further includes: a limiting cover, which is fastened to the first cover, the limiting cover having a clearance hole, the pressure cap and the driving member passing through the clearance hole, the transmission ring being located inside the limiting cover, the transmission ring being circumferentially rotatable relative to the limiting cover and axially locked.

[0011] Optionally, the inner peripheral wall of the indicator ring is provided with internal teeth, and the transmission gear meshes with the internal teeth; the outer wall of the transmission ring is provided with multiple external teeth, which are spaced apart along the circumference of the transmission ring, and the spacing between two adjacent external teeth satisfies the following: after one external tooth engages with the transmission gear, the pressure head is pressed a preset number of times before the other external tooth engages with the transmission gear.

[0012] Optionally, the pump head assembly includes: a pump head, which is disposed on the first cover; a pressure head, which includes a connecting post and a pressing cover, wherein the connecting post is connected inside the pressing cover and is connected to the pump head, and the driving component is sleeved on the connecting post.

[0013] Optionally, the cover assembly further includes: a second cover fitted onto the outer periphery of the first cover, the indicator ring being located between the second cover and the first cover, and the second cover having a window for limiting the scale of the indicator ring.

[0014] Optionally, the cover assembly further includes: a one-way limiting member disposed on the first cover and engaging with the indicator ring in a second rotation direction opposite to the first rotation direction, so that the indicator ring can only rotate in the first rotation direction.

[0015] The can assembly of this utility model has a driving component on the pressure head, and the driving component is driven and cooperates with the indicator ring through a linkage component. After the pressure head is pressed a preset number of times, the pressure head drives the indicator ring to rotate a preset angle along the first rotation direction through the linkage component. Thus, the number of times it is used can be recorded through the scale of the indicator ring, realizing the indirect indication of the amount used. While ensuring light protection, it improves the user experience. Attached Figure Description

[0016] The preferred embodiments of this utility model are described below with reference to the accompanying drawings, in which:

[0017] Figure 1 This is a structural schematic diagram of the tank assembly of this utility model;

[0018] Figure 2 This is a cross-sectional view of the lid assembly of the tank assembly of this utility model;

[0019] Figure 3 This is a schematic diagram of the linkage component of the tank assembly of this utility model;

[0020] Figure 4 This is a perspective view of the linkage component of the tank assembly of this utility model;

[0021] Figure 5 This is a diagram showing the fit between the drive component and the transmission ring of the tank assembly of this utility model.

[0022] Figure 6 This is a schematic diagram of the pump head assembly of the tank assembly of this utility model;

[0023] Figure 7 This is a perspective view of the pump head assembly of the tank assembly of this utility model;

[0024] Figure 8 This is a schematic diagram of the interaction between the indicator ring and the linkage component of the tank assembly of this utility model;

[0025] Figure 9 This is a cross-sectional view of the first cover of the tank assembly of this utility model;

[0026] Figure 10 This is a perspective view of the lid assembly of the tank assembly of this utility model;

[0027] List of reference numerals in the attached diagram:

[0028] 10. First cover; 11. Center hole; 12. Limiting ring; 13. Annular groove; 14. Boss; 15. Assembly groove; 16. Connecting eaves; 20. Pump head assembly; 21. Pressure head; 211. Connecting column; 212. Press cover; 22. Pump head; 30. Driving component; 31. Driving ring; 32. Guide block; 321. First mating surface; 322. Second mating surface; 40. Indicator ring; 41. Internal teeth; 50. 51. Linkage component; 51. Transmission ring; 511. First guide tooth; 5111. First guide surface; 512. Second guide tooth; 5121. Second guide surface; 513. External tooth; 514. Positioning groove; 52. Transmission gear; 60. Limit cover; 61. Clearance hole; 70. Second cover; 71. Viewing window; 80. One-way limit component; 81. Snap ring; 82. Ratchet; 100. Tank body; 200. Cover assembly. Detailed Implementation

[0029] The present invention will be further described below with reference to the embodiments, but the scope of protection of the present invention is not limited to the contents of the specification.

[0030] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0031] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such terms can be used interchangeably where appropriate for the embodiments of the utility model described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0032] It should be noted that in the description of this utility model, the terms "upper," "lower," "left," "right," "inner," and "outer," which indicate directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. These are merely for ease of description and do not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0033] Furthermore, it should be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "setting," and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection, an indirect connection through an intermediate medium, or a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0034] like Figures 1 to 10 As shown, this utility model discloses a can assembly, including: a can body 100 and a cover assembly 200. The can body 100 is provided with an opening, and the cover assembly 200 is detachably disposed on the can body 100.

[0035] like Figure 2 As shown, the cover assembly 200 includes: a first cover 10, a pump head assembly 20, a drive member 30, an indicator ring 40, and a linkage assembly 50. The first cover 10 is detachably connected to the tank body 100; the pump head assembly 20 is disposed on the first cover 10 and has a pressable head 21; the drive member 30 is disposed on the head 21; the indicator ring 40 is sleeved on the first cover 10 and is rotatable relative to the first cover 10, and a scale is provided on the outer peripheral wall of the indicator ring 40; the linkage assembly 50 drives and cooperates with the drive member 30 and the indicator ring 40 respectively, and the linkage assembly 50 is configured such that after each preset number of presses on the head 21, the head 21 drives the indicator ring 40 to rotate a preset angle along a first rotation direction through the linkage assembly 50.

[0036] Taking face cream as an example, when using it, the face cream is pumped out of the container 100 by pressing the pump head 21. The total amount of face cream in the container 100 is fixed, and the amount of face cream pumped out by the pump head assembly 20 each time the pump head 21 is pressed is also basically fixed. Therefore, by calculation, the maximum number of times the face cream in the container 100 can be used, that is, the number of presses required to pump out all the face cream in the container 100, can be determined.

[0037] After obtaining the maximum number of uses of the face cream in the container 100, a drive component 30 is set on the press head 21, and the drive component 30 is driven to cooperate with the indicator ring 40 through the linkage component 50. After the press head 21 is pressed a preset number of times, the press head 21 drives the indicator ring 40 to rotate a preset angle along the first rotation direction through the linkage component 50. Thus, the number of uses can be recorded through the scale of the indicator ring 40, thereby realizing the indirect indication of the amount used.

[0038] For example, if the maximum number of uses for the face cream is 200, 200 graduations can be set on the indicator ring 40, with each press of the pump head 21 causing the indicator ring 40 to rotate one graduation. Alternatively, 100 graduations can be set on the indicator ring 40, with each two presses of the pump head 21 causing the indicator ring 40 to rotate one graduation. Or, 50 graduations can be set on the indicator ring 40, with each four presses of the pump head 21 causing the indicator ring 40 to rotate one graduation. In other words, the correspondence between the number of presses of the pump head 21 and the rotation of the indicator ring 40 one graduation can be selected according to the actual situation.

[0039] The can body 100 of this utility model is assembled by setting a driving component 30 on the pressure head 21, and the driving component 30 is driven and cooperated with the indicator ring 40 through the linkage component 50. After the pressure head 21 is pressed a preset number of times, the pressure head 21 drives the indicator ring 40 to rotate a preset angle along the first rotation direction through the linkage component 50. Thus, the number of uses can be recorded through the scale of the indicator ring 40, realizing the indirect indication of the amount used. While ensuring light protection, it improves the user experience.

[0040] like Figure 2 As shown, the linkage component 50 includes a transmission ring 51 and a transmission gear 52. The transmission ring 51 is disposed around the driving member 30 on the first cover 10 and is rotatable around the driving member 30. A guide structure that cooperates with the driving member 30 is provided on the inner peripheral wall of the transmission ring 51. During the pressing process of the pressure head 21, the driving member 30 drives the transmission ring 51 to rotate in a first rotation direction through the guide structure. The transmission gear 52 is rotatably disposed on the first cover 10 and is used to drive the transmission ring 51. The transmission gear 52 also drives the indicator ring 40. By providing a guide mechanism on the transmission ring, during the pressing process of the pressure head 21, the driving member 30, through cooperation with the guide structure, causes the transmission ring 51 to rotate in the first rotation direction, thereby driving the transmission gear 52 to rotate, and ultimately driving the indicator ring 40 to rotate, thus achieving the effect of recording the number of uses.

[0041] like Figure 3 and Figure 4As shown, the guide structure includes multiple first guide teeth 511 and multiple second guide teeth 512. The first guide teeth 511 are circumferentially disposed on the inner circumferential wall of the transmission ring 51 and located at the end of the transmission ring 51 closest to the first cover 10. They are used to guide and engage with the drive member 30 when the pressure head 21 presses down, so that the transmission ring 51 rotates in the first rotation direction. The second guide teeth 512 are circumferentially disposed on the inner circumferential wall of the transmission ring 51 and located at the end of the transmission ring 51 furthest from the first cover 10. They are used to guide and engage with the drive member 30 when the pressure head 21 resets, so that the transmission ring 51 rotates in the first rotation direction.

[0042] A positioning groove 514 is formed between every two adjacent second guide teeth 512, and each first guide tooth 511 corresponds to one second guide tooth 512 and one positioning groove 514. Figure 3 As shown, each first guide tooth 511 has an inclined first guide surface 5111, and each second guide tooth 512 has a second guide surface 5121.

[0043] When the pressure head 21 is pressing down, the first guide tooth 511 engages with the drive member 30 to guide the transmission ring 51 to rotate in the first rotation direction. When the pressure head 21 is lifted and reset, the second guide tooth 512 engages with the drive member 30 to guide the transmission ring 51 to continue rotating in the first rotation direction. This converts the reciprocating movement of the pressure head 21 into the rotation of the rotating ring, causing the drive ring 31 to drive the transmission gear 52 to rotate, which in turn drives the indicator ring 40 to rotate.

[0044] like Figures 5 to 7 As shown, the driving component 30 includes a driving ring 31 and a guide block 32. The inner peripheral wall of the driving ring 31 is fixedly connected to the pressure head 21; the guide block 32 is disposed on the outer peripheral wall of the driving ring 31 and located between the first guide tooth 511 and the second guide tooth 512. When the pressure head 21 is pressed down, the guide block 32 guides and engages with the first guide tooth 511, and when the pressure head 21 is reset, the guide block 32 guides and engages with the second guide tooth 512.

[0045] When the pressure head 21 is pressed down, the drive ring 31 moves down synchronously with the pressure head 21. At this time, the guide block 32 moves closer to the first cover 10 and slides with the first guide surface 5111 of the first guide tooth 511, causing the transmission ring 51 to rotate in the first rotation direction. At the same time, the second guide surface 5121 of a second guide tooth 512 is driven to the position corresponding to the guide block 32. When the pressure head 21 is released, the drive ring 31 moves upward synchronously with the pressure head 21. At this time, the guide block 32 moves away from the first cover 10 and slides with the second guide surface 5121 of the second guide tooth 512. At this time, the guide block 32 causes the transmission ring 51 to rotate in the first rotation direction until the pressure head 21 is reset. Then, the guide block 32 enters the positioning groove 514 and corresponds to the first guide surface 5111 of the next first guide tooth 511. Since the drive ring 31 rotates continuously, in order to ensure reliable cooperation between the guide block 32 and the first guide tooth 511 and the second guide tooth 512, there are multiple first guide teeth 511 and second guide teeth 512. All first guide teeth 511 and second guide mechanisms are distributed in a ring around the rotation axis of the drive ring 31.

[0046] The guide block 32 is provided with a first mating surface 321 and a second mating surface 322. The first mating surface 321 is slidably engaged with the first guide surface 5111, and the second mating surface 322 is slidably engaged with the second guide surface 5121, so as to realize better rotation of the transmission ring 51.

[0047] like Figure 8 As shown, the inner circumferential wall of the indicator ring 40 is provided with internal teeth 41, and the transmission gear 52 meshes with the internal teeth 41. It should be noted that one part of the inner circumferential wall of the indicator ring 40 is the meshing section with internal teeth 41, and the other part is a blank section; that is, the other part of the inner circumferential wall of the indicator ring 40 is not provided with internal teeth 41, and the length of the meshing section matches the scale setting range. Therefore, when the scale range is exceeded, the indicator ring 40 disengages from the transmission gear 52, thereby stopping rotation and not affecting the continued use of the pump head assembly 20.

[0048] like Figure 4 and Figure 8As shown, the outer wall of the transmission ring 51 is provided with multiple external teeth 513, which are spaced apart circumferentially along the transmission ring 51. The spacing between two adjacent external teeth 513 satisfies the following condition: after one external tooth 513 engages with the transmission gear 52, the pressure head 21 is pressed a preset number of times before another external tooth 513 engages with the transmission gear 52. In other words, there is a gap between adjacent external teeth 513 on the outer wall of the transmission ring 51. When the transmission gear 52 is located between two external teeth 513, the indicator ring 40 will not rotate even if the pressure head 21 is pressed. Therefore, in actual production, the number and spacing of the external teeth 513 can be set according to the total number of presses. For example, if there are many external teeth 513 and the intervals between adjacent external teeth 513 are small, then only a few presses of the pressure head 21 may be needed to rotate the indicator ring 40 once; conversely, if there are few external teeth 513 and the intervals between adjacent external teeth 513 are large, then only a few presses of the pressure head 21 may be needed to rotate the indicator ring 40 once. Therefore, if the maximum number of uses is high, this method can reduce the number of rotations of the indicator ring 40, thereby reducing the number of scales and improving manufacturing efficiency.

[0049] like Figure 2 As shown, the cover assembly 200 also includes a limiting cover 60, which is fastened to the first cover 10. The limiting cover 60 is provided with a clearance hole 61, through which the pressure head 21 and the driving member 30 pass. The transmission ring 51 is located inside the limiting cover 60 and is rotatable relative to the limiting cover 60, and is axially locked in place. By setting the limiting cover 60, the rotation of the transmission ring 51 is ensured while the transmission ring 51 is restricted from disengaging from the first cover 10, thereby preventing the pressure head 21 from lifting the transmission ring 51 when resetting, thus improving the reliability of the cover assembly 200.

[0050] like Figure 9 As shown, the top of the first cover 10 has a through-hole 11, and a limiting ring 12 is provided around the central hole 11. An annular groove 13 is provided on the outer periphery of the limiting ring 12. A transmission ring 51 is disposed between the limiting ring 12 and the central hole 11. One end of the limiting cover 60 is fixedly connected to the annular groove 13.

[0051] The bottom of the first cover 10 is provided with a boss 14, and a central hole 11 passes through the boss 14. An assembly groove 15 is formed between the outer peripheral wall of the boss 14 and the inner peripheral wall of the first cover 10. The top of the tank body 100 is connected to the assembly groove 15 and is threaded to the inner wall of the assembly groove 15. A connecting eave 16 is provided on the outer peripheral wall of the first cover 10.

[0052] like Figure 6As shown, the pump head assembly 20 includes a pump head 22. The pump head 22 passes through the central hole 11 of the first cover 10; the pressure head 21 includes a connecting post 211 and a pressing cover 212. The connecting post 211 is connected inside the pressing cover 212 and is connected to the pump head 22. The driving member 30 is sleeved on the connecting post 211.

[0053] like Figure 1 and Figure 10 As shown, the cover assembly 200 further includes a second cover 70. The second cover 70 is fitted onto the connecting flange 16 on the outer periphery of the first cover 10, and the indicator ring 40 is located between the second cover 70 and the first cover 10, as shown. Figure 10 As shown, the second cover 70 has a window 71 for limiting the scale of the indicator ring 40. By setting the window 71, the scale of the indicator ring 40 can be displayed through the window, making it convenient for the user to observe the current number of presses.

[0054] like Figure 8 As shown, the cover assembly 200 further includes a one-way limiting member 80. The one-way limiting member 80 is disposed on the first cover 10 and engages with the indicator ring 40 in a second rotation direction opposite to the first rotation direction, thereby limiting the rotation of the indicator ring 40 to the first rotation direction. The one-way limiting member 80 includes a retaining ring 81 and a ratchet 82. The retaining ring 81 is fixedly connected to the first cover 10 and located on the inner circumference of the indicator ring 40. The ratchet 82 is elastically connected to the retaining ring 81 and engages with the inner teeth 41. When the indicator ring 40 rotates in the first rotation direction, the ratchet 82 is pushed open by the inner teeth 41, thus allowing the indicator ring 40 to rotate in the first rotation direction. When the indicator ring 40 rotates in the second direction, the inner teeth 41 abut against the ratchet 82, thereby limiting the rotation in the second direction and preventing the indicator ring 40 from flipping and affecting the accuracy of the counting.

[0055] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0056] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways, rotated 90 degrees, or in other orientations, and the spatial relative descriptions used herein will be interpreted accordingly.

[0057] In the description of this utility model, it should be understood that the directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner and outer contours of each component itself.

[0058] The technical solution of this utility model has been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the protection scope of this utility model is obviously not limited to these specific embodiments. Without departing from the principle of this utility model, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the protection scope of this utility model.

Claims

1. A tank assembly, comprising: A can body (100) and a lid assembly (200), wherein the can body (100) has an opening, and the lid assembly (200) is detachably disposed on the can body (100), characterized in that the lid assembly (200) comprises: The first cover (10) is detachably connected to the tank (100); A pump head assembly (20) is disposed on the first cover (10), the pump head assembly (20) having a pressable pressure head (21); A drive element (30) is disposed on the pressure head (21); An indicator ring (40) is fitted onto the first cover (10) and is rotatable relative to the first cover (10). The outer peripheral wall of the indicator ring (40) is provided with a scale. The linkage component (50) is driven and cooperates with the drive component (30) and the indicator ring (40) respectively, and the linkage component (50) is configured such that after each preset number of presses on the pressure head (21), the pressure head (21) drives the indicator ring (40) to rotate a preset angle along the first rotation direction through the linkage component (50).

2. The tank assembly according to claim 1, characterized in that, The linkage component (50) includes: A transmission ring (51) is disposed on the first cover (10) surrounding the driving member (30), and the transmission ring (51) is rotatable around the driving member (30). A guide structure that cooperates with the driving member (30) is provided on the inner peripheral wall of the transmission ring (51). During the pressing process of the pressure head (21), the driving member (30) drives the transmission ring (51) to rotate along the first rotation direction through the guide structure. A transmission gear (52) is rotatably mounted on the first cover (10) for driving engagement with the transmission ring (51), and the transmission gear (52) drives engagement with the indicator ring (40).

3. The tank assembly according to claim 2, characterized in that, The guiding structure includes: Multiple first guide teeth (511) are arranged circumferentially on the inner peripheral wall of the transmission ring (51) and located at one end of the transmission ring (51) near the first cover (10), for guiding and engaging with the drive member (30) when the pressure head (21) is pressed down, so that the transmission ring (51) rotates in the first rotation direction; Multiple second guide teeth (512) are arranged circumferentially on the inner peripheral wall of the transmission ring (51) and located at one end of the transmission ring (51) away from the first cover (10), for guiding engagement with the drive member (30) when the pressure head (21) is reset, so that the transmission ring (51) rotates in the first rotation direction.

4. The tank assembly according to claim 3, characterized in that, A positioning groove (514) is formed between every two adjacent second guide teeth (512), and each first guide tooth (511) corresponds to one second guide tooth (512) and one positioning groove (514).

5. The tank assembly according to claim 3, characterized in that, The driving element (30) includes: The drive ring (31) has its inner circumferential wall fixedly connected to the pressure head (21); A guide block (32) is disposed on the outer peripheral wall of the drive ring (31) and located between the first guide tooth (511) and the second guide tooth (512). The guide block (32) guides and engages with the first guide tooth (511) when the pressure head (21) is pressed down, and guides and engages with the second guide tooth (512) when the pressure head (21) is reset.

6. The tank assembly according to claim 3, characterized in that, The cover assembly (200) also includes: A limiting cover (60) is fastened to the first cover (10). The limiting cover (60) is provided with a clearance hole (61). The pressure head (21) and the driving member (30) pass through the clearance hole (61). The transmission ring (51) is located inside the limiting cover (60). The transmission ring (51) is rotatable relative to the limiting cover (60) in the circumferential direction and is in a limiting fit in the axial direction.

7. The tank assembly according to claim 2, characterized in that, The inner peripheral wall of the indicator ring (40) is provided with internal teeth (41), and the transmission gear (52) meshes with the internal teeth (41); The outer wall of the transmission ring (51) is provided with a plurality of external teeth (513), which are spaced apart circumferentially along the transmission ring (51). The spacing between two adjacent external teeth (513) satisfies the following: after one of the external teeth (513) is driven to engage with the transmission gear (52), the pressure head (21) is pressed a preset number of times, and then the other external tooth (513) is driven to engage with the transmission gear (52).

8. The tank assembly according to claim 1, characterized in that, The pump head assembly (20) includes: The pump head (22) is mounted on the first cover (10); The pressure head (21) includes a connecting post (211) and a pressing cover (212). The connecting post (211) is connected inside the pressing cover (212). The connecting post (211) is connected to the pump head (22). The driving component (30) is sleeved on the connecting post (211).

9. The tank assembly according to claim 8, characterized in that, The cover assembly (200) also includes: The second cover (70) is fitted onto the outer periphery of the first cover (10), and the indicator ring (40) is located between the second cover (70) and the first cover (10). The second cover (70) has a window for limiting the scale of the indicator ring (40).

10. The tank assembly according to claim 1, characterized in that, The cover assembly (200) also includes: A one-way limiting member (80) is disposed on the first cover (10) and engages with the indicator ring (40) in a second rotation direction opposite to the first rotation direction, so that the indicator ring (40) can only rotate in the first rotation direction.

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