Smearing device

Abstract

The utility model relates to the technical field of cosmetics, and discloses a smearing device which comprises a base, a rotating pipe and a smearing head, and the base comprises a liquid inlet hole allowing liquid to flow through the base; the rotating pipe is mounted on the base, can rotate relative to the base and is provided with a flow channel for liquid to flow through; the smearing head is installed at the end, away from the base, of the rotating pipe, and a liquid outlet hole is formed in the smearing head and communicates with the flow channel; the rotating pipe rotates relative to the base, so that the smearing device has a smearing state in which the liquid inlet hole communicates with the flow channel and a closed state in which the flow channel and the liquid outlet hole are staggered; the smearing head comprises a first face deviating from the base, the preset straight line penetrates through the lowest point and the highest point of the first face, and the width of the smearing head is increased and then decreased from the lowest point of the first face to the highest point of the first face in the direction parallel to the first face and perpendicular to the preset straight line. The on-off state of the flow channel is changed by rotating the rotating pipe, so that the flow channel is closed conveniently, and the phenomenon of cosmetic leakage of the smearing device is prevented.

Description

Technical Field

[0001] This application relates to the field of cosmetic technology, and more particularly to an application device. Background Technology

[0002] Liquid cosmetics typically have a lighter texture, better spreadability, and better skin integration, creating a natural and radiant makeup look, making them highly popular in the makeup and skincare industries.

[0003] Currently, the main methods for applying liquid cosmetics on the market include: (1) using a flocked brush head, where the flocked brush head picks up the cosmetic liquid and then applies it to the patient's skin surface; however, the flocked brush head is prone to getting dust or lip skin debris during use, and it is inconvenient to clean and is prone to mold. (2) using a metal applicator head, where the cosmetic liquid in the container flows to the metal applicator head and is then applied to the patient's skin surface through the metal applicator head; however, the metal applicator head cannot be closed during use, which can easily lead to leakage of the cosmetic liquid. Utility Model Content

[0004] This application provides an application device that can be adjusted to prevent cosmetic leakage as needed.

[0005] To achieve the above objectives, the main technical solutions adopted in this application include:

[0006] This application provides an applicator, including a base, a rotating tube, and an applicator head. The base includes an inlet hole for liquid to flow through it. The rotating tube is mounted on the base and has rotational freedom relative to the base. Along the axial direction of the rotating tube, it has a flow channel for liquid to flow through. The applicator head is mounted on the end of the rotating tube away from the base, and an outlet hole is formed inside the applicator head, which communicates with the flow channel. The rotating tube rotates relative to the base, such that the applicator head includes an applicator state in which the inlet hole and the flow channel communicate, and a closed state in which the flow channel and the inlet hole are misaligned. The applicator head includes a first surface away from the base, and a preset straight line is defined. The preset straight line passes through the lowest point and the highest point of the first surface. Along a direction parallel to the first surface and perpendicular to the preset straight line, the width of the applicator head increases from the lowest point of the first surface to the highest point and then decreases.

[0007] Furthermore, along a preset straight line, the first surface includes a first arc-shaped portion and a second arc-shaped portion, the radius of the first arc-shaped portion being smaller than the radius of the second arc-shaped portion.

[0008] Furthermore, the first surface is symmetrical about the pre-defined straight line.

[0009] Furthermore, the ratio of the maximum thickness perpendicular to the first surface to the distance between the lowest and highest points of the first surface is 0.15 to 0.35.

[0010] Furthermore, the sidewall of the rotating tube is formed with a flow channel hole, which is connected to the flow channel; when the applicator is in the applicator state, the liquid inlet hole is connected to the flow channel through the flow channel hole; when the applicator is in the closed state, the flow channel hole and the liquid inlet hole are misaligned, and the sidewall of the rotating tube abuts against the liquid inlet hole.

[0011] Furthermore, the flow channel includes a first flow channel section and a second flow channel section through which the liquid flows sequentially. The inner diameter of the first flow channel section is larger than the inner diameter of the second flow channel section, and the second flow channel section is connected to the liquid outlet.

[0012] Furthermore, the base also includes a mounting cavity extending in a direction away from the applicator head; the rotating tube extends at least partially into the mounting cavity, through which the rotating tube is mounted on the base, and the rotating tube has a rotational degree of freedom to rotate relative to the mounting cavity.

[0013] Furthermore, the base also includes a mounting cavity extending away from the applicator head, with the flow channel extending at least partially into the mounting cavity; the liquid inlet is connected to the mounting cavity.

[0014] Furthermore, the base also includes a mounting cavity extending away from the applicator head, and a rotation limiting groove is formed inside the mounting cavity; a limiting block is formed on the rotating tube, and the limiting block is installed in the rotation limiting groove.

[0015] Furthermore, the rotating limiting groove includes at least one limiting surface; when one side wall of the limiting block abuts against the limiting surface, the liquid inlet hole communicates with the flow channel.

[0016] Furthermore, the applicator includes a housing mounted on a base and having a rotational degree of freedom to rotate relative to the base; the housing is connected to a rotating tube to rotate the rotating tube via the housing.

[0017] Furthermore, a connecting plate is formed on the side wall of the rotating tube, and the connecting plate extends radially along the rotating tube; a slot is formed inside the outer casing, and the connecting plate is inserted into the slot so that the outer casing is connected to the rotating tube.

[0018] Furthermore, an annular groove is formed on the base; a limiting ring is formed inside the outer shell, and the limiting ring is installed in the annular groove to rotatably mount the outer shell on the base.

[0019] Furthermore, an opening is formed at the end of the outer shell away from the base, through which the applicator extends to the outside of the outer shell; along the direction perpendicular to the plane where the opening is located, the projection of the opening is located within the projection of the applicator.

[0020] Furthermore, the applicator also includes a connecting pad located between the applicator head and the rotating tube, and the connecting pad is sealed to the opening.

[0021] Furthermore, a liquid passage hole is formed on the connecting pad, which is connected to the flow channel and the liquid outlet hole respectively.

[0022] Furthermore, a connecting slope is formed at the end of the rotating tube away from the base, and the connecting slope is inclined relative to the axis of the rotating tube; the applicator head is installed on the connecting slope.

[0023] Furthermore, along the direction perpendicular to the first surface, the cross-sectional area of ​​the applicator head parallel to the first surface first increases and then decreases from the side facing the rotating tube toward the first surface.

[0024] By rotating the rotary tube, the flow path can be switched on and off, thus closing the flow path and preventing cosmetic leakage from the application device. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the application device provided in this application.

[0027] Figure 2 yes Figure 1 A cross-sectional view of the application device shown.

[0028] Figure 3 yes Figure 1 A schematic diagram of the coating device with its outer shell removed.

[0029] Figure 4 yes Figure 3 A schematic diagram of the structure after being rotated at a certain angle.

[0030] Figure 5 yes Figure 1 A schematic diagram of the base of the application device shown.

[0031] Figure 6 yes Figure 5 A schematic diagram of the structure after being rotated at a certain angle.

[0032] Figure 7 yes Figure 1 A schematic diagram of the outer casing of the application device shown.

[0033] Figure 8 yes Figure 1 The diagram shows an alternative implementation of the application device with the outer casing removed. In this example, the cross-sectional area of ​​the application head increases and then decreases from bottom to top.

[0034] Figure 9 yes Figure 8 A cross-sectional view of the application device shown.

[0035] Explanation of reference numerals in the attached drawings: Base 1, Liquid inlet 101, Mounting cavity 102, Rotary limiting groove 1021, Limiting surface 10211, Annular groove 103, Extension 104, Rotating tube 2, Flow channel 201, First flow channel section 2011, Second flow channel section 2012, Flow channel hole 202, Limiting block 203, Connecting plate 204, Connecting slope 205, Connecting block 206, Support plate 207, Applying head 3, Liquid outlet 301, First surface 302, First arc-shaped part 3021, Second arc-shaped part 3022, Outer shell 4, Limiting ring 401, Opening 402, Slot 403, Connecting pad 5, Liquid passage hole 501, Preset straight line 10. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0037] like Figure 1 and Figure 2 As shown, as one implementation, this application provides an application device, including a base 1, a rotating tube 2, and an application head 3. The base 1 is used to install on a container, the rotating tube 2 is installed on the base 1, and the application head 3 is installed at the end of the rotating tube 2 away from the base 1. The liquid (cosmetic liquid) in the container flows sequentially through the base 1 and the rotating tube 2 and then flows to the surface of the application head 3, thereby applying and applying makeup to the user's skin surface through the application head 3.

[0038] Specifically, the base 1 includes an inlet hole 101 for liquid to flow through the base 1. The liquid in the container flows through the inlet hole 101 through the base 1 and then into the rotating tube 2.

[0039] The rotating tube 2 is mounted on the base 1, and the rotating tube 2 has a rotational degree of freedom to rotate relative to the base 1, that is, the rotating tube 2 can rotate relative to the base 1.

[0040] Along the axial direction of the rotating tube 2, the rotating tube 2 has a flow channel 201 for liquid to flow through, and the liquid in the container flows into the flow channel 201 after passing through the liquid inlet 101.

[0041] The applicator head 3 is installed at the end of the rotating tube 2 away from the base 1. A liquid outlet hole 301 is formed inside the applicator head 3. The liquid outlet hole 301 is connected to the flow channel 201 and extends through the applicator head 3 so that the liquid in the flow channel 201 can flow to the surface of the applicator head 3 through the liquid outlet hole 301.

[0042] The rotating tube 2 rotates relative to the base 1, so that the applicator includes an applicator state for applying liquid and a closed state for turning off the applicator, and the state of the applicator is changed by rotating the rotating tube 2 relative to the base 1.

[0043] When the applicator is in the applicator state, the liquid inlet 101 is connected to the flow channel 201 so that the liquid in the container can flow through the liquid inlet 101, the flow channel 201 and the liquid outlet 301 in sequence and then flow to the surface of the applicator head 3, thereby facilitating the application of the liquid to the user's skin surface through the applicator head 3.

[0044] When the applicator is in the closed state, the flow channel 201 is misaligned with the liquid inlet 101, and the outer wall of the rotating tube 2 abuts against the liquid inlet 101. The outer wall of the rotating tube 2 closes the opening of the flow channel 201 toward the base 1, thereby closing the applicator and preventing the liquid in the container from leaking through the applicator.

[0045] Furthermore, the applicator head 3 also includes a first surface 302 facing away from the base 1, defining a preset straight line 10. The preset straight line 10 passes through the lowest point and the highest point of the first surface 302. Along the direction parallel to the first surface 302 and perpendicular to the preset straight line 10, the width of the applicator head 3 increases from the lowest point of the first surface 302 to the highest point and then decreases. By setting the first surface 302 with gradually changing width, it is easier to improve the user comfort of the applicator head 3 and improve the application uniformity of the applicator head 3.

[0046] To more clearly illustrate the technical solution of this application, the following definitions are provided: Figure 1 The upward and downward directions are shown. The axial direction of base 1 is... Figure 1 The up and down directions in the middle.

[0047] As one implementation method, along the preset straight line 10, the first surface 302 includes a first arc-shaped portion 3021 and a second arc-shaped portion 3022. The radius of the first arc-shaped portion 3021 is smaller than the radius of the second arc-shaped portion 3022. That is, the first surface 302 is teardrop-shaped. Specifically, one end of the first surface 302 is formed into a pointed tip, which is used to handle details. The other end is obliquely connected to a wider semi-ellipse, which can contact the skin over a larger area to spread the material evenly.

[0048] The teardrop-shaped first surface 302 can improve the user comfort of the applicator head 3 and improve the applicator head 3's applicator efficiency. As another implementation, the first surface 302 is elliptical. Similarly, the elliptical first surface 302 can improve the user comfort of the applicator head 3 and improve the applicator head 3's applicator uniformity.

[0049] As one implementation, the first surface 302 is symmetrical about the preset straight line 10. When the applicator 3 is applying the product, its movement direction is perpendicular to the preset straight line 10 or tilted relative to the preset straight line 10. By using the first surface 302 which is symmetrical about the preset straight line 10, the consistency of the product application during the back-and-forth application process of the applicator 3 can be improved.

[0050] As one implementation, the ratio of the maximum thickness of the vertical first surface 302 to the distance between the lowest and highest points of the first surface 302 is 0.15 to 0.35.

[0051] By setting the above, the ratio of the distance between the lowest and highest points of the first surface 302 to the maximum width of the vertical preset straight line of the applicator head 3 is avoided from being too large, which would make the first surface 302 too rounded and improve the applicability of the applicator head 3.

[0052] By setting the above, the ratio of the distance between the lowest and highest points of the first surface 302 to the maximum width of the vertical preset straight line of the applicator head 3 is avoided to be too small, thereby improving the applicator head 3's applicability.

[0053] As one approach, the applicator 3 can be made of an elastomer, such as biomimetic silicone, to simulate the feel of a human fingertip and enhance the applicator experience.

[0054] As one implementation, the opening of the flow channel 201 facing the base 1 is misaligned with the axis of the rotating tube 2, so that during the rotation of the rotating tube 2, the opening of the flow channel 201 facing the base 1 rotates, forming a circular trajectory.

[0055] The center of the liquid inlet hole 101 is located within the aforementioned trajectory ring, so that during the rotation of the rotating tube 2, the openings of the liquid inlet hole 101 and the flow channel 201 facing the base 1 are at least partially connected, so that the liquid can flow through the liquid inlet hole 101 and the flow channel 201 to the surface of the applicator head 3.

[0056] It should be noted that the axis of the flow channel 201 can be inclined or parallel to the axis of the rotating tube 2, as long as the liquid inlet hole 101 and the flow channel 201 can be at least partially connected during the rotation of the rotating tube 2.

[0057] like Figure 3 and Figure 4As shown, as another implementation, the end of the sidewall of the rotating tube 2 facing the base 1 is formed with a flow channel hole 202, which is connected to the flow channel 201 so that liquid can flow into the flow channel 201 through the flow channel hole 202.

[0058] When the applicator is in the applicator state, the liquid inlet 101 is connected to the flow channel 201 through the flow channel hole 202 so that the liquid can flow into the flow channel 201.

[0059] When the applicator is in the closed state, the flow channel hole 202 is misaligned with the liquid inlet hole 101, and the side wall of the rotating tube 2 abuts against the liquid inlet hole 101.

[0060] It should be noted that the flow channel hole 202 can be an opening at one end of the flow channel 201 facing the base 1, or it can be a through hole formed separately on the side wall of the rotating tube 2. When the flow channel hole 202 is a through hole formed separately on the side wall of the rotating tube 2, the axis of the flow channel hole 202 and the axis of the flow channel 201 are located on the same plane and intersect each other. This application describes the flow channel hole 202 as being formed on the side wall of the rotating tube 2.

[0061] like Figure 2 and Figure 6 As shown, in one implementation, the base 1 also includes a mounting cavity 102, which extends in a direction away from the applicator head 3. The rotating tube 2 extends at least partially into the mounting cavity 102, and the rotating tube 2 has a rotational degree of freedom to rotate relative to the mounting cavity 102, that is, the rotating tube 2 can rotate relative to the mounting cavity 102.

[0062] In this implementation, the rotating tube 2 is installed on the base 1 through the mounting cavity 102, which improves the ease of installation of the rotating tube 2.

[0063] Specifically, an extension 104 is formed on the base 1, the extension 104 extends in a direction away from the applicator head 3, and the extension 104 extends at least partially into the container. A liquid inlet 101 is formed in the extension 104 so that liquid flows into the mounting cavity 102 through the liquid on the extension 104.

[0064] Meanwhile, the flow channel 201 extends at least partially into the mounting cavity 102, thereby facilitating the flow of liquid from the mounting cavity 102 into the flow channel 201.

[0065] As one implementation, the flow channel hole 202 is formed on the side wall of the rotating tube 2, so that during the rotation of the rotating tube 2 relative to the base 1, the flow channel hole 202 is at least partially connected to the liquid inlet hole 101 located on the extension 104, thereby facilitating the direct flow of liquid into the flow channel 201 through the liquid inlet hole 101 and the flow channel hole 202, reducing the amount of liquid flowing out of the container during a single use, and further preventing leakage of the application device when it is in the closed state.

[0066] like Figure 2 As shown, in one implementation, the flow channel 201 includes a first flow channel section 2011 and a second flow channel section 2012 through which liquid flows sequentially. The inner diameter of the first flow channel section 2011 is larger than the inner diameter of the second flow channel section 2012, and the second flow channel section 2012 is connected to the liquid outlet hole 301, and the flow channel hole 202 is connected to the first flow channel section 2011.

[0067] By reducing the inner diameter of the second flow channel section 2012 connected to the liquid outlet 301, the amount of liquid flowing through the flow channel 201 to the applicator head 3 is reduced, thereby improving the uniformity of liquid application by the applicator head 3. The setting of the first flow channel section 2011 ensures that enough liquid can flow into the flow channel 201, ensuring that the flow channel 201 can continuously supply liquid to the applicator head 3.

[0068] It should be noted that the flow channel 201 includes at least two flow channel segments with different inner diameters. This application does not limit the number of flow channel segments with different inner diameters in the flow channel 201.

[0069] like Figure 4 and Figure 6 As shown, as one implementation method, in order to facilitate the alignment of the flow channel hole 202 and the liquid inlet hole 101, a rotation limiting structure is provided between the base 1 and the rotating tube 2. By setting the rotation limiting structure, when the rotating tube 2 rotates relative to the base 1 to a certain extreme position, the flow channel hole 202 and the liquid inlet hole 101 are aligned.

[0070] As one implementation, the rotation limiting structure includes a limiting block 203 and a rotation limiting groove 1021. The limiting block 203 is formed on the circumferential side wall of the rotating tube 2, and the rotation limiting groove 1021 is formed on the circumferential inner wall of the mounting cavity 102. After the base 1 and the rotating tube 2 are assembled, the limiting block 203 is installed in the rotation limiting groove 1021.

[0071] Along the rotation direction of the rotating tube 2, the width of the limiting block 203 is smaller than the width of the rotating limiting groove 1021, so that the limiting block 203 can move relative to the rotating limiting groove 1021, so that the applicator can switch between the applicator state and the off state.

[0072] As one implementation, the rotating limiting groove 1021 includes at least one limiting surface 10211. When one side wall of the limiting block 203 abuts against the limiting surface 10211, the liquid inlet 101 communicates with the flow channel 201. The limiting surface 10211 limits the rotation limit position of the limiting block 203, thereby ensuring that when the limiting block 203 rotates to the limit position, the liquid inlet 101 communicates with the flow channel 201, so that the liquid can be delivered to the applicator head 3.

[0073] It should be noted that the limiting surface 10211 in this application includes two limiting surfaces 10211, which are located on both sides of the rotating limiting groove 1021 along the rotation direction of the rotating tube 2. When one side wall of the limiting block 203 abuts against the limiting surface 10211 on one side, the liquid inlet 101 communicates with the flow channel 201. When the other side wall of the limiting block 203 abuts against the limiting surface 10211 on the other side, the liquid inlet 101 is misaligned with the flow channel 201, thereby closing the flow channel 201.

[0074] like Figure 1 and Figure 7 As shown, in one implementation, the applicator includes a housing 4, which is mounted on the base 1. The rotating tube 2 is fixedly mounted on the base 1 by the housing 4, and the housing 4 has a rotational degree of freedom to rotate relative to the base 1.

[0075] The outer shell 4 is connected to the rotating tube 2, so that the rotating tube 2 and the outer shell 4 rotate simultaneously. The rotating tube 2 is rotated by the outer shell 4, which prevents the user from contacting the rotating tube 2 and prevents the rotating tube 2 from being contaminated. At the same time, it can prevent foreign objects from entering between the base 1 and the rotating tube 2, ensuring that the rotating tube 2 can rotate stably relative to the base 1. It can also prevent foreign objects from contaminating the cosmetic liquid.

[0076] It should be noted that in some other embodiments, the application device may consist only of a base 1, a rotating tube 2, and an application head 3.

[0077] As one implementation, a connecting plate 204 is formed on the side wall of the rotating tube 2, and the connecting plate 204 extends radially along the rotating tube 2; a slot 403 is formed inside the outer casing 4, and the connecting plate 204 is inserted into the slot 403 so that the outer casing 4 is connected to the rotating tube 2.

[0078] Specifically, the slot 403 extends along the axial direction of the housing 4 so as to facilitate the assembly of the slot 403 with the connecting plate 204 during the installation of the housing 4, thereby facilitating the connection between the rotating tube 2 and the housing 4 and improving the assembly convenience of this coating device.

[0079] As one implementation, an annular support plate 207 is also formed on the circumferential sidewall of the rotating tube 2. The circumferential sidewall of the support plate 207 is clearance-fitted with the inner wall of the outer shell 4 to keep the rotating tube 2 and the outer shell 4 coaxial, further improving the assembly convenience of the rotating tube 2 and the outer shell 4. The connecting plate 204 is connected between adjacent support plates 207 to strengthen the strength of the support plate 207.

[0080] Furthermore, along the radial direction of the rotating tube 2, the length of the connecting plate 204 is greater than the length of the support plate 207, so as to facilitate connection with the outer casing 4 via the connecting plate 204.

[0081] Alternatively, a connecting block 206 is formed at the end of the connecting plate 204 away from the rotating tube 2, and the connecting block 206 is connected to the slot 403 to realize the connection between the rotating tube 2 and the outer shell 4.

[0082] like Figure 4 As shown, in one implementation, the end of the rotating tube 2 away from the base 1 has a connecting slope 205. The connecting slope 205 is also connected to the adjacent support plate 207 through a connecting plate 204. The applicator head 3 is installed on the connecting slope 205.

[0083] The connecting slope 205 is inclined relative to the axis of the rotating tube 2, and the inclination angle between the connecting slope 205 and the rotating tube 2 is 30° to 60°, preferably 45°, so that the user can have a better experience in holding and applying the liquid. By setting the connecting slope 205 at an inclination, the application head 3 is inclined relative to the axis of the base 1, so that the application head 3 can apply the liquid to the user's skin surface and improve the comfort of using this application device.

[0084] Correspondingly, as one implementation method, for the teardrop-shaped applicator head 3, the highest point of the first surface 302 can be corresponding to the tip of the teardrop shape, and the lowest point of the first surface 302 can be corresponding to the vertex of the other wide side of the teardrop shape. The tilted setting makes it easier for the user to hold and use only the tip to contact the skin or lips to process details.

[0085] like Figure 6 and Figure 7 As shown, in one implementation, an annular groove 103 is formed on the outer circumferential wall of the base 1 facing the outer shell 4; a limiting ring 401 is formed on the inner circumferential wall of the outer shell 4 facing the base 1. After the base 1 and the outer shell 4 are assembled, the limiting ring 401 is installed in the annular groove 103. The outer shell 4 is installed on the base 1 by the cooperation of the limiting ring 401 and the annular groove 103, and the outer shell 4 and the base 1 can rotate relative to each other by the cooperation of the limiting ring 401 and the annular groove 103.

[0086] As one implementation, the end of the outer shell 4 facing away from the base 1 has an opening 402, and at least part of the applicator head 3 extends out of the outer shell 4 through the opening 402 to facilitate the application of the applicator head 3 to the user's skin surface.

[0087] Along the direction of the plane where the vertical opening 402 is located, the projection of the opening 402 is located within the projection of the applicator head 3. The applicator head 3 deforms during use to ensure that the applicator head 3 can at least partially abut against the plane where the opening 402 is located, thereby preventing the squeezed cosmetic liquid from penetrating into the outer shell 4 through the opening 402.

[0088] like Figure 2 , Figure 3 and Figure 4As shown, in one implementation, the applicator also includes a connecting pad 5, which is located between the applicator head 3 and the rotating tube 2, and is sealed to the opening 402. The connecting pad 5 seals the connection between the applicator head 3 and the opening 402, thereby improving the sealing performance of the applicator.

[0089] Furthermore, the end face of the outer shell 4 facing away from the base 1 is arranged parallel to the connecting slope 205, so that the upper and lower ends of the connecting pad 5 can abut against the rotating tube 2 and the outer shell 4 respectively, further improving the sealing performance of this coating device.

[0090] As one implementation, a liquid passage hole 501 is formed on the connecting pad 5, and the liquid passage hole 501 is connected to the flow channel 201 and the liquid outlet hole 301 respectively.

[0091] Specifically, the inner diameter of the liquid passage 501 is less than or equal to the inner diameter of the second flow channel section 2012, further controlling the amount of liquid flowing to the surface of the applicator head 3.

[0092] As one implementation, along the direction perpendicular to the first surface 302, the cross-sectional area of ​​the applicator 3 parallel to the first surface 302 decreases from the side facing the rotating tube 2 toward the first surface 302.

[0093] As shown in the figure, in another implementation method, along the direction perpendicular to the first surface 302, the cross-sectional area of ​​the applicator 3 parallel to the first surface 302 first increases and then decreases from the side facing the rotating tube 2 toward the first surface 302.

[0094] Specifically, along the direction perpendicular to the first surface 302, the sidewall of the applicator 3 is arc-shaped, which allows the applicator 3 to simulate the shape of a fingertip, making the touch of the applicator 3 similar to that of a fingertip, thus improving the comfort of using the applicator 3. On the other hand, when the applicator 3 is applying the coating, it will be subjected to a certain amount of pressure and deform towards the rotating tube 2, so that part of the sidewall of the applicator 3 abuts against the end face of the outer shell 4 facing the applicator 3, thereby preventing material accumulation between the applicator 3 and the outer shell 4, and thus improving the cleanliness of the applicator.

[0095] The above description is merely an embodiment of this application and is not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

[0096] Although embodiments of this application have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of this application, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. An applicator characterized by, include: The base (1) includes an inlet hole (101) for liquid to flow through the base (1). A rotating tube (2) is mounted on the base (1) and has a rotational degree of freedom to rotate relative to the base (1). The rotating tube (2) has a flow channel (201) for liquid to flow through. The applicator (3) is installed at the end of the rotating tube (2) away from the base (1). The applicator (3) has a liquid outlet hole (301) inside, which is connected to the flow channel (201). The rotating tube (2) rotates relative to the base (1), so that the applicator includes an applicator state in which the liquid inlet (101) communicates with the flow channel (201) and a closed state in which the flow channel (201) is misaligned with the liquid inlet (101); Furthermore, the applicator (3) includes a first surface (302) facing away from the base (1), defining a preset straight line (10), the preset straight line (10) passing through the lowest point and the highest point of the first surface (302), along a direction parallel to the first surface (302) and perpendicular to the preset straight line (10), the width of the applicator (3) increases from the lowest point of the first surface (302) to the highest point of the first surface and then decreases.

2. A device as claimed in claim 1, wherein Along the preset straight line (10), the first surface (302) includes a first arc-shaped portion (3021) and a second arc-shaped portion (3022), the radius of the first arc-shaped portion (3021) is smaller than the radius of the second arc-shaped portion (3022).

3. A device as claimed in claim 1, wherein The first surface (302) is symmetrical about the preset straight line (10).

4. The applicator of claim 1, wherein The rotating tube (2) has a flow channel hole (202) formed on its side wall, and the flow channel hole (202) is connected to the flow channel (201); When the applicator is in the applicator state, the liquid inlet (101) is connected to the flow channel (201) through the flow channel hole (202); When the applicator is in the closed state, the flow channel hole (202) is misaligned with the liquid inlet hole (101), and the side wall of the rotating tube (2) abuts against the liquid inlet hole (101).

5. The applicator of claim 1, wherein The flow channel (201) includes a first flow channel section (2011) and a second flow channel section (2012) through which liquid flows sequentially. The inner diameter of the first flow channel section (2011) is larger than the inner diameter of the second flow channel section (2012), and the second flow channel section (2012) is connected to the liquid outlet (301).

6. The applicator of claim 1, wherein The base (1) further includes a mounting cavity (102) extending in a direction away from the applicator head (3), and a rotation limiting groove (1021) is formed in the mounting cavity (102). A limiting block (203) is formed on the rotating tube (2), and the limiting block (203) is installed in the rotating limiting groove (1021).

7. A device as claimed in claim 6, wherein The rotating limiting groove (1021) includes at least one limiting surface (10211); When one side wall of the limiting block (203) abuts against the limiting surface (10211), the liquid inlet (101) communicates with the flow channel (201).

8. The applicator of claim 1, wherein The applicator includes a housing (4), which is mounted on the base (1) and has a rotational degree of freedom to rotate relative to the base (1); The outer casing (4) is connected to the rotating tube (2) so as to rotate the rotating tube (2) through the outer casing (4).

9. A device as claimed in claim 8, wherein A connecting plate (204) is formed on the side wall of the rotating tube (2), and the connecting plate (204) extends radially along the rotating tube (2); A slot (403) is formed inside the outer casing (4), and the connecting plate (204) is inserted into the slot (403) so that the outer casing (4) is connected to the rotating tube (2).

10. A device as claimed in claim 8, wherein An annular groove (103) is formed on the base (1); A limiting ring (401) is formed inside the outer shell (4), and the limiting ring (401) is installed in the ring groove (103) so that the outer shell (4) can be rotatably installed on the base (1).

11. A device as claimed in claim 8, wherein, An opening (402) is formed at the end of the outer shell (4) away from the base (1), and the applicator head (3) extends out of the outer shell (4) through the opening (402); Along the direction perpendicular to the plane where the opening (402) is located, the projection of the opening (402) is located within the projection of the applicator head (3).

12. A device as claimed in claim 11, wherein The applicator also includes a connecting pad (5), which is located between the applicator head (3) and the rotating tube (2), and the connecting pad (5) is sealed to the opening (402); a liquid passage hole (501) is formed on the connecting pad (5), and the liquid passage hole (501) is connected to the flow channel (201) and the liquid outlet hole (301) respectively.

13. The applicator of claim 1, wherein The rotating tube (2) has a connecting slope (205) formed at one end away from the base (1), and the connecting slope (205) is inclined relative to the axis of the rotating tube (2); The applicator (3) is installed on the connecting slope (205).

14. The applicator of claim 1, wherein Along the direction perpendicular to the first surface (302), the cross-sectional area of ​​the applicator (3) parallel to the first surface (302) first increases and then decreases from the side facing the rotating tube (2) toward the first surface (302).

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