Handheld optical device

Abstract

The utility model provides hand -held optical equipment, include: casing, the casing includes first casing part and the second casing part of being connected in first casing part, the end face of first casing part is equipped with air outlet, the circumference of first casing part is equipped with air inlet, the drainage groove is formed by the edge portion of first casing part and second casing part is radially spaced or is spaced along the circumference, wherein, the drainage groove communicates with air inlet, and from air inlet place extends to the end of first casing part, the drainage groove has the same fluid inlet with its extension direction, to allow fluid from fluid inlet enters air inlet.

Description

Technical Field

[0001] This utility model relates to the field of optical technology, and in particular to a handheld optical device. Background Technology

[0002] Handheld optical devices, such as beauty devices and hair removal devices, have a light source component inside their casing. During operation, this component generates considerable heat. Current technology often incorporates vents in the casing to allow airflow exchange between the internal and external environments, carrying away the heat. However, improper hand grip during use can partially or completely block these vents. This blockage directly impacts the efficiency of airflow exchange, leading to abnormal internal temperatures and reduced heat dissipation. Utility Model Content

[0003] The purpose of this invention is to provide a handheld optical device whose air inlet is not easily blocked.

[0004] The purpose of this utility model is to provide a handheld optical device, comprising: The housing includes a first housing portion and a second housing portion connected to the first housing portion. The end face of the first housing portion is provided with an air outlet, and the circumferential surface of the first housing portion is provided with an air inlet. A drainage channel is formed by radially or circumferentially spaced edges of the first housing portion and the second housing portion. The drainage channel is connected to the air inlet and extends from the air inlet to the end of the first housing portion. The drainage channel has a fluid inlet in the same direction as its extension to allow fluid to enter the air inlet from the fluid inlet.

[0005] As a further improvement of one embodiment of the present invention, the housing is columnar and has a front end with a light outlet. Along the length of the first housing portion, the air inlet is located in the two-thirds region of the first housing portion near the front end.

[0006] As a further improvement of one embodiment of the present invention, the second housing portion includes a first portion covering the air inlet, wherein an interval space is left between the inner surface of the first portion and the outer surface of the first housing portion, and the drainage groove communicates with the interval space.

[0007] As a further improvement of one embodiment of the present invention, the second housing portion covers the main body portion on the outer surface of the first housing portion, and has a flange that folds from the edge of the main body portion toward the first housing portion, the edge of the flange abutting against the outer surface of the first housing portion, and the extending direction of the flange is the same as the extending direction of the main body portion.

[0008] As a further improvement of one embodiment of the present invention, the outer surface of the first housing portion is at least partially recessed to form a concave portion, the extending direction of the concave portion is the same as the extending direction of the main body portion, the flange is at least partially located within the concave portion, and the flange and the wall of the concave portion together define the drainage groove.

[0009] As a further improvement of one embodiment of the present invention, the first shell portion and the second shell portion are integrally formed.

[0010] As a further improvement of one embodiment of the present invention, the first housing portion and the second housing portion are detachably connected.

[0011] As a further improvement of one embodiment of the present invention, the second housing portion includes a first portion covering the air inlet and a second portion connected to the first portion, wherein the width of the first portion is greater than the width of the second portion.

[0012] As a further improvement of one embodiment of the present invention, the first part is constructed as a non-hollow structure.

[0013] As a further improvement of one embodiment of the present invention, the width of the drainage groove corresponding to the first part is greater than the width of the drainage groove corresponding to the second part.

[0014] As a further improvement of one embodiment of this utility model, the drainage groove is axially symmetrical.

[0015] As a further improvement of one embodiment of the present invention, the drainage channel includes a first drainage channel extending along the length direction, the first drainage channel includes two symmetrically arranged, and the drainage channel further includes a second drainage channel connecting the first drainage channel.

[0016] As a further improvement of one embodiment of this utility model, the optical device is one of a hair removal device, a skin rejuvenation device, an ultrasonic device, or a radio frequency device.

[0017] Compared with the prior art, the beneficial effect of this utility model is that it is provided with a drainage groove facing the end of the housing, and the drainage groove is connected to the air inlet, which increases the path of gas in the external environment into the cavity. Even if the user holds it in an unexpected position and blocks the air inlet area, the external gas can still enter the cavity to achieve heat dissipation. Attached Figure Description

[0018] Figure 1 This is a three-dimensional schematic diagram of the handheld optical device according to the first embodiment of this utility model; Figure 2 yes Figure 1 A cross-sectional schematic diagram of the handheld optical device shown; Figure 3 yes Figure 1 Another cross-sectional schematic diagram of the handheld optical device shown; Figure 4 yes Figure 1 A schematic diagram of a second housing portion of the handheld optical device shown; Figure 5 yes Figure 1 A schematic diagram of another second housing portion of the handheld optical device shown; Figure 6 This is a cross-sectional schematic diagram of a handheld optical device according to another embodiment of the present invention; Figure 7 This is a cross-sectional schematic diagram of a handheld optical device according to another embodiment of the present invention; Figure 8 This is a cross-sectional schematic diagram of the handheld optical device according to the second embodiment of this utility model; Figure 9 This is a cross-sectional schematic diagram of a handheld optical device according to another embodiment of the present invention; Figure 10 This is a cross-sectional schematic diagram of a handheld optical device according to the third embodiment of this utility model. Detailed Implementation

[0019] The present invention will now be described in detail with reference to the specific embodiments shown in the accompanying drawings. However, these embodiments do not limit the present invention, and any structural, methodological, or functional modifications made by those skilled in the art based on these embodiments are included within the protection scope of the present invention.

[0020] It should be understood that terms such as “above,” “over,” “below,” and “under” used herein to indicate spatial relative position are for illustrative purposes to describe the relationship of one unit or feature relative to another unit or feature as shown in the accompanying drawings. The terms “spatial relative position” may be intended to include different orientations of the equipment in use or operation other than those shown in the figures.

[0021] This application provides a handheld optical device.

[0022] See Figures 1 to 3 The handheld optical device includes a housing. A light source assembly 12 may be housed within the housing. The housing may have a light outlet 11, and a light-transmitting crystal (e.g., sapphire) may be installed at the light outlet 11 to allow light to pass through the light source assembly 12 and to deliver a cooling medium to the skin via the light-transmitting crystal. When the handheld optical device is in operation, the light source assembly 12 is activated, and the light emitted by the light source assembly 12 is emitted through the light-transmitting crystal at the light outlet 11.

[0023] In the embodiments provided in this application, the handheld optical device can be one of a hair removal device, a skin rejuvenation device, an ultrasonic device, or a radio frequency device. Different functions can be achieved by setting parameters such as the wavelength and emission time of the light source component 12.

[0024] In the specific embodiments provided in this application, the handheld optical device is a hair removal device. The light source assembly 12 includes a xenon lamp. The xenon lamp emits light of a specific wavelength that can penetrate skin tissue to achieve hair removal. Since the xenon lamp requires high-voltage excitation to release high energy instantaneously, a large amount of heat accumulates inside the device and is transferred to the user's skin through heat conduction. Therefore, the hair removal device often also incorporates a semiconductor cooling chip to work with a light-transmitting crystal. The light-transmitting crystal allows the xenon lamp light to pass through while also transferring the refrigerant from the semiconductor cooling chip. During use, the surface of the light-transmitting crystal can directly contact the skin, achieving skin cooling and reducing the burning sensation caused by high-temperature transfer. The semiconductor cooling chip has a cold end and a hot end. The cold end contacts the light-transmitting crystal, generating heat at its hot end, which further increases the temperature inside the cavity S. The temperature inside the cavity S becomes excessively high due to the combined heat from the xenon lamp and the hot end, among other heat-generating components. Once a certain threshold temperature is exceeded, the device may malfunction, stop operating, or the components may be damaged. Therefore, such handheld optical devices require a good heat dissipation system to cool the inside of the cavity S.

[0025] In this embodiment, a cavity S may be formed inside the housing. The light source assembly 12 may be installed inside the cavity S.

[0026] The housing is also provided with a vent 14. The vent 14 connects the cavity S inside the housing with the external environment.

[0027] In the specific embodiments provided in this application, the vent 14 is an air inlet. Hereinafter, vent 14 will be used to refer to the air inlet. Of course, in other embodiments, the vent 14 may also be configured as an air outlet.

[0028] A heat dissipation element 13 may also be installed inside the housing. The heat dissipation element 13 may include heat dissipation fins, a heat dissipation fan, and other components.

[0029] Gas from the external environment can enter the cavity S through the vent 14 and then exit from the cavity S into the external environment through the outlet 141. During the gas flow, heat inside the cavity S can be carried away, preventing abnormal temperature inside the cavity S.

[0030] The housing has a circumferential surface 15. The circumferential surface 15 may be a surface formed around the length direction L of the housing. Along the length direction L of the housing, the housing also includes an end face 16. A vent 14 may be disposed on the circumferential surface 15.

[0031] In one embodiment of this application, the shell is columnar. Specifically, the shell can be cylindrical, prismatic, or irregularly columnar. Here, "columnar" means that the shell extends substantially in a single direction. The shell does not have two distinctly angled sections. The direction of extension of the shell is its length direction L.

[0032] In this embodiment, the vent 14 is opened on the circumferential surface 15 of the housing, and the vent 141 is opened on the end face 16 of the housing.

[0033] In this embodiment, the housing may include a first housing portion 1. A cavity S may be formed within the first housing portion 1.

[0034] The housing may also include a second housing portion 2. The second housing portion 2 is connected to the first housing portion 1.

[0035] In this embodiment, the first housing portion 1 has a circumferential surface 15. An air inlet (i.e., a vent 14) is formed on the circumferential surface 15 of the first housing portion 1. The first housing portion 1 also has an end face 16. An air outlet 141 is formed on the end face 16 of the first housing portion 1.

[0036] The housing may also have a drainage groove 23. The drainage groove 23 can communicate with the vent 14. The drainage groove 23 extends from the vent 14 toward the end of the housing.

[0037] In the specific embodiment provided in this application, the drainage channel 23 is in communication with the air inlet and extends from the air inlet toward the end of the first housing portion 1. The drainage channel 23 has a fluid inlet 24 in the same direction as its extension to allow fluid to enter the air inlet from the fluid inlet 24.

[0038] In this embodiment, the end of the housing is the end of the first housing portion 1. Gas from the external environment can enter the drainage channel 23 through the fluid inlet 24, enter the air inlet through the drainage channel 23, and then enter the interior of the housing.

[0039] The fluid inlet 24 extends in the same direction as the flow channel 23, both extending from the air inlet to the end of the first housing part 1.

[0040] In this embodiment, the drainage channel 23 is formed by the edges of the first housing portion 1 and the second housing portion 2 spaced apart radially by R or circumferentially by C.

[0041] The second housing portion 2 is connected to the circumferential surface 15 of the first housing portion 1, and the second housing portion 2 covers a portion of the circumferential surface 15 of the first housing portion 1.

[0042] Wherein, the circumferential direction C of the first housing part 1 is the direction surrounding the length direction L of the first housing part 1. The radial direction R of the first housing part 1 is perpendicular to the length direction L of the first housing part 1.

[0043] See Figures 1 to 3 This is a handheld optical device according to the first embodiment of this application. In this embodiment, the outer surface of the first housing portion 1 and the edge portion of the second housing portion 2 are spaced apart along the circumferential direction C to form a drainage groove 23.

[0044] See Figure 8 The handheld optical device provided in the second embodiment of this application has a drainage groove 23 formed by the outer surface of the first housing portion 1 and the edge portion of the second housing portion 2 being arranged radially R apart.

[0045] When using the handheld optical device, the user needs to hold the housing. Gas from the external environment can enter the drainage channel 23 through the fluid inlet 24 and then into the interior of the housing. Since the fluid inlet 24 extends to the end, it will not be completely blocked when the user holds the device. Therefore, regardless of where the user holds the handheld optical device, the airflow between the external environment and the interior of the housing will not be affected, thus avoiding abnormal increases in internal temperature due to the inability to allow gas to enter.

[0046] The handheld optical device of the first embodiment provided in this application will be described in detail below.

[0047] See Figures 1 to 3 In this embodiment, along the length direction L of the first housing portion 1, the vent 14 is disposed in the area of ​​the first housing portion 1 near the front end in two-thirds of the region.

[0048] In this embodiment, the front end of the first housing part 1 is the end with the light outlet 11, and the opposite end is the rear end.

[0049] The first housing portion 1, near the front end, is located in the two-thirds region, which can be understood as the region measured along the length direction L from the front end to two-thirds of the length.

[0050] The handheld optical device also includes a button 3, which is used to control the operation of the handheld optical device. Button 3 is located in the middle of the housing, specifically in the middle third area. When using the handheld optical device, the user typically holds it in the lower middle part, near the rear. At this time, the user's thumb can directly contact and control button 3, which conforms to ergonomic design. Therefore, placing the vent 14 in the area near the front two-thirds ensures that when the user holds the handheld optical device normally, their hand is usually downstream of the vent 14, making it less likely to obstruct the vent 14 and thus achieving better heat dissipation.

[0051] In this embodiment, the drainage channel 23 and the fluid inlet 24 extend from one end of the first housing portion 1 to the other end, or from the middle of the first housing portion 1 to the other end. The length of the drainage channel 23 and the fluid inlet 24 is at least one-third of the length of the first housing portion 1.

[0052] Preferably, the length of the drainage channel 23 and the fluid inlet 24 is greater than half the length of the first housing portion 1. This avoids the possibility that the user's hand may completely block the fluid inlet 24 when holding the handheld optical device.

[0053] It is understandable that the length of the drainage channel 23 and the fluid inlet 24 can be as long as possible. The longer the length of the drainage channel 23 and the fluid inlet 24, the less likely they are to be completely blocked, and the higher the heat dissipation stability.

[0054] Furthermore, in one embodiment of this application, the second housing portion 2 covers at least a portion of the vent 14.

[0055] In this embodiment, the second housing portion 2 includes a first portion 21. The first portion 21 covers the vent 14.

[0056] The first portion 21 may cover at least half of the vent 14. Preferably, the first portion 21 covers the entire vent 14.

[0057] A gap space 18 is left between the inner surface of the first part 21 and the outer surface of the first housing part 1. The drainage channel 23 is connected to the gap space 18.

[0058] When the vent 14 is the air inlet, the gas from the external environment can enter the flow channel 23 from the fluid inlet 24, then enter the space 18, and finally enter the interior of the housing through the vent 14.

[0059] In this embodiment, the first part 21 can also be constructed as a non-perforated structure, that is, the first part 21 does not have through holes. The edge of the first part 21 is spaced apart from the first housing part 1 radially R or circumferentially C, forming a portion of the drainage groove 23. Gas from the external environment can enter the cavity S simply through the fluid inlet 24 and the drainage groove 23.

[0060] Of course, in other possible embodiments, the first part 21 of the second housing part 2 may have a through hole, which connects to the external environment and the partition space 18. In this embodiment, gas from the external environment can enter the partition space 18 through the through hole, and then enter the cavity S through the vent 14. At the same time, gas from the external environment can also enter the partition space 18 through the fluid inlet 24 and the drainage channel 23, and then enter the cavity S through the vent 14. In this way, the gas flow rate can be increased, ensuring heat dissipation efficiency.

[0061] In one embodiment of this application, the total area of ​​the vent 14 covered by the second housing portion 2 is S1, and the area of ​​the fluid inlet 24 of the drainage groove 23 is S2. S1 and S2 are essentially the same, thus ensuring that the second housing portion 2 covers the vent 14 to improve visual integrity and enhance the user experience. Simultaneously, fluid with a designed flow rate can enter the partition space 18 from the fluid inlet 24 to ensure heat dissipation.

[0062] In one embodiment of this application, along the circumferential direction C of the housing, the distance between the edge of the second housing portion 2 and the first housing portion 1 is greater than or equal to 1 mm. This avoids the drainage groove 23 having an excessively small width gap, which could affect the airflow rate.

[0063] Along the radial direction R of the housing, the distance between the inner surface of the second housing portion 2 and the outer surface of the first housing portion 1 is greater than or equal to 1 mm. That is, the height of the space 18 is greater than or equal to 1 mm. In this way, the size of the space 18 can be guaranteed, thereby ensuring the gas flow rate and heat dissipation efficiency.

[0064] Further, see Figure 4 In one embodiment of this application, the second housing portion 2 includes a main body portion 25 that covers the outer surface of the first housing portion 1. The second housing portion 2 also includes a flange 26 that folds from the edge of the main body portion 25 toward the first housing portion 1.

[0065] In this embodiment, the edge of the flange 26 abuts against the outer surface of the first housing portion 1. The extending direction of the flange 26 is the same as the extending direction of the main body portion 25.

[0066] The edge of the flange 26 abuts against the outer surface of the first housing part 1, which can provide support for the second housing part 2, so that the second housing part 2 can be stably connected to the first housing part 1.

[0067] In one embodiment, the edge of the flange 26 forms the edge of the second housing portion 2. The flange 26 of the first portion 21 does not abut against the first housing portion 1, that is, a gap is left between the edge of the flange 26 and the outer surface of the first housing portion 1 to form a communication port 261, so as to allow gas in the drainage channel 23 to enter the spacer space 18 through the communication port 261.

[0068] There can be only one port 261. See also Figure 5 The connection port 261 can also be set to multiple intervals.

[0069] Of course, the first part 21 may only include the main body 25, without the flange 26. The edge of the main body 25 forms the edge of the first part 21. Therefore, a gap is left between the edge of the main body 25 of the first part 21 and the outer surface of the first housing part 1 to allow external airflow to pass through and enter the space 18.

[0070] Further details can be found by referring to [link / reference]. Figure 3 In one embodiment of this application, the outer surface of the first housing portion 1 is at least partially recessed to form a recessed portion 17.

[0071] In this embodiment, the region in the first housing portion 1 where the recess 17 is formed is the first region 151, and the other regions are the second region 152. The outer surface of the first region 151 is recessed relative to the outer surface of the first region 151. A vent 14 may be provided in the recess 17. At least a portion of the second housing portion 2 is placed within the recess 17 and covers the vent 14.

[0072] The edge of the second housing portion 2 may be located within the area formed by the recess 17.

[0073] The recess 17 extends in the same direction as the main body 25. The flange 26 is at least partially located within the recess 17.

[0074] In this embodiment, the recess 17 is used to accommodate the second housing portion 2. The shape of the recess 17 may be substantially the same as the shape of the second housing portion 2. The recess 17 may have a bottom wall 172 and a side wall 171. The bottom wall 172 is opposite to the main body portion 25, and a gap 18 is formed between them. The flange 26 of the second housing portion 2 is located inside the recess 17, and the flange 26 is opposite to the side wall 171 of the recess 17, with a gap between the flange 26 and the side wall 171 of the recess 17. At this time, the flange 26, the side wall 171 of the recess 17, and the bottom wall 172 together define a drainage groove 23. The drainage groove 23 is open on the side opposite to the bottom wall 172, forming a fluid inlet 24.

[0075] In this embodiment, the outer surface of the second housing portion 2 is flush with the outer surface of the second region 152. This creates a unified housing appearance and improves the user's grip. Both the second housing portion 2 and the sidewalls 171 of the recess 17 can cover the vent 14 to ensure visual uniformity, thereby enhancing the user experience.

[0076] This application also provides other alternative implementation methods. For example... Figure 6 As shown, in this embodiment, the outer surface of the second housing portion 2 is concave relative to the outer surface of the second region 152, so that the vent 14 can be blocked, improving the user experience.

[0077] Of course, in other embodiments, the outer surface of the second housing portion 2 may also protrude relative to the outer surface of the second region 152.

[0078] In this embodiment, the first housing part 1 and the second housing part 2 can also be detachably connected. Designing the first housing part 1 and the second housing part 2 to be detachably connected facilitates the user's cleaning of the vent 14 or the partition space 18 or other operable actions.

[0079] The first housing part 1 may have a slot 19, and the inner surface of the second housing part 2 may be provided with a claw 27 that mates with the slot 19. The connection between the first housing part 1 and the second housing part 2 can be achieved through the engagement of the slot 19 and the claw 27.

[0080] Of course, in other embodiments, the first housing portion 1 and the second housing portion 2 are integrally formed. For example, the flange 26 and the side wall 171 portion of the recess 17 can be integrally formed.

[0081] Further details can be found by referring to [link / reference]. Figures 1 to 5 In one embodiment of this application, the second housing portion 2 further includes a second portion 22, which is connected to the first portion 21. The width of the first portion 21 is greater than the width of the second portion 22.

[0082] In this embodiment, the second part 22 does not cover the vent 14. The width of the first part 21 that covers the vent 14 is set to be relatively wide, and its edge is constructed as an arc-shaped outward profile, which can effectively increase the ventilation area, ensure the airflow speed under normal grip, and achieve better heat dissipation.

[0083] Furthermore, in one embodiment of this application, the width of the drainage groove 23 corresponding to the first part 21 is greater than the width of the drainage groove 23 corresponding to the second part 22.

[0084] In this embodiment, the width of the drainage groove 23 corresponding to the center of the first part 21 is the widest, and it gradually narrows to a certain width at both ends before extending to the end of the shell with that width.

[0085] Since the user's hand will not be gripping the first part 21 under normal holding conditions, the width of the corresponding airflow groove 23 at the first part 21 is set to be relatively wide, which facilitates the rapid entry of airflow into the interval space 18 and into the cavity S. This ensures high heat dissipation efficiency.

[0086] Furthermore, in one embodiment of this application, the drainage channel 23 is axially symmetrical.

[0087] It is understood that this embodiment includes at least two flow channels 23. Along the circumferential direction C, the two side edges of the second housing portion 2 are spaced apart from the first housing portion 1, forming two flow channels 23. This further ensures the airflow entering the spacer space 18.

[0088] In this embodiment, along the length L of the housing, a second portion 22 extending toward the end of the housing is provided on both sides of the first portion 21. The second portions 22 on both sides of the first portion 21 can extend to the front end and rear end of the housing, respectively. Therefore, along the length L of the housing, a drainage groove 23 communicating with the vent 14 is provided on both sides of the vent 14. Specifically, the drainage groove 23 extends from one end of the housing to the other end.

[0089] Thus, a continuous drainage groove 23 is provided along the entire length L of the housing, so that external gas can enter the cavity S through the drainage groove 23 to dissipate heat inside the cavity S, no matter where the user holds it.

[0090] Furthermore, in one embodiment of this application, the heat dissipation element 13 includes a fluid drive member 131. The fluid drive member 131 has a fluid opening 132.

[0091] The fluid drive component 131 can be a fan. When the vent 14 is an air inlet, the fluid drive component 131 assists in drawing fluid from the external environment into the cavity S. At this time, the fluid opening 132 is an air inlet.

[0092] The fluid opening 132 is positioned close to the vent 14. This allows airflow to pass through quickly, increasing the airflow rate.

[0093] In this embodiment, the vent 14 is disposed opposite to the fluid opening 132. At least a portion of the vent 14 is disposed opposite to the fluid opening 132, allowing airflow to flow directly between the vent 14 and the fluid opening 132. The fluid drive 131 can better drive the gas to flow rapidly, resulting in good heat dissipation.

[0094] In this embodiment, the second housing portion 2 is configured in an arc shape. However, if... Figure 6 or Figure 7 In the embodiment shown, the second housing portion 2 can also be designed as a planar shape. The shape of the second housing portion 2 can be designed according to the shape of the first housing portion 1, so that the first housing portion 1 and the second housing portion 2 maintain a uniform appearance.

[0095] The handheld optical device of the second embodiment of this application will be described in detail below.

[0096] The main difference between the handheld optical device of the second embodiment and the handheld optical device of the first embodiment lies in the design of the housing.

[0097] See Figure 8 As mentioned above, in this embodiment, the drainage groove 23 is formed by the edges of the first housing portion 1 and the second housing portion 2 spaced apart radially by R.

[0098] In this embodiment, the first housing portion 1 may include a first region 151 and a second region 152. The outer surface of the first region 151 is recessed relative to the outer surface of the second region 152 to form a recessed portion 17.

[0099] The second housing portion 2 may cover the first region 151 and a portion of the second region 152. The outer edge of the second housing portion 2 may be placed within the second region 152. A drainage groove 23 is formed between the outer edge of the second housing portion 2 and the outer surface of the second region 152 at a radial interval R.

[0100] Of course, the outer surface of the first housing portion 1 can also be flush with the outer surface of the second region 152. That is, the first housing portion 1 does not have the recess 17. In this case, the second housing portion 2 directly covers the outer surface of the first housing portion 1, and a gap 18 is left between the inner surface of the second housing portion 2 and the outer surface of the first housing portion 1. At the same time, a gap 23 is left between the edge of the second housing portion 2 and the outer surface of the first housing portion 1. The height of the gap 18 can be the same as the width of the drainage groove 23.

[0101] Figure 8 In the embodiment shown, the second housing portion 2 is designed in an arc shape. Alternatively, Figure 9 In the embodiment shown, the second housing portion 2 is designed to be planar.

[0102] See Figure 10 This is a handheld optical device according to the third embodiment of this application. The difference between the handheld optical device of this embodiment and the handheld optical device of the first embodiment lies in the design of the drainage groove 23.

[0103] In this embodiment, the drainage channel 23 includes a first drainage channel 231 extending along the length direction L. The first drainage channel 231 includes two symmetrically arranged channels. The drainage channel 23 also includes a second drainage channel 232 connecting the first drainage channel 231.

[0104] In this embodiment, a second portion 22 is provided on the rear side of the first portion 21 along the length L of the housing. The second portion 22 extends from the first portion 21 toward the rear end of the housing. Neither the first portion 21 nor the second portion 22 extends completely to the end of the housing; therefore, the drainage groove 23 also does not extend completely to the end of the housing.

[0105] The second airflow channel 232 is located near the front end of the first housing portion 1 and the second housing portion 2. The extending direction of the second airflow channel 232 is different from that of the first airflow channel 231. Providing multiple interconnected airflow channels 23 can increase the airflow inflow and improve heat dissipation efficiency.

[0106] It should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0107] The detailed descriptions listed above are merely specific descriptions of feasible implementations of this utility model, and are not intended to limit the scope of protection of this utility model. All equivalent implementations or modifications made without departing from the spirit of this utility model should be included within the scope of protection of this utility model.

Claims

1. A handheld optical device, characterized in that, include: The housing includes a first housing portion and a second housing portion connected to the first housing portion. The end face of the first housing portion is provided with an air outlet, and the circumferential surface of the first housing portion is provided with an air inlet. A drainage channel is formed by radially or circumferentially spaced edges of the first housing portion and the second housing portion. The drainage channel is connected to the air inlet and extends from the air inlet to the end of the first housing portion. The drainage channel has a fluid inlet in the same direction as its extension to allow fluid to enter the air inlet from the fluid inlet.

2. The handheld optical device according to claim 1, characterized in that, The housing is columnar and has a front end with a light outlet. Along the length of the first housing portion, the air inlet is located in the area of ​​the first housing portion near the front end.

3. The handheld optical device according to claim 2, characterized in that, The second housing portion includes a first portion that covers the air inlet, with a gap between the inner surface of the first portion and the outer surface of the first housing portion, and the drainage groove communicating with the gap.

4. The handheld optical device according to claim 1, characterized in that, The second housing portion covers the main body portion on the outer surface of the first housing portion, and has a flange that folds from the edge of the main body portion toward the first housing portion. The edge of the flange abuts against the outer surface of the first housing portion, and the extension direction of the flange is the same as the extension direction of the main body portion.

5. The handheld optical device according to claim 4, characterized in that, The outer surface of the first housing portion is at least partially recessed to form a concave portion, the extending direction of the concave portion is the same as the extending direction of the main body portion, the flange is at least partially located within the concave portion, and the flange and the wall of the concave portion together define the drainage groove.

6. The handheld optical device according to claim 1, characterized in that, The first housing portion and the second housing portion are integrally formed.

7. The handheld optical device according to claim 1, characterized in that, The first housing portion and the second housing portion are detachably connected.

8. The handheld optical device according to claim 4, characterized in that, The second housing portion includes a first portion covering the air inlet and a second portion connected to the first portion, wherein the width of the first portion is greater than the width of the second portion.

9. The handheld optical device according to claim 8, characterized in that, The first part is constructed as a non-hollow structure.

10. The handheld optical device according to claim 8, characterized in that, The width of the drainage channel corresponding to the first part is greater than the width of the drainage channel corresponding to the second part.

11. The handheld optical device according to claim 10, characterized in that, The drainage channel is axially symmetrical.

12. The handheld optical device according to claim 11, characterized in that, The drainage channel includes a first drainage channel extending along the length direction, and the first drainage channel includes two symmetrically arranged channels. The drainage channel also includes a second drainage channel connected to the first drainage channel.

13. The handheld optical device according to any one of claims 1-12, characterized in that, The optical device is one of the following: a hair removal device, a skin rejuvenation device, an ultrasonic device, or a radio frequency device.

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