Anti-fog condensation device for vehicle-mounted lamp

Abstract

The fog condensation prevention device for the vehicle-mounted lamp comprises a main shell and a vent valve, one end of the main shell is provided with a concave clamping groove, and the groove bottom face of the clamping groove is provided with an inner air port and an outer air port; a groove is selectively formed in the bottom face of the clamping groove, the air inlet valve is of a basin-shaped structure, one face of the air inlet valve faces the bottom face of the clamping groove, and the other face of the air inlet valve faces the outer side. A vent hole is formed in one end of the air inlet valve, the air inlet valve can be installed in the clamping groove, and the vent hole is communicated with the outer air opening in the groove bottom face of the clamping groove. According to the drying agent, an air passage is changed through different arrangement of all the assemblies so as to adapt to different external environments, and the technical effect of prolonging the service life of the drying agent is achieved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of vehicle-mounted lamps, in particular to vehicle-mounted lamp anti-fog device. BACKGROUND

[0002] Condensation is the phenomenon that water in the air condenses into liquid and adheres to the surface of an object.

[0003] Vehicle-mounted lamps include headlamps, tail lamps, high beams, low beams, etc. Vehicle-mounted lamps usually need to be provided with a ventilation structure to maintain the balance of internal and external air pressure. The ventilation structure can use a PUW waterproof and breathable film (with a micropore diameter of 0.1-10 μm) to prevent the entry of water droplets (such as rainwater). However, the water vapor molecules in the air are only about 0.0004 μm, and in a humid environment, water vapor can penetrate the waterproof and breathable film into the vehicle-mounted lamp. After a period of accumulation, the external water vapor diffuses in the vehicle-mounted lamp cavity, causing the internal humidity to increase, and the components inside the lamp absorb water; when the vehicle starts or the vehicle-mounted lamp is turned on, the temperature in the lamp rises, and the heated plastic parts release water, causing the water content in the vehicle-mounted lamp to continuously accumulate, which can easily cause condensation on the inside of the lamp shade, affecting the lighting effect of the vehicle-mounted lamp.

[0004] The prior art uses a desiccant placed in the vehicle-mounted lamp and a gas duct structure to solve the above technical problems.

[0005] The prior art discloses a breathable and dehumidifying anti-fog device for a vehicle-mounted lamp, which includes a spiral air flow channel arranged in a shell, two ends of the air flow channel being respectively connected to an air inlet valve and an internal air inlet of the shell, a drying chamber being arranged between the air flow channel and the shell, the drying chamber being connected to the outside of the shell, and sponge being filled in the air flow channel. When external high-humidity water vapor is transmitted into the lamp, the spiral air flow channel is long and filled with sponge, which can reduce the effective area of water vapor diffusion and further increase the diffusion resistance of water vapor, so that the water vapor reaches a dynamic balance in the spiral air flow channel, effectively controlling the amount of water vapor entering the inside of the vehicle-mounted lamp from the outside; in addition, a high-humidity absorbing desiccant is added to the shell to continuously absorb the water vapor in the inside of the vehicle-mounted lamp, effectively controlling the humidity in the lamp, improving the working environment of electronic components, and reducing the risk of fogging in the lamp.

[0006] Another prior art discloses a replaceable vehicle-mounted lamp desiccant device with a vent valve, which combines a waterproof and vent structure of a vehicle-mounted lamp and a replaceable vehicle-mounted lamp desiccant structure into one. Air inside and outside the vehicle-mounted lamp passes through the vent valve, which can balance the pressure difference between the inside and outside of the vehicle-mounted lamp and play a venting role. When air outside the vehicle-mounted lamp enters through the air passage, the water vapor in the air is absorbed by the desiccant, and at the same time, the desiccant can also absorb the moisture in the lamp body, thereby solving the water mist phenomenon in the vehicle-mounted lamp. At the same time, its structure is simple, easy to install and disassemble, and convenient to replace the desiccant, which can be applied to most vehicle-mounted lamps.

[0007] The prior art uses a desiccant to adsorb water vapor entering the inside of a vehicle-mounted lamp, and uses an air passage structure to control the air intake. The prior art has the shortcomings that the desiccant is easy to fail, and it is not easy to replace the desiccant after failure. Although the prior art proposes to control the air intake by designing different air passage structures to prolong the service life of the desiccant, the prior art is still in the exploratory stage as to what shape or structure of the air passage can effectively control the air intake and prolong the service life of the desiccant. In addition, if the air passage structure is too complex, resulting in high production cost, the technology is difficult to popularize and has poor practicality. SUMMARY

[0008] To solve the above technical problems, the utility model provides a vehicle-mounted lamp anti-condensation device, and the specific technical content is described as follows.

[0009] The vehicle-mounted lamp anti-condensation device comprises a main shell and a vent valve, one end of the main shell is provided with an inner recessed clamping groove, the groove bottom surface of the clamping groove is respectively provided with an inner air port and an outer air port, and the groove bottom surface of the clamping groove is selectively provided with a groove.

[0010] The air inlet valve is of a basin type structure, one side faces the groove bottom surface of the clamping groove, and the other side faces the outer side; one end of the air inlet valve is provided with a vent hole, the air inlet valve can be installed in the clamping groove, and the vent hole is communicated with the outer air port of the groove bottom surface of the clamping groove;

[0011] Preferably, the other side of the air inlet valve facing the outer side is provided with a breathable film;

[0012] Preferably, the other side of the air inlet valve facing the outer side is provided with an outer protective net;

[0013] Further preferably, the breathable film is arranged between the outer protective net and the air inlet valve;

[0014] Further preferably, the breathable film is arranged between the outer protective net and the air inlet valve; a corresponding gap is reserved between the recessed surface of the air inlet valve and the outer protective net, and the breathable film and the recessed surface of the air inlet valve are not tightly attached, but have a gap of 10-50 microns.

[0015] The main shell has a ventilation pipe, one end of which communicates with the inner air port of the slot bottom surface of the clamping slot, together constituting a channel for mutual circulation of external air and internal air of the vehicle-mounted lamp.

[0016] The other end of the main shell is provided with a chamber, and the opening of the chamber is provided with a barrier layer.

[0017] Preferably, the chamber is filled with a desiccant, and the barrier layer is used to prevent the desiccant contained in the chamber from leaking to other locations while maintaining a certain air permeability.

[0018] Further preferably, the inner side of the chamber is provided with a plurality of baffles.

[0019] Preferably, the ventilation pipe is arranged inside the chamber, one end of the ventilation pipe communicates with the inner air port, and the other end of the ventilation pipe is close to the inner side of the barrier layer.

[0020] Optionally, the vehicle-mounted lamp anti-fog device further comprises an inner cover which is detachably mounted on the outside of the cavity and the barrier layer.

[0021] Preferably, one side of the inner cover is provided with a plurality of ventilation grooves, the inner side of the inner cover is provided with a plurality of reinforcing ribs, and one end of the reinforcing rib is provided with a pressing strip which is close to the barrier layer.

[0022] Preferably, the slot bottom surface of the clamping slot is provided with the groove, and the two ends of the groove communicate with the inner air port and the outer air port, respectively.

[0023] Further preferably, the slot bottom surface of the clamping slot is provided with the groove, and the two ends of the groove communicate with the inner air port and the outer air port, respectively, and the groove is a plurality of non-intersecting grooves.

[0024] Further preferably, the slot bottom surface of the clamping slot is provided with the groove, and the two ends of the groove communicate with the inner air port and the outer air port, respectively, and the convex surface of the air inlet valve closely contacts the slot bottom surface of the clamping slot to limit the circulation of air from the groove.

[0025] Preferably, the slot bottom surface of the clamping slot is not provided with the groove, and the convex surface of the air inlet valve and the slot bottom surface of the clamping slot maintain a spacing of 10-50 microns as an air passage. When inhaling, the air passage is: external air passes through the ventilation hole, the outer air port, the gap between the air inlet valve and the clamping slot, the inner air port and the ventilation pipe in sequence, and enters the internal part of the vehicle-mounted lamp.

[0026] Further preferably, the convex surface of the air inlet valve is a flat surface or is provided with regular or irregular protrusions or depressions.

[0027] Further preferably, the groove bottom surface of the clamping groove is a plane or is provided with regular or irregular protrusions or depressions.

[0028] Compared with the prior art, the application has the following beneficial effects:

[0029] The application changes the air passage through different settings of various components to adapt to different external environments, thereby prolonging the service life of the desiccant. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 is a structural disassembly schematic diagram of the utility model;

[0031] Figure 2 is a general assembly schematic diagram of the utility model;

[0032] Figure 3 is another view schematic diagram of the general assembly of the utility model;

[0033] Figure 4 is a main shell structure of the utility model;

[0034] Figure 5 is another view schematic diagram of the main shell structure of the utility model;

[0035] Figure 6 is a schematic diagram of the air inlet valve and the outer protective net structure of the utility model.

[0036] Figure 7 is a schematic diagram of the inner cover structure of the utility model.

[0037] In the figure, the corresponding relationship between the component name and the figure number is as follows:

[0038] 1, main shell; 2, air inlet valve; 3, air permeable membrane; 4, outer protective net; 5, barrier layer; 6, inner cover;

[0039] 101, clamping groove; 102, baffle; 103, air pipe; 104, inner air port; 105, groove; 106, outer air port; 107, positioning protrusion one; 108, limiting ring; 109, reinforcing plate;

[0040] 201, limiting groove; 202, positioning protrusion two; 203, positioning recess one; 204, air hole;

[0041] 401, clamping block; 402, positioning groove two;

[0042] 601, air passage groove; 602, abutting bar. DETAILED DESCRIPTION

[0043] The embodiments of the present application will be further described in detail below with reference to the drawings and examples. The following examples are used to illustrate the present application, but cannot be used to limit the scope of the present application.

[0044] In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more than two; the orientation or position relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail" and the like is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as limiting the indicated device or element to have a specific orientation, to be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" and the like are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0045] In the description of the present application, it should be noted that, unless otherwise specified and limited, the terms "connected", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0046] Example 1

[0047] As shown in the accompanying Figure 1 to the accompanying Figure 7 The present embodiment provides a vehicle-mounted lamp anti-condensation device, and the structure from outside (external environment) to inside (vehicle-mounted lamp cavity) is in turn an outer protective net 4, a breathable film 3, an air inlet valve 2, a main shell 1, a barrier layer 5, and an inner cover 6.

[0048] One end of the main shell 1 is provided with an inner recessed clamping groove 101, the clamping groove 101 is respectively provided with an inner air port 104 and an outer air port 106, the groove bottom surface of the clamping groove 101 is provided with a groove 105, the two ends of the groove 105 are respectively communicated with the inner air port 104 and the outer air port 106, one end of the air inlet valve 2 is provided with a vent hole 204, the position of the vent hole 204 corresponds to the position of the outer air port 106, so that air can pass through; the air inlet valve 2 of the present embodiment is a basin type structure, the convex surface thereof can be attached and installed on the groove bottom surface of the clamping groove 101, and the concave surface thereof can be attached and installed on the breathable film 3.

[0049] In different embodiments of the present application, according to different requirements for ventilation rate in different application scenarios, the groove 105 can be a plurality of grooves that do not intersect each other, the inner diameter, length and shape of the groove 105 can be changed, and the present application does not limit this.

[0050] The inner periphery length of the clamping groove 101 is greater than the outer periphery length of the air inlet valve 2, so that the air inlet valve 2 can be installed in the clamping groove 101, and when installed, the position of the air hole 204 at one end of the air inlet valve 2 should correspond to the outer air port 106, and the air permeable film 3 is arranged between the recessed surface of the air inlet valve 2 and the outer protective net 4. In this embodiment, a gap is reserved between the recessed surface of the air inlet valve 2 and the outer protective net 4, which is determined according to the thickness of the air permeable film 3 and the gap reserved between the air permeable film 3 and the recessed surface of the air inlet valve 2, and the air permeable film 3 is not tightly attached to the recessed surface of the air inlet valve 2, but a gap of 10-50 microns is reserved; in the case of exhausting air from inside to outside, the air permeable film 3 is attached to the outer protective net 4 away from the air inlet valve 2 under the action of air pressure, which is beneficial to air permeation; in the case of inhaling air from outside to inside, the air permeable film 3 is tightly attached to the recessed surface of the air inlet valve 2 away from the outer protective net 4 under the action of air pressure, and air can only be inhaled through the air permeable film 3 corresponding to the projection area of the air hole 204, and the permeation amount is small. In this way, the technical effect of achieving a greater exhaust air permeation rate than the inhale air permeation rate can be achieved. The air permeation rate of the air permeable film 3 can be selected according to different requirements of the scene, for example, 1000, 1300, 1500, 2500, 5000, 10000 ml / min (7kpa), etc., which is not limited in the present application.

[0051] In this embodiment, the convex surface of the air inlet valve 2 is tightly attached to the groove bottom surface of the clamping groove 101, when the internal air pressure of the vehicle-mounted lamp is greater than the external air pressure (exhaust), the air passage is: the air in the vehicle-mounted lamp interior passes through the air passage pipe 103, the inner air port 104, the groove 105, the outer air port 106, the air hole 204, the air permeable film 3, and the outer protective net 4 in turn, and is exhausted to the outside of the vehicle-mounted lamp. When the internal air pressure of the vehicle-mounted lamp is less than the external air pressure (inhale), the air passage is: the external air passes through the outer protective net 4, the air permeable film 3, the air hole 204, the outer air port 106, the groove 105, the inner air port 104, and the air passage pipe 103 in turn, and enters the interior of the vehicle-mounted lamp.

[0052] In another embodiment of the present application, the air permeable film 3 is not arranged between the air inlet valve 2 and the outer protective net 4, in which case the air permeation rates of exhausting air from inside to outside and inhaling air from outside to inside are the same.

[0053] The inner end of the main shell 1 is provided with a chamber for accommodating desiccant, and a barrier layer 5 is arranged at the opening of the chamber. The barrier layer 5 is used to prevent the desiccant contained in the chamber from leaking to other positions while maintaining a certain air permeability. One side of the barrier layer 5 is the chamber, and the other side is optionally provided with an inner cover 6. The inner cover 6 can protect the barrier layer 5 from being easily pierced or scratched by sharp external objects, and prevent desiccant leakage. If the present application is used in an environment with high safety, the inner cover 6 can also not be arranged.

[0054] In another embodiment of the present application, the inner side of the chamber is provided with a plurality of baffle plates 102. The distribution of the desiccant in the chamber can be divided by the plurality of baffle plates 102.

[0055] One end of the air pipe 103 is in communication with the inner air port 104, and the other end of the air pipe 103 is in communication with the inside of the vehicle-mounted lamp, which serves as an air inlet and outlet passage. In the present embodiment, the air pipe 103 is arranged inside the chamber to avoid direct contact between air and the desiccant. In another embodiment of the present application, the air pipe 103 can be arranged on the side wall or outside of the chamber. In another embodiment of the present application, one end of the air pipe 103 is in communication with the inner air port 104, and the other end of the air pipe 103 is in close contact with the inner side of the barrier layer 5. The air entering the inside of the vehicle-mounted lamp through the air pipe 103 can contact the desiccant contained in the chamber through the barrier layer 5, so as to remove the moisture in the air.

[0056] One side of the air inlet valve 2 is provided with a positioning recess 203 corresponding to the positioning protrusion 107, so as to accurately position the air inlet valve 2 and ensure that the air inlet hole of the air inlet valve 2 can be in quick and accurate communication with the outer air port 106 during installation.

[0057] The recessed surface of the air inlet valve 2 can be provided with an outer protective net 4. The side surface of the outer protective net 4 is provided with a plurality of clamping blocks 401, and the recessed surface of the air inlet valve 2 is provided with a plurality of limiting grooves 201 corresponding to the clamping blocks 401. The outer protective net 4 is used to prevent the air-permeable film 3 from falling off, being damaged or being broken.

[0058] The recessed surface of the air inlet valve 2 is provided with a positioning protrusion 202, and one side of the outer protective net 4 is provided with a positioning groove 402 corresponding to the positioning protrusion 202, so that the clamping blocks 401 of the outer protective net 4 can be smoothly connected with the limiting grooves 201.

[0059] One side of the inner cover 6 is provided with a plurality of air passage grooves 601, and the inner side of the inner cover 6 (the side close to the barrier layer 5) is provided with a plurality of reinforcing ribs. One end of the reinforcing ribs is provided with a pressing strip 602, which is in close contact with the barrier layer 5. The pressing strip 602 can improve the installation stability of the barrier layer 5, prevent the desiccant from being easily removed, prevent the water absorption volume from being easily opened and leaked after expansion, and prevent the inner cover 6 from being directly and fully in contact with the barrier layer 5 to reduce the flow efficiency of air.

[0060] In order to realize the installation limit position of the main shell 1, ensure the accurate and stable installation effect, the outer side of the main shell 1 is provided with a limiting ring 108, and a plurality of reinforcing plates 109 are uniformly arranged between one side of the limiting ring 108 and the main shell 1, so as to improve the connection strength between the limiting ring 108 and the main shell 1, and facilitate long-term stable use.

[0061] Embodiment 2:

[0062] In this embodiment, one end of the main shell 1 is provided with an inner recessed clamping groove 101, and the clamping groove 101 is provided with an inner air port 104. (The difference from embodiment 1 is that the groove bottom surface of the clamping groove 101 is not provided with a groove 105 and an outer air port 106) One end of the air inlet valve 2 is provided with a ventilation hole 204. The convex surface of the air inlet valve 2 is not tightly combined with the groove bottom surface of the clamping groove 101, but a gap of 10-50 microns is reserved as an air passage. In this embodiment, the air passage during air suction is: the external air passes through the outer protective net 4, the air permeable film 3, the ventilation hole 204, the gap between the air inlet valve 2 and the clamping groove 101, the inner air port 104, and the ventilation pipe 103 into the inside of the vehicle-mounted lamp in sequence. The air passage during air exhaust is: the air in the inside of the vehicle-mounted lamp passes through the ventilation pipe 103, the inner air port 104, the gap between the air inlet valve 2 and the clamping groove 101, the ventilation hole 204, the air permeable film 3, and the outer protective net 4 in sequence and is exhausted to the outside of the vehicle-mounted lamp.

[0063] The difference between this embodiment and embodiment 1 is that the gap between the air inlet valve 2 and the clamping groove 101 replaces the function of the groove 105, and the air exhaust or suction is not through the groove 105, but through the gap between the air inlet valve 2 and the clamping groove 101. In this embodiment, the convex surface of the air inlet valve 2 can be a plane, or can be provided with regular or irregular protrusions or depressions, and can also be provided with different surface smoothness; the groove bottom surface of the clamping groove 101 can be a plane, or can be provided with regular or irregular protrusions or depressions, and can also be provided with different surface smoothness; a sponge layer can also be arranged between the air inlet valve 2 and the clamping groove 101; the above-mentioned arrangement can increase the contact area of the air and the convex surface of the air inlet valve 2 and / or the groove bottom surface of the clamping groove 101. The present application does not limit this.

[0064] In use, the main shell 1 with the chamber is inserted into the installation position of the vehicle-mounted lamp, and the end with the clamping groove 101 faces the outside. The air in the vehicle-mounted lamp communicates with the outside through the ventilation pipe 103 and the air inlet valve 2. And the air passage is changed by the different arrangement of each component, so as to adapt to different external environments, and has the technical effect of prolonging the service life of the desiccant.

[0065] The embodiments of the present application are given for the purpose of illustration and description, and are not intended to be exhaustive or to limit the present application to the forms disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art. Embodiments were chosen and described in order to best explain the principles of the present application and its practical application, and to thereby enable others skilled in the art to best utilize the present application with various modifications as are suited to the particular use contemplated.

Claims

1. A vehicle-mounted lamp anti-condensation device, comprising a main shell (1) and an air inlet valve (2), characterized in that: One end of the main shell (1) is provided with an inner recessed clamping groove (101), the groove bottom surface of the clamping groove (101) is respectively provided with an inner air port (104) and an outer air port (106), and the groove bottom surface of the clamping groove (101) is selectively provided with a groove (105); The air inlet valve (2) is of a basin type structure, one side faces the groove bottom surface of the clamping groove (101), the other side faces the outside, one end of the air inlet valve (2) is provided with a ventilation hole (204), the air inlet valve (2) can be installed in the clamping groove (101), and the ventilation hole (204) is communicated with the outer air port (106) of the groove bottom surface of the clamping groove (101).

2. The anti-mist device for vehicle-mounted lamps according to claim 1, characterized in that: The other side of the air inlet valve (2) facing the outside is provided with a breathable film (3) and an outer protective net (4), the breathable film (3) is arranged between the outer protective net (4) and the air inlet valve (2), a corresponding gap is reserved between the recessed surface of the air inlet valve (2) and the outer protective net (4), the breathable film (3) is not closely attached to the recessed surface of the air inlet valve (2), a gap of 10-50 microns is left, one side of the clamping groove (101) is provided with a positioning protrusion one (107), one side of the air inlet valve (2) is provided with a positioning groove one (203) corresponding to the positioning protrusion one (107), the recessed surface edge of the air inlet valve (2) is provided with a positioning protrusion two (202), and one side of the outer protective net (4) is provided with a positioning groove two (402) corresponding to the positioning protrusion two (202), the side surface of the outer protective net (4) is provided with a plurality of clamping blocks (401), and the recessed surface of the air inlet valve (2) is provided with a plurality of limiting grooves (201) capable of being connected with the clamping blocks (401).

3. The anti-mist device for vehicle-mounted lamp according to claim 1, characterized in that: The main shell (1) has a ventilation pipe (103), one end of the ventilation pipe (103) is communicated with the inner air port (104) of the groove bottom surface of the clamping groove (101), and together they constitute a channel for mutual circulation of external air and internal air of the vehicle-mounted lamp, the other end of the main shell (1) is provided with a cavity, the opening of the cavity is provided with a barrier layer (5), and the cavity is filled with a desiccant.

4. The anti-mist device for vehicle-mounted lamp according to claim 3, characterized in that: The outer side of the main shell (1) is provided with a limiting ring (108), and a plurality of reinforcing plates (109) are uniformly arranged between one side of the limiting ring (108) and the main shell (1).

5. The anti-mist device for vehicle-mounted lamp according to claim 3, characterized in that: The inner side of the cavity is provided with a plurality of baffles (102), the ventilation pipe (103) is arranged inside the cavity, one end of the ventilation pipe (103) is communicated with the inner air port (104); and the other end of the ventilation pipe (103) is closely attached to the inner side of the barrier layer (5).

6. The anti-mist device for vehicle-mounted lamps according to claim 3, characterized in that: The vehicle-mounted lamp anti-fog device further comprises an inner cover (6) which is detachably installed on the outer side of the cavity and the barrier layer (5), one side of the inner cover (6) is provided with a plurality of ventilation grooves (601), one side of the inner cover (6) close to the barrier layer (5) is provided with a plurality of reinforcing ribs, one end side of the reinforcing ribs is provided with a pressing strip (602), and the pressing strip (602) is closely attached to the barrier layer (5).

7. The anti-mist device for vehicle-mounted lamps according to claim 1, characterized by: The bottom surface of the card slot (101) is provided with the groove (105), and the two ends of the groove (105) are respectively communicated with the inner air port (104) and the outer air port (106).

8. The anti-mist device for vehicle-mounted lamp according to claim 7, characterized in that: The groove (105) is a plurality of non-intersecting grooves, and the convex surface of the air inlet valve (2) is closely combined with the bottom surface of the card slot (101) to limit the air flow from the groove (105).

9. The anti-mist device for vehicle-mounted lamp according to claim 1, characterized in that: The bottom surface of the card slot (101) is not provided with the groove (105), and the convex surface of the air inlet valve (2) and the bottom surface of the card slot (101) are kept at a distance of 10-50 microns as an air passage.

10. The anti-mist device for vehicle-mounted lamps according to claim 9, characterized in that: The convex surface of the air inlet valve (2) is a plane or is provided with regular or irregular protrusions or depressions, and the bottom surface of the card slot (101) is a plane or is provided with regular or irregular protrusions or depressions.

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