Disclosure of utility model
One of the objectives of the present utility model is to provide a lighting module having the advantages of small opening, high light efficiency and small volume.
The second object of the present utility model is to provide a low beam lighting device, which is suitable for low beam lighting, and the lighting module used in the low beam lighting device has the advantages of small opening, high light efficiency and small volume, and is beneficial to the miniaturization of the low beam lighting device.
The utility model further provides a high beam lighting device, which is suitable for realizing high beam lighting, and the adopted lighting module has the advantages of small opening, high light efficiency and small volume, and is beneficial to realizing the miniaturization of the high beam lighting device.
The utility model provides a high-low beam lighting device, which is suitable for realizing low beam lighting and high beam lighting, and the adopted lighting module has the advantages of small opening, high light efficiency and small volume, thereby being beneficial to realizing the miniaturization of the high-low beam lighting device.
The fifth object of the present utility model is to provide a control method of a high-low beam lighting device, which reduces the design requirement of a thermal system and reduces the cost of a lighting module when the total power of the lighting module is reduced by implementing a high beam function.
The utility model aims at providing a car lamp, and the lighting module adopted by the car lamp has the advantages of small opening, high light efficiency and small volume, and is beneficial to realizing the miniaturization of the car lamp.
In order to achieve the above object, a first aspect of the present utility model provides an illumination module, including a light source, a condenser, and a lens, where the condenser includes at least two condensing units connected in sequence, the light source is disposed corresponding to the condensing units, the condenser is configured to collect light emitted by the light source and make the light enter the lens, the lens includes at least one lens light-emitting surface and at least two lens light-entering surfaces, and at least one of the lens light-emitting surface and the lens light-entering surface is a unidirectional collimation surface.
Preferably, at least one of the lens light incident surfaces is a cylindrical surface or a cylinder-like surface formed by stretching a sectional line in a horizontal direction thereof along a sectional line in a vertical direction thereof, and/or,
The lens light-emitting surface is a cylindrical surface or a similar cylindrical surface formed by stretching a sectional line in the vertical direction along a sectional line in the horizontal direction.
Preferably, the light condensing unit is a first light condensing unit having a first light condensing portion and a light passing portion, and the light emitted from the light source is incident on the first light condensing unit via the light incident surface of the first light condensing portion and is transmitted via the light passing portion to be emitted, or
The light condensing unit is a second light condensing unit, the second light condensing unit is provided with a second light condensing part, and the light emitted by the light source enters the second light condensing unit through the light incident surface of the second light condensing part and is emitted from the second light condensing part.
Preferably, the lens light incident surface is arranged in one-to-one correspondence with the light condensing units.
Preferably, at least two light condensing units are integrally formed, and the light emergent surfaces of the at least two light condensing units are connected to form a smooth curved surface or plane.
Preferably, the light emergent surfaces of the lenses are connected to form a smooth curved surface or plane.
A second aspect of the present utility model provides a low beam lighting device comprising at least one lighting module as described in the first aspect, and further comprising a low beam cutoff structure for forming a low beam cutoff.
Preferably, the low beam cutoff structure is disposed at a lower boundary of the light emitting surface of the condenser, and the focal point of the lens is located at or near the low beam cutoff structure.
Preferably, the low beam lighting device further comprises a first light shielding plate, the low beam cutoff structure is arranged at the front end boundary of the first light shielding plate, the first light shielding plate is arranged in a light path between the condenser and the lens, and the focal point of the lens is positioned at or near the low beam cutoff structure.
Still preferably, the solar energy collecting device further comprises a second light shielding plate for preventing sunlight from focusing, and the second light shielding plate is arranged below the first light shielding plate and fixedly connected with the first light shielding plate.
A third aspect of the present utility model provides a high beam lighting device comprising at least one lighting module according to the first aspect.
A fourth aspect of the present utility model provides a high-low beam lighting device, comprising at least two lighting modules according to the first aspect, wherein at least one lighting module is a low beam lighting module capable of forming a low beam type, the light source is a low beam light source, at least one lighting module is a high beam lighting module capable of forming a high beam type, and the light source is a high beam light source.
Preferably, the low beam lighting module and the high beam lighting module are arranged in a lateral direction or a longitudinal direction.
A fifth aspect of the present utility model provides a control system for a high-low beam lighting apparatus for controlling the high-low beam lighting apparatus, the control system comprising a control unit connected to a plurality of low beam light sources and a plurality of high beam light sources, respectively, the control unit being configured to control the low beam light sources to be turned on and the high beam light sources to be turned off when a low beam light pattern is formed, and to control the high beam light sources to be turned on and a control portion to be turned on when a high beam light pattern is formed, so that a total power for forming the high beam light pattern is the same as a total power for forming the low beam light pattern.
Preferably, the low beam light source comprises a main low beam light source for contributing brightness and an auxiliary low beam light source for contributing widening, and the control unit is used for controlling the high beam light source to be turned on, controlling at least one main low beam light source to be turned off and controlling the auxiliary low beam light source to be turned on when a high beam shape is formed.
A sixth aspect of the present utility model provides a vehicle lamp comprising the above-described lighting module, a low beam lighting device, a high beam lighting device, or a control system that performs the above-described high beam lighting device.
According to the technical scheme, the lighting module provided by the utility model adopts the lens capable of carrying out unidirectional collimation on the light, so that the light deflects on the light incident surface and/or the light emergent surface of the lens, the convergence is realized in a certain single direction, an approximately rectangular lighting light shape is formed, an extra specially designed optical system is not needed, the lighting module is simple in structure, for example, the size of the light emergent surface of the lens in the up-down direction is smaller than or equal to 20mm, thus the requirement of a car lamp with a narrow and long shape is met, and compared with a common spherical lens in the prior art, the lens provided by the utility model can be used for independently adjusting the surface types of the light incident surface and the light emergent surface of the lens, and the dimming step in the light distribution process is greatly simplified. In addition, the condenser combined by at least two condensing units is used as a primary optical element, and the light source and the condensing units are correspondingly arranged, so that the luminous flux is ensured, the volume of the lighting module is reduced, and the miniaturization is realized.
Other advantages and technical effects of the preferred embodiments of the present utility model will be further described in the following detailed description.
Detailed Description
The following detailed description of the embodiments of the utility model is provided in connection with the accompanying drawings, it being understood that the embodiments described herein are for purposes of illustration and explanation only, and the scope of the utility model is not limited to the following embodiments.
In the description of the present utility model, it should also be noted that, unless explicitly specified and limited otherwise, the terms "mounted" and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, integrally connected, directly connected, indirectly connected through an intermediary, or in communication between two elements or in interaction with each other. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated, and thus, features defining "first," "second," or the like, may explicitly or implicitly include one or more of such features.
As a basic embodiment of the present utility model, as shown in fig. 1 to 7, there is provided a lighting module including a light source 1, a condenser and a lens 3, the condenser includes at least two condensing units 2 connected in sequence, the light source 1 is disposed corresponding to the condensing units 2, the condenser is arranged to be capable of converging light emitted from the light source 1 and making it enter the lens 3, the lens 3 includes at least one lens light-emitting surface 302 and at least two lens light-entering surfaces 301, and at least one of the lens light-emitting surface 302 and the lens light-entering surface 301 is a unidirectional collimation surface.
The utility model designs the lens, so that at least one of the lens light incident surface 301 and the lens light emergent surface 302 is a unidirectional collimation surface, namely, light rays are deflected on the lens light incident surface 301 and/or the lens light emergent surface 302, and are converged in a certain single direction to form an approximately rectangular illumination light shape, and no extra optical system is needed for special design, so that the illumination module has a simple structure, for example, the dimension of the lens light emergent surface 302 in the up-down direction is smaller than or equal to 20mm, thereby meeting the requirement of a car lamp with a narrow and long shape. In addition, the utility model adopts the condenser combined by at least two condensing units 2 as a primary optical element, and ensures that the light source 1 and the condensing units 2 are correspondingly arranged, thereby ensuring the luminous flux, reducing the volume of the lighting module and being beneficial to the realization of miniaturization.
As a preferred embodiment of the present utility model, as shown in fig. 1 to 7, at least one lens light incident surface 301 is a cylindrical surface or a cylinder-like surface formed by stretching a sectional line in its horizontal direction x along a sectional line in its vertical direction z, and/or a lens light emitting surface 302 is a cylindrical surface or a cylinder-like surface formed by stretching a sectional line in its vertical direction z along a sectional line in its horizontal direction x. The lens light incident surface 301 has an optical characteristic of unidirectional collimation of light in a horizontal direction x, the lens light incident surface 302 has an optical characteristic of unidirectional collimation of light in a vertical direction z, and it is to be noted that, in a horizontal section, "the unidirectional collimation in the horizontal direction" means that a cross section of the lens light incident surface 301 in the horizontal direction x is a convex curve, which has a convergent effect, a greater deflection degree on light, and can have a certain collimation effect on divergent light, whereas in a vertical section, the cross section of the lens light incident surface 301 in the vertical direction z is a straight line or a curve close to a straight line (when the cross section of the lens light incident surface 301 in the vertical direction z is a curve close to a straight line, the lens light incident surface 301 is a cylindrical-like surface), so that the deflection capability of the lens light incident surface 301 on divergent light is far from a plane in a horizontal section than the deflection capability of the lens light in a horizontal section, and has no collimation effect, namely, the lens light incident surface 301 has a single direction on divergent light, namely, the lens light incident surface 301 is mainly a collimation effect on the divergent light in the horizontal direction x, and in the vertical section is a straight line in a straight line, the same as the vertical section, the cross section of the lens light incident surface 302 is a curve close to a straight line, and the deflection capability of the lens light incident surface in the vertical direction is a curve close to a straight line in a straight line, the straight line in the vertical section of the plane, the plane is a curve close to a plane 302, has no collimation effect. Since the light incident surface 301 deflects the light in the horizontal direction x, and the light emergent surface 302 deflects the light in the vertical direction z, the light incident surface 301 and/or the light emergent surface 302 has a unidirectional collimation effect, so that an approximately rectangular light shape can be obtained.
The thickness of the lens 3 is not limited in the present utility model, and the lens 3 may be a thin lens as shown in fig. 8 or a thick lens as shown in fig. 1 to 7.
As a preferred embodiment of the present utility model, as shown in fig. 1 to 7, the lens light incident surfaces 301 are provided in one-to-one correspondence with the condensing units 2. Specifically, the plurality of lens light incident surfaces 301 can respectively adjust the light passing through the lens light incident surfaces 301, the plurality of light condensing units 2 are also provided, and the light condensed by the light condensing units 2 is adjusted by the corresponding lens light incident surfaces 301, so that the light distribution is more convenient.
As a preferred embodiment of the present utility model, as shown in fig. 1, 2 and 6, the light condensing unit 2 is a first light condensing unit, the first light condensing unit has a first light condensing portion 201 and a light transmitting portion 202, and the light emitted from the light source 1 enters the first light condensing unit through the light incident surface of the first light condensing portion 201, is transmitted through the light transmitting portion 202, and is emitted. Specifically, as shown in the figure, the light condensing unit 2 may be a first light condensing unit having a light transmitting portion 202, where the light transmitting portion 202 has a certain length, and light is emitted after being transmitted in the light transmitting portion 202.
Alternatively, as shown in fig. 3, 4, 5, and 7, the light condensing unit 2 is a second light condensing unit, the second light condensing unit has a second light condensing portion 203, and the light emitted from the light source 1 enters the second light condensing unit through the light incident surface of the second light condensing portion 203 and exits from the second light condensing portion 203. Specifically, the second light condensing unit does not have a light transmitting portion with a certain length, and is incident from the light incident surface of the second light condensing unit, and then is converged by only the second light condensing unit 203 connected to the light incident surface and is emitted. The second condensing unit is smaller in volume than the first condensing unit.
In the utility model, the shape of the condensing unit is not limited, and the transparent light guide member with the condensing function can meet the design requirement.
As a preferred embodiment of the present utility model, as shown in fig. 1 to 7, in the condenser, at least two condensing units 2 are integrally formed, and light emitting surfaces of the condensing units 2 are connected to form a smooth curved surface or plane. Specifically, the condensing units 2 are provided with a plurality of condensing units, the integrated forming arrangement is beneficial to processing and installation, the installation structure of parts is reduced, the light emergent surfaces of the condensing units 2 are connected to form a smooth curved surface or a smooth plane after the condensing units 2 are integrated into a whole, so that the engagement between the sub-light shapes is facilitated, and the dark area of the sub-light shape corresponding to each condensing unit 2 is prevented when the sub-light shapes are engaged.
As a preferred embodiment of the present utility model, as shown in fig. 1 to 7, at least one lens light-emitting surface 302 is formed to be smoothly curved or planar in the lens 3. Specifically, the lens light-emitting surface 302 is connected to form a smooth curved surface or plane, which not only prevents the dark area of the corresponding sub-light shapes when connected, but also makes the appearance of the lens more beautiful when the module is observed from the outside of the car light.
The lighting module provided by the utility model can be used for a lighting device, and can be used as any module of high beam, low beam, auxiliary high beam, corner lamp, fog lamp and the like in the lighting device, the utility model is not particularly limited, and the lighting device can be divided into a low beam lighting device, a high beam lighting device, a low beam lighting device and the like according to different lighting functions.
For convenience of description, the low beam lighting device, the high beam lighting device, and the high beam lighting device will be described below schematically with reference to the accompanying drawings, respectively.
In one aspect of the embodiments of the present utility model, as shown in fig. 1 to 5, a low beam lighting device is provided, which includes at least one lighting module as described above, and further includes a low beam cutoff structure 4 for forming a low beam cutoff. The light emitted by the light source 1 is converged by the light condensing unit 2, cut off by the low beam cutoff structure 4, and then readjusted by the lens light incident surface 301 and/or the lens light emergent surface 302 to be projected to form a low beam light shape with a low beam light and dark cutoff line. At least one of the lens light incident surface 301 and the lens light emergent surface 302 has a unidirectional collimation function so as to adjust light rays.
Further, the low beam cutoff 4 is a primary low beam cutoff and/or an auxiliary low beam cutoff. Specifically, in the same lighting module, the main low-beam cutoff structure for forming the main low-beam cutoff and the auxiliary low-beam cutoff structure for forming the auxiliary low-beam cutoff may exist at the same time or separately.
Alternatively, as shown in fig. 1 to 4, the low beam cutoff 4 is disposed at the lower boundary of the light exit surface of the condenser, and the focal point of the lens 3 is located at or near the low beam cutoff 4. In order to realize the low beam cutoff, the cutoff structure 4 may be cut directly at the lower side boundary of the light emitting surface of the condenser, the condensing unit 2 of the condenser may not be limited to a first condensing unit having a light passing portion or a second condensing unit having no light passing portion, the low beam cutoff may be realized by cutting the low beam cutoff structure 4, and the focal point of the lens 3 may be disposed at or near the low beam cutoff structure 4 such that the formed low beam cutoff is clear, where "near" means within a range of 2mm around the low beam cutoff structure.
Alternatively, as shown in fig. 5, the low beam lighting device includes a first shade 5, the low beam cutoff structure 4 is disposed at a front end boundary of the first shade 5, the first shade 5 is disposed in an optical path between the condenser and the lens 3, and a focal point of the lens 3 is located at or near the low beam cutoff structure 4. Specifically, the low beam cutoff can also be achieved by providing the first shade 5 with the low beam cutoff structure 4, and the focal point of the lens 3 is disposed at or near the low beam cutoff structure 4 so that the low beam cutoff is clear, where "near" means within 2mm of the circumference of the low beam cutoff structure.
Further, the low beam lighting device further comprises a second light shielding plate 6 for preventing sunlight from focusing, and the second light shielding plate 6 is arranged below the first light shielding plate 5 and fixedly connected with the first light shielding plate 5. Specifically, the second light shielding plate 6 is used as a sunlight-proof focusing plate, can be fixedly connected with the first light shielding plate 5, and is used as a fixing support of the first light shielding plate 5, so that the installation structure of the first light shielding plate 5 is saved.
Alternatively, the low-beam lighting device may further include a plurality of lighting modules, whereby sub-light shapes formed by the respective plurality of lighting modules are superimposed to be a low-beam light shape of the low-beam lighting device.
As a preferred embodiment of the present utility model, the low beam lighting device includes two lighting modules, namely a main low beam module and an auxiliary low beam module, wherein the main low beam module can correspondingly emit to form a main low beam light shape, and the auxiliary low beam module can correspondingly emit to form an auxiliary low beam light shape. Specifically, the main low beam module and the auxiliary low beam module respectively include a plurality of light sources 1, a plurality of light condensing units 2 and lenses 3, the light condensing units 2 are arranged along a transverse direction and are integrally formed, and the lens light incident surface 301 has a plurality of lens light incident surfaces and corresponds to the light condensing units 2. The light source 1 is emitted by the light condensing unit 2 and the lens 3 to form a plurality of sub light shapes, and the plurality of sub light shapes are combined to form a main low light shape or an auxiliary low light shape with a low light cut-off line.
The main low beam light shape and the auxiliary low beam light shape are overlapped to obtain the low beam light shape of the low beam lighting device, the main low beam light shape can improve the central brightness of the low beam light shape, and the auxiliary low beam light shape can enable the widening of the low beam light shape to be good.
Of course, the plurality of lighting modules can be arranged transversely or vertically, and the application is not particularly limited and can be reasonably arranged according to requirements.
Optionally, the main low beam module and the auxiliary low beam module are arranged along a transverse direction, and an arrangement direction of the lighting module is parallel to an arrangement direction of the light condensing unit.
In another aspect of the present utility model, as shown in fig. 6 and 7, a high beam lighting device is provided, which includes at least one lighting module described above. The light rays emitted from the light source 1 are converged by the condenser, and are emitted to form a high beam shape after being regulated by the lens light incident surface 301 and the lens light emergent surface 302.
Alternatively, the high beam lighting device may further include a plurality of lighting modules, whereby sub-light shapes formed by the respective plurality of lighting modules are superimposed to be the high beam shape of the high beam lighting device.
The high beam lighting device comprises two lighting modules, namely a main high beam module and an auxiliary high beam module, wherein the main high beam module can correspondingly emit to form a main high beam shape, and the auxiliary high beam module can correspondingly emit to form an auxiliary high beam shape. Specifically, the main high beam module and the auxiliary high beam module respectively include a plurality of light sources 1, a plurality of light condensing units 2 and lenses 3, the light condensing units 2 are arranged along a transverse direction and are integrally formed, and the lens light incident surface 301 has a plurality of lens light incident surfaces and corresponds to the light condensing units 2. The light source 1 is emitted by the light condensing unit 2 and the lens 3 to form a plurality of sub-light shapes, and the sub-light shapes are combined to form a main high beam shape or an auxiliary high beam shape.
The main high beam shape and the auxiliary high beam shape are overlapped to obtain the high beam shape of the high beam lighting device, the main high beam shape can improve the central brightness of the high beam shape, and the auxiliary high beam shape can lead the widening of the high beam shape to be better. Of course, in other embodiments, the plurality of condensing units 2 in the lighting module may correspond to one lens light incident surface 301 for ADB high beam illumination.
Of course, the plurality of lighting modules can be arranged transversely or vertically, and the application is not particularly limited and can be reasonably arranged according to requirements.
Optionally, the main high beam module and the auxiliary high beam module are arranged along a transverse direction, and an arrangement direction of the lighting module is parallel to an arrangement direction of the light condensing unit.
In still another aspect of the embodiments of the present utility model, as shown in fig. 9 to 13, a high-low beam lighting device is provided, wherein the high-low beam lighting device includes two lighting modules, one of the lighting modules is a low beam lighting module capable of forming a low beam shape, the light source 1 is a low beam light source 101, the other lighting module is a high beam lighting module capable of forming a high beam shape, and the light source 1 is a high beam light source 102.
As a preferred embodiment of the present utility model, the low beam lighting module and the high beam lighting module share the same lens 3, and the low beam lens region and the high beam lens region are respectively divided into the lens 3. As shown in fig. 13, the high-low beam lighting device is divided into a low beam lighting module and a high beam lighting module with a broken line as a boundary.
Alternatively, the low beam lighting module and the high beam lighting module may be arranged in a lateral direction or a longitudinal direction. As illustrated in fig. 10 to 13, the low beam lighting module is disposed above the high beam lighting module when arranged in the longitudinal direction. As shown in fig. 13, the condenser of the low beam lighting module and the condenser of the high beam lighting module can be integrally formed, so as to save the installation structure. It should be noted that the type of the condenser is not limited.
Optionally, in order to save the cost of the circuit board 7, as shown in fig. 10 to 13, the low beam light source and the high beam light source are disposed on the same circuit board 7, and meanwhile, in this manner, the light source 1 is cooled, and the efficient heat dissipation can be realized by only disposing one radiator 9, so that the installation space is saved.
The lens 3 may be mounted on a mounting surface (which may be a mounting surface of a heat sink 9) by a lens holder 8. The lens holder 8 is mounted on the mounting surface by means of fasteners 10. In the high-low beam lighting device, a baffle 11 for preventing light channeling is further provided between the lens 3 and the condenser, for preventing low beam light from entering a lens region corresponding to the high beam, and also preventing high beam light from entering a lens region corresponding to the low beam.
As another basic embodiment of the present utility model, there is provided a control system of a high-low beam lighting apparatus for controlling the above-mentioned high-low beam lighting apparatus, and the control system includes a control unit connected to the plurality of low beam light sources 101, the plurality of high beam light sources 102, respectively, for controlling the low beam light sources 101 to be turned on and the high beam light sources 102 to be turned off when forming the low beam light pattern, and controlling the high beam light sources 102 to be turned on and controlling a portion of the low beam light sources 101 to be turned off when forming the high beam light pattern so that the total power forming the high beam light pattern is the same as the total power forming the low beam light pattern.
According to the present utility model, the number of low beam light sources 101 is greater than the number of high beam light sources. For example, the number of low beam light sources 101 may be set to four, the number of high beam light sources 102 may be set to two, the low beam light sources 101 are disposed above the high beam light sources 102, and the power of each high beam light source 102 and each low beam light source 101 is uniform. When forming the low beam shape, the control unit controls all low beam light sources 101 to be turned on and controls all high beam light sources 102 to be turned off. When forming the high beam pattern, the control unit controls all the high beam light sources 102 to be turned on and controls the two low beam light sources 101 to be turned on and the two low beam light sources 101 to be turned off, so that the total power forming the high beam pattern is the same as the total power forming the low beam pattern. The lighting device has the advantages that the maximum total power of the lighting device can be reduced when the high beam function is realized, the design requirement of a thermal system is reduced, and the cost of the lighting device is lower. Or the power of each high beam light source 102 and each low beam light source 101 is not uniform as long as the total power forming the low beam light pattern and the total power forming the high beam light pattern are the same. For example, the number of low beam light sources 101 is set to six, the number of high beam light sources 102 is set to two, the power of each low beam light source 101 is 2 watts, and the power of each high beam light source 102 is 4 watts, then when the high beam function is implemented, four low beam light sources need to be turned off, so that the total power forming the low beam light pattern and the total power forming the high beam light pattern are the same, and are both 12 watts.
In one embodiment of the present utility model, the low beam light source 101 comprises a main low beam light source for contributing to the center brightness of the low beam pattern and an auxiliary low beam light source for contributing to the widening of the low beam pattern, and the control unit is used for controlling the high beam light source 102 to be turned on, controlling a part of the main low beam light source to be turned off and controlling the auxiliary low beam light source to be turned on when the high beam pattern is formed. Therefore, the left and right broadening of the light shape is prevented from being insufficient when the high beam function is started, the left and right range of the high beam illumination is insufficient, namely, under the high beam function, only part of main low beam light sources are turned off, the intersection brightness of the H-H axis and the V-V axis of the high beam shape on a light distribution screen still meets the regulation requirement of being more than 80% E max value, the left and right broadening of the light shape is not affected, the maximum middle power of the illumination device can be effectively reduced under the condition that the user experience is not affected, the design requirement of a thermal system is reduced, and the cost of the illumination device is lower.
In addition, the utility model also provides a car lamp, which comprises the lighting module or a control system of the far-near light illuminating device. The vehicle lamp has all the advantages of the above-mentioned lighting module and the control system of the far-near light illuminating device, and will not be described in detail herein.
The utility model further provides a vehicle, which comprises the vehicle lamp. The vehicle has all the advantages of the above-mentioned lighting module and the control system of the high-low beam lighting device, and will not be described in detail here.
The preferred embodiments of the present utility model have been described in detail above with reference to the accompanying drawings, but the present utility model is not limited to the specific details of the above embodiments, and various simple modifications can be made to the technical solution of the present utility model within the scope of the technical concept of the present utility model, and all the simple modifications belong to the protection scope of the present utility model.
In addition, the specific features described in the above embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, various possible combinations are not described further.
Moreover, any combination of the various embodiments of the utility model can be made without departing from the spirit of the utility model, which should also be considered as disclosed herein.