Variable resistance power adjustment device and lamp

A variable resistance power adjustment device and lamp. The variable resistance power adjustment device includes a mounting base, keycap and resistance adjustment module. The mounting base connecting to the lamp body, working with the lamp body to form a mounting cavity in an enclosure way and provided with a through-hole connecting to the mounting cavity; a keycap connecting to the mounting base flexibly and stretching into the through-hole partially; the resistance adjustment module provided in the mounting cavity, the adjustment part of the resistance adjustment module connecting to the keycap, the resistance adjustment module connects to the driving power supply of the lamp body; the keycap moves to drive the adjustment part of the resistance adjustment module to move, so that the corresponding resistance can be switched into the driving power supply from the resistance adjustment module and the resistance adjustment module adjusts the power of the whole lamp body.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims the priority of Chinese Patent Application No. 2020212118024 filed on Jun. 24, 2020, the disclosure of which is incorporated herein by reference.

FIELD

The present disclosure relates to the technical field of lighting equipment, particularly to a variable resistance power adjustment device and a lamp using the variable resistance power adjustment device.

BACKGROUND

Usually, power adjustment of LED lamps requires special light dimmers, such as 0-10V dimmer, controllable silicon dimmer, etc. These dimmers are usually independent from lamps, and the specification of dimmers should match with that of the driving power supply inside LED lamps. Such an operation mode is troublesome, and the circuit is likely to be burnt and accidents are caused when the specification of the dimmer does not match that of the driving power supply.

SUMMARY

The present disclosure mainly aims to provide a variable resistance power adjustment device to simplify the power control mode of lamps and improve the working stability of lamps.

To achieve the objective, the variable resistance power adjustment device of present disclosure is used for adjusting the power of the lamp body. The variable resistance power adjustment device comprises:

the mounting base connecting to the lamp body, working with the lamp body to form a mounting cavity in an enclosure way and provided with a through-hole connecting to the mounting cavity;

a keycap connecting to the mounting base flexibly and stretching into the through-hole partially; anda resistance adjustment module provided in the mounting cavity, the adjustment part of the resistance adjustment module connecting to the keycap, the resistance adjustment module connects to the driving power supply of the lamp body electrically; the keycap rotates or slides to drive the adjustment part of the resistance adjustment module to rotate or slide, so that the corresponding resistance can be switched in the driving power supply from the resistance adjustment module and the resistance adjustment module adjusts the power of the whole lamp body.

In one of the embodiments of the present disclosure, the resistance adjustment module comprises a fixed resistor and a potentiometer, the fixed resistor and the potentiometer switch in the driving power supply of the lamp body in series;the adjustment part of the potentiometer connects to the keycap.

In one of the embodiments of the present disclosure, the potentiometer is a knob-type potentiometer;the surface of the keycap facing the mounting base is provided with connecting rods which are provided in the through-hole and connects to the knob-type potentiometer.

In one of the embodiments of the present disclosure, the external surface of the mounting base is also provided with limit slots which are provided around the through-hole;the surface of the keycap facing the mounting base is provided with a protruding limit post, the limit post and the connecting rod are provided in parallel, and the limit post can be provided in the limit slots in a slide way.

In one of the embodiments of the present disclosure, the external surface of the mounting base is provided with several locating slots which are provided in a circular shape around the through-hole and provided at intervals with the limit slots;the surface of the keycap facing the mounting base is provided with a protruding positioning column, the positioning column and the connecting rod are provided in parallel, and positioning column can be provided in the locating slot in a slide way.

In one of the embodiments of the present disclosure, the surface of the mounting base facing the keycap is provided with several locating bars which configured in a radiation shape centering on the through-hole, and two adjacent the locating bars form the locating slot.

In one of the embodiments of the present disclosure, the limit slots are arc slots, the angle between connection lines of two ends of the arc slots and the through-hole is α;the rotating angle of the potentiometer is β, and α≤β.

In one of the embodiments of the present disclosure, the mounting base comprises:a cover plate provided on the lamp body and provided with an offsetting hole; andthe base provided on the lamp body, working with the lamp body to form the mounting cavity in an enclosure way, provided correspondingly to the offsetting hole, provided with the through-hole and the limit slots exposed to the offsetting hole.

In one of the embodiments of the present disclosure, the mounting base is provided with several identification parts which are provided around the keycap;the keycap's surrounding is provided with protruding guiding blocks.

In one of the embodiments of the present disclosure, the surface of the keycap facing the mounting base is provided with fastening parts which are provided at intervals with connecting rods;the fastening parts pass through the through-hole and are against the peripheral wall of the through-hole to make the keycap be provided on the mounting base in a dismountable way.

In one of the embodiments of the present disclosure, the external surface of the mounting base is sunken to form a containing groove, the through-hole is provided at the bottom of the containing groove;the keycap is contained in the containing groove partially at least.

In one of the embodiments of the present disclosure, the potentiometer is a slide-type potentiometer;

In one of the embodiments of the present disclosure, the resistance adjustment module connects to the primary coil of the transformer of the driving power supply.

The present disclosure also provides a lamp comprising the lamp body and the variable resistance power adjustment device, and the variable resistance power adjustment device is provided at one end of the lamp body.

In one of the embodiments of the present disclosure, the mounting base is made of translucent materials;the lamp is provided with a luminous lamp panel, the mounting base covers the luminous lamp panel;and/or, the lamp also comprises a wire conduit provided on the lamp body and connecting to the mounting cavity of the base;and/or, the lamp body comprises a lamp cap, a heat dissipation rack and several luminous modules, the lamp cap is provided with a driving power supply, the heat dissipation rack is provided on the lamp cap, the surrounding of the heat dissipation rack is provided with mounting slots, one the luminous module is provided in one the mounting slot and connects to the driving power supply of the lamp cap.

In the technical scheme of this present disclosure, the lamp body provided with a mounting base where the keycap and the resistance adjustment module are installed, so that the resistance adjustment module can change the value of resistance switched in the driving power supply of the lamp body and then the luminescence power of the lamp body is change. Wherein, the resistance adjustment module also comprises a knob-type potentiometer or a slide-type potentiometer, that is, the user can make the keycap slide in the through-hole to adjust the value of resistance switched in the driving power supply from the resistance adjustment module; or, the user can rotate the keycap to make the keycap rotate in the through-hole to adjust the value of resistance switched in the driving power supply from the resistance adjustment module. The variable resistance power adjustment device of present disclosure simplifies the power control mode of the lamp, reduces the power adjustment cost and improves the working stability of the lamp. In addition, the adjustment device is directly provided on the lamp body, so the power of the lamp body can be set before installation of the lamp body without being powered on. The adjustment process is simple, convenient and safe. The present disclosure is applicable for the unity of specifications of lamp bodies, so the user only needs to buy one product and adjusts the variable resistance power adjustment device during use to meet power demands in different lighting scenes.

DETAILED DESCRIPTION

Combined with the Attached Figure in the embodiments of the present disclosure, to clearly and completely describe the technical scheme of the embodiments of present disclosure. Obviously, only part of the embodiments of present disclosure (instead of all of the embodiment) are described here. Based on the embodiments of the present disclosure, all other embodiments acquired by the common technicians in this field without creative work, shall be in the protection scope of the present disclosure.

It should be noted that, if there is a directional indication (upper, lower, left, right, front, and rear, etc.) in the embodiments of the present disclosure, the directional indication is only used to explain the relative positional relationship, motion condition, etc. between the components in a particular position (as shown in the Attached Figure), and if the particular attitude is changed, the directional indication is changed accordingly.

In addition, if there are descriptions relating to “first”, “second” and the like in the embodiments of the present disclosure, such descriptions of “first”, “second” and the like are for descriptive purposes only and are not to be construed as indicating or implying their relative importance or implying an indication of the number of indicated technical features. As such, a feature that defines as “first”, “second” may explicitly or implicitly include at least one of that features. In addition, the “and/or” as stated in the whole text should be understood as there are three paralleled schemes where scheme A, or scheme B or scheme A and scheme B can be met at the same time (taking “A and/or B as an example”). In addition, the technical schemes of embodiments may be combined with each other, but must be available for common technicians in this field, and when the combination of the technical scheme is contradictory or impossible, it should be considered that the combination of the technical scheme does not exist and not fall within the scope of the present disclosure.

The present disclosure discloses a variable resistance power adjustment device. ReferenceFIG. 1is a schematic diagram showing the structure of an embodiment of the variable resistance power adjustment device of present disclosure; ReferenceFIG. 2is a schematic diagram showing the assembly structure of the variable resistance power adjustment device inFIG. 1; ReferenceFIG. 3is a schematic diagram showing the sectional structure of the variable resistance power adjustment device inFIG. 2; ReferenceFIG. 4is a partial enlarged FIG. of section A inFIG. 3; ReferenceFIG. 5is a schematic diagram showing the structure of another embodiment of the variable resistance power adjustment device of present disclosure; Refer toFIG. 6for the partial enlarged FIG. of section B inFIG. 5; ReferenceFIG. 7is a schematic diagram showing the sectional structure of the variable resistance power adjustment device inFIG. 5; ReferenceFIG. 8is a schematic diagram showing the assembly structure of the variable resistance power adjustment device inFIG. 5; ReferenceFIG. 9is a schematic diagram showing the structure of base inFIG. 5; ReferenceFIG. 10is the structural diagram of showing the structure of keycap of present disclosure; ReferenceFIG. 11is a schematic diagram showing the structure of a third embodiment of the variable resistance power adjustment device of present disclosure; ReferenceFIG. 12is a schematic diagram of the circuit module of the lamp of present disclosure; ReferenceFIG. 13is a brief schematic diagram of the circuit module inFIG. 12; ReferenceFIG. 14is a schematic diagram of the overall circuit of the circuit module inFIG. 13.

In the embodiments of the present disclosure, as shown inFIG. 1and in combination withFIG. 2,FIG. 3,FIG. 4,FIG. 5andFIG. 11, the variable resistance power adjustment device is used for adjusting the power of the lamp body4. The variable resistance power adjustment device compromises: mounting base1, keycap2and resistance adjustment module. Mounting base1is fixed to the lamp body4, working with the lamp body4to form a mounting cavity121in an enclosure way, mounting base1is provided with a through-hole122connecting to the mounting cavity121; the keycap2connects to the mounting base1flexibly and stretches into the through-hole122partially; resistance adjustment module is provided in the mounting cavity121, the adjustment part of the resistance adjustment module connects to the keycap2, and the resistance adjustment module connects to the driving power supply of the lamp body4electrically.

In the practical application of this embodiment, the user can make the keycap2rotate or slide to drive the adjustment part of the resistance adjustment module rotate or slide, so that the corresponding resistance can be switched in the driving power supply from the resistance adjustment module and the resistance adjustment module adjusts the power of the lamp body4. Wherein, the adjustment part of the resistance adjustment module refers to the flexible switch on the resistance adjustment module. For example, the resistance adjustment module comprises a knob-type potentiometer, and the adjustment part refers to the knob switch on the knob-type potentiometer. The knob switch connects to the keycap2, rotation of the keycap2will drive the knob switch to rotate, so that certain resistance is switched in the driving power supply of the lamp body4directly from the knob-type potentiometer.

Understandably, the through-hole122passes through two surfaces of the mounting base1, and the through-hole122can be a circular or rectangular hole. When the through-hole122is a circular hole, the resistance adjustment module can comprise a knob-type potentiometer, the keycap2connects to the adjustment part of the knob-type potentiometer, the keycap2rotates in the through-hole122to adjust the value of resistance switched in the driving power supply from the knob-type potentiometer, so that the luminescence power of the lamp body4is adjusted; When the through-hole122is a circular hole, the resistance adjustment module can comprise a slide-type potentiometer3, the keycap2connects to the adjustment part of the knob-type potentiometer, the keycap2rotates in the through-hole122to adjust the value of resistance switched in the driving power supply from the knob-type potentiometer, so that the luminescence power of the lamp body4is adjusted.

In the embodiments of utility mode, the lamp body4provided with a mounting base1where the keycap2and the resistance adjustment module are installed, so that the resistance adjustment module can change the value of resistance switched in the driving power supply of the lamp body4and then the luminescence power of the lamp body is changed. Wherein, the resistance adjustment module also comprises knob-type potentiometer or a slide-type potentiometer3, that is, the user can make the keycap2slide in the through-hole122to adjust the value of resistance switched in the driving power supply from the resistance adjustment module; or, the user can rotate keycap2to make it rotate in the through-hole122to adjust the value of resistance switched in the driving power supply from the resistance adjustment module. The variable resistance power adjustment device of present disclosure simplifies the power control mode of the lamp and improves the working stability of the lamp.

In the practical application of this embodiment, in combination withFIG. 4, the mounting base1can be provided on lamp body4in a clamping way; or the mounting base1can be fixed to the lamp body4with screws. Wherein, when the mounting base1is installed to the lamp body4, there is a space between the partial area of the mounting base1and the lamp body4, forming the mounting cavity121; in other words, the mounting base1can be a plane structure, the lamp body4is provided with a concave slot, when the mounting base1is installed to the lamp body4, the mounting base1covers the concave slot to form the mounting cavity121; or, the mounting base1is provided with a concave slot, the surface of the lamp body4facing the mounting base1can be a plane structure, when the mounting base1is installed to the lamp body4, the mounting base1works and the lamp body4form the mounting cavity121in an enclosure way.

Based on the afore the contents, the mounting base1works and the lamp body4to form the mounting cavity121in an enclosure way, and to facilitate installation of the keycap2, the through-hole122is provided correspondingly to the mounting cavity121; in other words, the through-hole122passes through the opposite two surfaces of the mounting base1, so that the resistance adjustment module is provided in the mounting cavity121and is exposed to the through-hole122partially, the keycap2can pass through the through-hole122, and the part of the keycap2passing through the through-hole122connects to the adjustment part of the resistance adjustment module.

In the practical application of this embodiment, in combination withFIG. 4, the keycap2connects to the mounting base1flexibly, which means that: the surface of the keycap2facing the mounting base1is provided with a protruding fastening part24, the fastening part24of the keycap2passes through the through-hole122, so that the fastening part24fits the button stand on the internal wall of the keycap2and the keycap2can rotate or slide in the through-hole122; or the periphery of the keycap2is provided with protruding parts, the mounting base1is provided with limit slots125, and protruding parts can be provided in the limit slots125in a slide way.

In one of the embodiments of the present disclosure, the resistance adjustment module comprises a fixed resistor and potentiometer3, fixed resistor and potentiometer3are switched in the driving power supply of the lamp body4in series, and the adjustment part of potentiometer3connects to the keycap2. Understandably, when the value of resistance switched in the driving power supply from the potentiometer3is 0, only the fixed resistor is switched in the driving power supply to adjust the current passing through the fixed resistor and the potentiometer3, and, in such a way, the fixed resistor and the potentiometer3serve as the component of adjusting the luminescence power of the lamp body4to improve the accuracy of the luminescence power of the lamp body4.

Understandably, in combination withFIG. 12,FIG. 13andFIG. 14, the fixed resistor and the potentiometer3connect in series as a whole. After the fixed resistor and the potentiometer3connect in series, they connect to the luminous module46of the lamp body4in parallel, i.e., the luminous module46connects to the fixed resistor and the potentiometer3in parallel and then is switched in the driving power supply.

Optionally, the fixed resistors resistance can be any numerical value. For example, the resistance of fixed resistor could be 5Ω, 10Ω, 15Ω, etc. Of course, the resistance of the fixed resistor can also be adjusted according to the actual industrial design.

Optionally, the resistance of the potentiometer3can be 0Ω-2 kΩ.

Optionally, the resistance of the potentiometer3can be 0Ω-2 kΩ. When the luminescence power of the lamp body4is adjustable, the potentiometer3with a corresponding resistance range can be replaced as needed.

In the practical application of this embodiment, the fixed resistor and the potentiometer3are connected in series and then are switched in the driving power supply of the lamp body4, so that the luminescence power of the luminous module46can be adjusted by using the fixed resistor and the potentiometer3to improve the corresponding precision of the resistance and adjustment parameter.

Specifically, for the afore the fixed resistor and the potentiometer3switched into the driving power supply, it can be understood as:

assuming that the resistance of the knob-type potentiometer is 0Ω-2 kΩ, the designed rated rotating angle range of the knob switch of the knob-type potentiometer is 0°-240°; wherein, when the adjustment angle of the knob switch of the knob-type potentiometer is 0° or 240°, the adjustment angle 0° is corresponding to 0Ω, and the adjustment angle 240° is corresponding to 2 kΩ, and, between 0°-240°, the value of resistance switched into the driving power supply gets bigger gradually.

In the practical application, when the knob-type potentiometer is applied to the driving power supply, not all the corresponding light adjustment effect between the adjustment range of 0° and 240° could be generated, but the light adjustment effect is good. Its working characteristics include: for the potentiometer within a low resistance range, the light adjustment sensitivity is too high, the power declines or rises too quickly, and flashing is likely to happen; within a high resistance range, the light adjustment sensitivity is too low, the power hardly changes when the resistance value is changed, and the luminance of the lamp is not obvious; within a middle resistance range, the light adjustment effect is good, and the power adjustment precision is high. For example: Usually, the adjustment angle of the knob switch of the knob-type potentiometer is 30°-210°, and its resistance value change within this range is suitable for power adjustment of the lamp body4. The user can rotate the keycap2to realize rotation of the knob switch of the knob-type potentiometer within 30°-210°;

However, in actual situations, the range of the power of the lamp body4to be adjusted is certain, such as 20%-100%. When the adjustment angle of the potentiometer3is 30°, if the rotation angle is small, the actual resistance change of the potentiometer3is small, the power changes too fast, the power adjustment sensitivity is too high, as a result, the power of the lamp body4does not maintain 20%, and the actual power may be 15%. Therefore, the potentiometer3is provided with a fixed resistor in series, so the cooperation between the fixed resistor and the potentiometer3makes the overall resistance maintain a medium resistance range, improving the power adjustment precision; in addition, through the setting of the specification of the fixed resistor, the power of the lamp is just 20% when the adjustment angle of the potentiometer3is 30°. Compared with the application of the single potentiometer3, the cooperation of the fixed resistor and the potentiometer3can improve the adjustment sensitivity.

So, the fixed resistor can work with the knob-type potentiometer to correct power. Through switching the fixed resistor (as a reference value) into the driving power supply, the potentiometer3with a small resistance value can be applied instead of a large resistance value, effectively reducing the production cost and improving the stability of the adjustment system.

In combination withFIG. 12,FIG. 13andFIG. 14, the variable resistance power adjustment device can be switched into the primary coil of the transformer of the driving power supply or the secondary coil of the transformer of the driving power supply. Wherein, the principle of the solution is explained by taking the switch of the variable resistance power adjustment device in the primary coil of the transformer of the driving power supply as an example. Specific contents are as follows:

In combination withFIG. 12andFIG. 13, when the resistance adjustment module connects to one end of the primary coil of the transformer of the driving power supply, it can be avoided that another resistance adjustment module set on the secondary coil of the transformer, achieving a simple circuit structure and lowering the cost. When the external power supply end is switched into the alternating current, after filtering by the rectifier, the primary coil and the secondary coil of the transformer convert voltage into that needed in working of the luminous module46, the alternating current is converted into the direct current needed in working of the luminous module46through the rectifying circuit, and there is a power control circuit between the filtering circuit of the driving power supply and the transformer to control the output power of the driving power supply. In other words, the potentiometer of the variable resistance power adjustment device connects to the adjustment interface of the power control circuit of the driving power supply.

In combination withFIG. 13andFIG. 14, U1 chip in this embodiment can be a regular chip. For example, Chip LZC8620. Specifically, the RN port of U1 chip connects to the potentiometer to coordinate with U1 chip to adjust the control mode of the primary coil of the transformer and then adjust the output power of the driving power supply.

In regular circuits, the power may be adjusted by connecting a thermistor to the driving power supply. In such a way, the control precision is low, and the power cannot be adjusted effectively. Or the driving power supply can be provided with several control circuits, but it will cause a high cost, and products are very complex and cannot be manufactured effectively. In this embodiment, by switching the resistance adjustment module in the driving power supply in this embodiment, the luminescence power of the lamp body can be controlled effectively, and the control precision is high.

As shown in the followingFIG. 14, this is a schematic diagram of the circuit of a complete embodiment. Wherein, TH2 is potentiometer3whose resistance is 0-2 KΩ; R35 is a fixed resistor (9.53 KΩ) connecting to TH2 in series and used for adjusting the minimum power of the lamp.

In one of the embodiments of the present disclosure, in combination with FIG.3,FIG. 4,FIG. 5,FIG. 6andFIG. 7, the potentiometer3is a knob-type potentiometer; the surface of the keycap2facing the mounting base1is provided with connecting rod21which passes through the through-hole122and connects to the knob-type potentiometer.

In this embodiment, the mounting wall is provided with a knob-type potentiometer inside, by which the mounting base1only needs to be provided with a rectangular or circular through-hole122, avoiding that the through-hole122covers a large area of the mounting base1and improving the external compactness of the variable resistance power adjustment device. In another aspect, the keycap2is used for rotating the knob-type potentiometer to adjust the resistance switched on the driving power supply, achieving high adjustment flexibility.

In one of the embodiments of the present disclosure, in combination withFIG. 2andFIG. 6, the external surface of the mounting base1is also provided with limit slot125which is provided around the through-hole122.

In combination withFIG. 10, the surface of the keycap2facing the mounting base1is provided with limit post23which is in parallel with connecting rod21, and limit post23can be provided in limit slot125in a slide way.

In this embodiment, the external surface of the mounting base1is also provided with limit slot125, the keycap2is provided with limit post23corresponding to limit slot125, limit post23can be provided in limit slot125in a slide way to limit rotation angles of the keycap2and avoid damage to the potentiometer3caused by excessive rotation of the keycap2.

In one of the embodiments of the present disclosure, in combination withFIG. 2andFIG. 6, the external surface of the mounting base1is also provided with several locating slots123which are set around the through-hole122in a circle, and several locating slots123and limit slot125are provided at intervals;

In combination withFIG. 10, the surface of the keycap2facing the mounting base1is provided with positioning column22which are in parallel with connecting rod21, and positioning column22can be provided in locating slots123in a slide way.

In this embodiment, the external surface is also provided with several locating slots123which are set around the through-hole122in a circle, the keycap2is provided with positioning column22corresponding to several locating slots123. Wherein the keycap2rotates, the locating post22moves from one locating slot123to another locating slot123. During this process, the internal wall of several locating slots123plays an impediment role in the motion of the locating post22, avoiding damage to the potentiometer3caused by too fast rotation of the keycap2.

Optionally, several locating slots123and limit slots125are provided around the through-hole122partially or wholly, several locating slots123and limit slots125are provided at intervals, i.e., the circumference of several locating slots123and that of limit slot125are set at intervals.

Understandably, in combination withFIG. 2andFIG. 6, the locating slots123can be slot formed through the sinking of the mounting base1. Or, the mounting base1can be provided with several locating bars124, and two adjacent locating bars124work to form locating slots123.

In one of the embodiments of the present disclosure, two adjacent the locating bars124provided at intervals to form locating slots123, in combination withFIG. 6,FIG. 7andFIG. 9, the surface of the mounting base1facing the keycap2is provided with several locating bars124which are provided in a radiation shape centering on the through-hole122.

In this embodiment, a structure characterized in that several locating bars124form several locating slots123are applied to enhance the thickness of locating slots123, so that the service life of the variable resistance power adjustment device can be improved.

In one of the embodiments of the present disclosure, limit slots125are provided in an arc shape, the angle between connection lines of two ends of limit slot125and the through-hole122is α, the rotating angle of the potentiometer3is β, and α≤β. In other words, the length of the limit slot125is no more than the stroke of rotation of the potentiometer3driven by the keycap2, avoiding damage to the potentiometer3.

In another aspect, the other important reason of α≤β is: regular potentiometers can hardly realize even light adjustment within it resistance adjustment range; in other words, for the potentiometer within a low resistance range, the light adjustment sensitivity is too high, flashing is likely to happen, and the performance is unstable; when the potentiometer is adjusted within a high resistance range, the light adjustment sensitivity is too low, the power hardly changes when the resistance value is changed, and the luminance of the lamp is not obvious; i.e., for the potentiometer within a medium resistance range, the light adjustment effect is good. So, the deficiency of the adjustment precision difference needs to be overcome through structural design of the adjustment device. By selecting a medium adjustment angle γ of the potentiometer with a certain light adjustment effect and making any in structure design, the potentiometer will be limited to rotating only within an angle range which can achieve a good light adjustment effect, ensuring that the light adjustment effect is good within the whole rotation range of the keycap.

In one of the embodiments of the present disclosure, in combination withFIG. 5,FIG. 6,FIG. 7,FIG. 8andFIG. 9, the mounting base1comprises the cover plate11and the base12. Wherein, the cover plate11is provided on the lamp body4, and the cover plate11is provided with offsetting hole111; The base12is provided on the lamp body4and works with the lamp body4to form a mounting cavity121in an enclosure way, the base12is provided corresponding to the offsetting hole111, the base12is provided with a through-hole122and limit slot125, and the through-hole122and the limit slot125is exposed to the offsetting hole111.

In this embodiment, there is a cover plate11and base12corresponding to the mounting base1. In other words, the cover plate11and the base12are independently provided, base12is provided on the lamp body4, and then the cover plate11covers the lamp body4, the cover plate11is provided with an offsetting hole111corresponding to the base12, so that the through-hole122on the base12and the limit slot125can be exposed to the offsetting hole111.

Optionally, the base12can be provided with several locating slots123.

Optionally, the cover plate can be provided with several locating slots123which are provided around the offsetting hole111.

In one of the embodiments of the present disclosure, in combination withFIG. 1, the mounting base1is provided with some identification part112which are provided around the keycap2; the periphery of the keycap2is provided with guiding block25.

In this embodiment, the mounting base1can be made of plastics, and the mounting base1is provided with identification part112. In other words, when the mounting base1is made of translucent plastics, identification part112can be provided on any surface of the mounting base1, and identification part112can be colored identifications. When the mounting base1is made of colored plastics, the surface of the mounting base1back on the lamp body4is provided with identification part112.

Optionally, identification part112could be the concave slot or convex part in a characteristic shape.

Optionally, the corresponding area of the identification part112can be coated with ink to form colored identification.

In one of the embodiments of the present disclosure, in combination withFIG. 10, the surface of the keycap2facing the mounting base1is provided with fastening part24, and fastening part24and connecting rod21is provided at intervals; Fastening part24passes through the through-hole122and is against the peripheral wall of the through-hole122, so that the keycap2is provided on the mounting base1in a dismountable way.

In this embodiment, fastening part24could be a snap spring whose one end connects to the mounting base1and the other end connects to the keycap2, so that the keycap2is provided on the mounting base1flexibly.

In one of the embodiments of the present disclosure, the surface of the keycap2facing the mounting base1is provided with several fastening part24. In other words, the keycap2is provided with two fastening parts24which is provided in the through-hole122, so that the fastening part24is against the internal wall of the through-hole122and the keycap2is located in the through-hole122.

Optionally, the keycap2can be provided with three and more fastening parts24which are provided around the connecting rod21.

In one of the embodiments of the present disclosure, the external surface of the mounting base1is sunken to form a containing groove113, and the through-hole122is provided at the bottom of the containing groove113; the keycap2is contained in the containing groove partially at least.

In this embodiment, the external surface of the mounting base1forms a containing groove113, and the keycap2is contained in the containing groove partially at least to reduce the height of the keycap2above the surface of the locating base, so that the appearance of the variable resistance power adjustment device is compact. In the meantime, the mounting base1can also hinder the clearance between the keycap2and the mounting base1partially, preventing dust from entering the clearance between the keycap2and the mounting base1.

In another embodiment of the present disclosure, in combination withFIG. 11, the potentiometer3is slide-type potentiometer3.

In one of the embodiments of the present disclosure, in combination withFIG. 12,FIG. 13andFIG. 14, the potentiometer3of the resistance adjustment module connects to the primary coil of the transformer of the driving power supply.

The present disclosure also puts forward a kind of lamp. As shown inFIG. 1andFIG. 11, the lamp includes the lamp body4and the resistance control device. The specific structure of the variable resistance power adjustment device refers to the above embodiment. Because the lamp adopts all technical schemes of all above embodiments, at least all the beneficial effects of the technical scheme of the above embodiment are obtained. It will not be repeated in unnecessary details here. Wherein, the variable resistance power adjustment device is provided at one end of the lamp body4.

In one of the embodiments of the present disclosure, the mounting base1is made of translucent materials, the lamp is provided with a luminous lamp panel41which is covered by the mounting base1. In this embodiment, the mounting base1is made of translucent materials, and a luminous lamp panel41is provided corresponding to the mounting base1to illuminate the area corresponding to the keycap2, so that the user can identify and operate the keycap2.

In one of the embodiments of the present disclosure, in combination withFIG. 8, the lamp also comprises a wire conduit42which is provided on the lamp body4and connects to the mounting cavity121of the base12.

In one of the embodiments of the present disclosure, in combination withFIG. 8, the lamp body4comprises a lamp cap43, a heat dissipation rack44and several luminous modules46, the lamp cap43is provided with driving power supply, the heat dissipation rack44is provided on the lamp cap43, the periphery of the heat dissipation rack44is provided with mounting slot45, and one luminous module46is provided in one mounting slot45and connects to the driving power supply of the lamp cap43electrically.

The description is only the preferred embodiment of the present disclosure, and it is not for this reason that the patent scope of the present disclosure is limited. Any equivalent structural transformation made by using the description of the present disclosure and the attached FIG., or direct/indirect application in other related technical fields under the inventive concept of the present disclosure, is included in the patent protection scope of the present disclosure.