CN209876820U - Lamp fixing device - Google Patents

Abstract

The utility model relates to a lamps and lanterns installation device technical field discloses a lamps and lanterns fixing device, including fixing base and connecting seat, the fixing base is including the first main part that is equipped with the lug, the connecting seat has the second main part that is equipped with and accepts the chamber, it is equipped with the mounting groove on the inner wall in chamber to accept, the mounting groove includes eaves wall and lateral wall, the both ends of eaves wall form respectively into second open end and spacing end, the spacing end of eaves wall and the bottom of accepting the chamber are connected to the lateral wall, the lug of fixing base can be followed the second open end and got into and rotatory to spacing end, still including can be connected fixed fastening structure with mounting groove and lug. Through setting up the mounting groove, the swivelling joint seat can be directly with the lug screw in or the fixing base of unscrewing, during dismouting lamps and lanterns, be in the ascending lug in the axial of the main application of force of both hands and be not in the atress on the ascending lug in the axial of the main application of force of both hands relatively even, and the operator only need overcome the frictional force between lug and the mounting groove, greatly reduced the degree of difficulty that the operator dismantled lamps and lanterns.

Description

Lamp fixing device

Technical Field

The utility model relates to a lamps and lanterns installation device technical field, in particular to lamps and lanterns fixing device.

Background

The lighting device needs to be mounted on the ceiling of a room using a lamp fixture. The prior lamp fixing device adopts a fixing seat and a connecting seat which are separated to fix the lamp, wherein the fixing seat is connected with a wall surface, the connecting seat is connected with the lamp, and the wall surface end and the lamp are fixed and electrically conducted through mechanical connection and electric connection between the fixing seat and the connecting seat.

In order to make the mechanical connection between the fixing seat and the connecting seat more stable, the conventional lamp fixing device needs to utilize the hooking part to keep the convex block in the mounting groove. However, when detaching the lamp fixing device, the user needs to push up the lamp and the connecting seat first to move the protruding blocks to the positions where the protruding blocks can be pulled out from the mounting groove, and only when the protruding blocks can be simultaneously screwed out of the mounting groove, the operator can detach the lamp by rotating the connecting seat in the opposite direction.

However, when the operator pushes up the lamp and the connecting seat, the force is mainly concentrated on the connecting wires of the contact parts of the two hands and the lamp, and the convex block deviating from the connecting wires is small in stress and displacement and difficult to unscrew from the mounting groove, so that the lamp is inconvenient to disassemble.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a solve above-mentioned technical problem and propose, aim at provides a lamps and lanterns fixing device, when guaranteeing installation stability, improves the convenience of dismantling.

Particularly, the utility model provides a lamp fixing device, including fixing base and connecting seat, the fixing base includes first main part, be equipped with two at least lugs that set up along the circumference of first main part on the first main part, the connecting seat has the second main part, the second main part is provided with the accepting chamber that is used for accepting the first main part, the accepting chamber has the first open end that supplies the first main part to enter, be equipped with two at least mounting grooves that set up along the inner wall circumference of accepting chamber on the inner wall of accepting chamber;

the mounting groove comprises an eave wall and a side wall, the side wall is connected with the limiting end of the eave wall and the bottom of the accommodating cavity, a second opening end and a limiting end of the mounting groove are formed at two ends of the eave wall respectively, and one surface of the eave wall, far away from the first opening end, is parallel to the plane where the first opening end is located;

the lug of the fixing seat can enter from the second opening end of the mounting groove and rotate to the limiting end of the mounting groove along the circumferential direction of the inner wall of the accommodating cavity.

The lamp fixing device further comprises a fastening structure, and the fastening structure can limit the position of the lug in the mounting groove.

Compared with the prior art, the utility model provides a lamps and lanterns fixing device, swivelling joint seat can be directly with lug screw in or screw out fixing base, during dismouting lamps and lanterns, be in the ascending lug of the axial of the main application of force of both hands and be not in the atress on the ascending lug of the axial of the main application of force of both hands relatively even, and the operator only need overcome the frictional force between lug and the mounting groove, greatly reduced the degree of difficulty that the operator dismantled lamps and lanterns.

In addition, preferably, the fastening structure includes a pin for fixing the projection in the mounting groove and a socket provided at the projection and/or the mounting groove.

According to this preferred scheme, after in the lug screw in mounting groove, insert the jack of lug and/or mounting groove department with the bolt, can fix lug and mounting groove, structural strength when improving connecting seat and fixing base and being connected, the installation of lamps and lanterns is reliable and stable.

Further, as an optimization, the bolt is detachably disposed near the second opening end of the mounting groove, and when the protruding block enters the mounting groove, the bolt can move into the mounting groove to limit the protruding block from sliding out.

In addition, preferably, the bolt is a threaded column, and the bolt is in threaded connection with the protruding block and the mounting groove.

According to the preferred scheme, the bolt is respectively in threaded connection with the lug and slides, the connection mode between the bolt and the lug and between the bolt and the mounting groove is simple, and the connection is reliable.

Further, as a preferred option, one end of the plug is an insertion end, the insertion end is configured as an expandable and contractible limit structure, and the size of the limit structure satisfies:

the outer diameter of the limiting structure in a contraction state is not larger than the inner diameter of the jack;

the outer diameter of the limiting structure in the expanded state is larger than the inner diameter of the jack.

According to the preferred scheme, when the bolt dismounting convex block and the mounting groove are required to be used, the limiting structure is in a contraction state, so that the bolt can be conveniently inserted or pulled out. And when bolt fixed connection lug and mounting groove, limit structure is under the expansion state, and the limit structure who is greater than the jack internal diameter makes the lug be difficult for following the jack roll-off, the connection dynamics when improving bolt connection lug and mounting groove.

Preferably, the outer diameter of the stopper structure in the expanded state is gradually reduced along a direction in which the connecting base extends toward the fixing base.

According to the preferred scheme, the inserting end of the plug can be easily aligned to the jack without external force, so that the plug can be conveniently inserted into the jack, and an operator can conveniently install the lamp.

Preferably, the eaves wall has a screw-in portion which is a slope extending towards a plane of the first open end adjacent to the second open end.

According to this preferred scheme, the setting of screw in portion has improved the bore of the first open end of mounting groove to make things convenient for the lug to enter into first open end, and then make things convenient for in the lug screw in mounting groove.

In addition, as preferred, the lug with the mounting groove all is rotational symmetry and distributes, the fixing base is in the rotation center department of lug is provided with first electric connecting portion, the connecting seat is in the rotation center department of mounting groove is provided with second electric connecting portion, first electric connecting portion, second electric connecting portion can realize electrical connection.

According to the preferred embodiment, the first and second electrical connection parts are positioned so as not to be affected by the rotation of the projection in the mounting groove, and the first and second electrical connection parts can still maintain electrical connection during the rotation.

In addition, preferably, the first electrical connection part comprises a first accommodating groove, a second accommodating groove and a third accommodating groove which are concentrically arranged from outside to inside, and the second electrical connection part comprises a first conductive terminal, a second conductive terminal and a third conductive terminal which are sequentially distributed from outside to inside;

when the lug is connected with the mounting groove, the first conductive terminal, the second conductive terminal and the third conductive terminal are respectively accommodated in the first accommodating groove, the second accommodating groove and the third accommodating groove.

According to the preferred embodiment, by the arrangement of the annular electrical connection, the contact areas between the first receiving groove, the second receiving groove and the third receiving groove and the first conductive terminal, the second conductive terminal and the third conductive terminal are increased, so that the first electrical connection part and the second electrical connection part can be electrically connected in any relative rotation positioning direction, and the first conductive terminal, the second conductive terminal and the third conductive terminal are completely insulated at intervals by the first insulation part, the second insulation part and the third insulation part, so that the safety of power utilization is improved.

Preferably, the number of the insertion holes on the projection and/or the mounting groove is multiple, and the number of the pins is the same as that of the insertion holes.

According to this preferred scheme, a plurality of jacks are inserted to a plurality of bolts, have increased the tie point when lug and mounting groove are connected, improve the dynamics of being connected of lug and mounting groove, and then increase the structural strength when connecting seat is connected with the fixing base.

Drawings

Fig. 1 is a schematic structural view of a fixing base in an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a connecting seat according to an embodiment of the present invention;

FIG. 3 is a cross-sectional view of the second body portion of FIG. 2 taken along line C-C;

FIG. 4 is a schematic structural view of a flange mounting portion and a sliding block in an embodiment of the present invention;

fig. 5 is a schematic structural diagram of the plug according to the embodiment of the present invention.

Description of reference numerals:

1. a fixed seat; 10. a first main body portion; 11. a bump; 12. a first electrical connection; 121. a first receiving groove; 122. a second receiving groove; 123. a third accommodating groove; 13. a flange mounting portion; 131. connecting holes; 2. a connecting seat; 20. a second main body portion; 201. an accommodating cavity; 202. a first open end; 21. mounting grooves; 211. a second open end; 212. a limiting end; 21a, eave wall; 21b, side walls; 21c, a screw-in part; A. screwing into the space; B. a fixed space; 22. a second electrical connection; 221. a first conductive terminal; 222. a second conductive terminal; 223. a third conductive terminal; 30. a fastening structure; 3. a bolt; 31. a jack; 3a, an insertion end; 4. a sliding block; 41. a threaded hole; 5. a limiting structure; 51. a telescopic groove; 52. a barb; 53. an elastic member.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings. The structure and the like of the luminaire fixture are schematically shown in a simplified manner in the figures.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

The utility model discloses an embodiment provides a lamps and lanterns fixing device, it is shown with fig. 1-3 to see for on installing the base member of roof or ceiling class with lamps and lanterns, including the fixing base 1 and the connecting seat 2 of mutually supporting, fixing base 1 is used for being connected with the base member, and connecting seat 2 is used for being connected with lamps and lanterns. Of course, in other embodiments, the connection seat 2 may be integrally provided with the lamp. The fixing seat 1 has a first main body portion 10, a first combining portion is arranged on the first main body portion 10, the connecting seat 2 has a second main body portion 20, the second main body portion 20 is provided with an accommodating cavity 201 for accommodating the first combining portion, and the accommodating cavity 201 has a radial flaring portion which is a first opening end 202 for the first main body portion 10 to butt into. Specifically, the first coupling portion includes at least two protrusions 11 disposed along the circumferential direction of the first body portion 10, at least two mounting grooves 21 disposed along the circumferential direction of the inner wall of the accommodating cavity 201 are disposed on the inner wall of the accommodating cavity 201, and the protrusions 11 of the fixing base 1 can enter from the second opening end 211 of the mounting grooves 21 and rotate along the circumferential direction of the inner wall of the accommodating cavity 201 to the limit end 212 of the mounting grooves 21.

The convex blocks 11 and the mounting grooves 21 are provided with a plurality of convex blocks 11 and a plurality of mounting grooves 21 which are distributed in a rotational symmetry manner. The fixing base 1 is provided with a first electrical connection portion 12 at a rotation center of the bump 11, the connecting base 2 is provided with a second electrical connection portion 22 at a rotation center of the mounting groove 21, and the first electrical connection portion 12 and the second electrical connection portion 22 can be electrically connected. The first electrical connection part 12 and the second electrical connection part 22 are positioned so that they are not affected by the rotation of the protrusion 11 in the mounting groove 21, and the first electrical connection part 12 and the second electrical connection part 22 can still maintain electrical connection during the rotation.

As shown in fig. 2 and 3, the mounting groove 21 includes a brim wall 21a and a side wall 21b, and is disposed along the circumferential direction of the inner wall of the accommodating cavity 201, the end of the brim wall 21a connected to the side wall 21b is the above-mentioned limiting end 212, the end of the brim wall 21a away from the side wall 21b is the above-mentioned second opening end 211, and the side wall 21b connects the limiting end 212 of the brim wall 21a to the bottom of the accommodating cavity 201. The face of the eaves wall 21a remote from the first open end 211 is parallel to the plane of the first open end 211. A screwing space a capable of accommodating the projection 11 is formed between the side wall 21B of the adjacent mounting groove 21 and the bottom of the housing chamber 201, and a fixed space B capable of accommodating the projection 11 is formed between the eaves wall 21a, the side wall 21B and the bottom of the housing chamber 201. Preferably, the bottom of the containing cavity 201 at the orthographic projection of the eaves wall 21a is hollowed, that is, is provided with an opening, so that the bump 11 can be screwed into the mounting groove 21 and connected with the mounting groove 21. For convenience of understanding the rotation direction of the connector holder 2, an arrow indicating the rotation direction is provided on an end surface of the first body portion 10 facing the connector holder 2.

Compared with the prior art, the utility model provides a lamp fixing device, through setting up mounting groove 21, swivelling joint seat 2 can be directly with lug 11 screw in or screw out fixing base 1, during the dismouting lamps and lanterns, be in the axial on lug 11 of the main application of force of both hands and the atress on the axial on lug 11 of the main application of force that is not in both hands is even relatively, and the operator only need overcome the frictional force between lug 11 and the mounting groove 21, greatly reduced the degree of difficulty that the operator dismantled lamps and lanterns. When the lamp is disassembled, the gravity of the lamp and the elastic force of the elastic element do not need to be overcome by pushing upwards, and only the friction force between the convex block 11 and the mounting groove 21 needs to be overcome, so that even an operator such as a woman or a child can simply and quickly disassemble the lamp.

It should be noted that, in the present invention, the "eaves wall" refers to a side wall of the mounting groove for receiving the weight of the lamp after the installation is completed, and does not limit the shape of the side wall.

Preferably, referring to fig. 1 and 2, the first electrical connection portion 12 includes a first receiving groove 121, a second receiving groove 122, and a third receiving groove 123 concentrically arranged from outside to inside, and an L electrode, an N electrode, and a ground electrode (the electrodes are located at the bottoms of the receiving grooves, which are not labeled in the figures for simplicity), respectively, disposed at the bottoms of the first receiving groove 121, the second receiving groove 122, and the third receiving groove 123, and the second electrical connection portion 22 includes a first conductive terminal 221, a second conductive terminal 222, and a third conductive terminal 223 sequentially distributed from outside to inside. After the bump 11 is screwed into the mounting groove 21, the first conductive terminal 221, the second conductive terminal 222 and the third conductive terminal 223 are respectively accommodated in the first accommodating groove 121, the second accommodating groove 122 and the third accommodating groove 123 and electrically connected to the L electrode, the N electrode and the ground electrode at the bottom of the accommodating grooves. By providing such annular electrical connection, the contact areas between the first, second, and third receiving grooves 121, 122, 123 and the first, second, and third conductive terminals 221, 222, 223 are increased, so that the first electrical connection portion 12 and the second electrical connection portion 22 can be electrically connected in any relative rotational positioning direction, and the safety of power consumption is improved.

Specifically, when the lamp needs to be installed on a substrate such as a roof or a ceiling, an operator only needs to push up the connecting base 2 to make the receiving cavity 201 of the second main body portion 20 in the connecting base 2 receive the first coupling portion of the fixing base 1, and then only by axially rotating the connecting base 2, the mechanical connection between the first coupling portion and the second coupling portion and the electrical connection between the first electrical connection portion 12 and the second electrical connection portion 22, that is, the mechanical connection and the electrical connection between the connecting base 2 and the fixing base 1, can be simultaneously achieved. Wherein the term "axial direction" used in the preferred embodiment of the present invention refers to the axial direction of the holder 1. The term "push-up" used in the preferred embodiment of the present invention means to push the coupling socket 2 in the axial direction towards the direction close to the fixing seat 1 or to push the coupling socket 2 in the axial direction towards the direction in which the relative distance between the coupling socket 2 and the fixing seat 1 decreases.

Referring to fig. 1 and 2, the lamp fixing device further includes a fastening structure 30 for fixing the protrusion 11 in the mounting groove 21. Specifically, the fastening structure 30 includes the insert pin 3 and the insertion hole 31 provided at the projection 11 and/or the mounting groove 21. Preferably, the insertion holes 31 are opened in both the protrusion 11 and the eaves wall 21a of the mounting groove 21. After the projection 11 is screwed into the mounting groove 21, the bolt 3 is inserted into the eaves wall 21a and the insertion hole 31 of the projection 11 in sequence, so as to fix the projection 11 and the mounting groove 21. Use bolt 3 can consolidate the mechanical connection intensity between connecting seat 2 and the fixing base 1, avoid connecting seat 2 slippage from fixing base 1, improve lamps and lanterns fixing device's structural strength. The utility model discloses use bolt 3 to replace elastic element in order to exert axial effort between fixing base 1 and connecting seat 2, need not to overcome the increasingly big compression restoring force of elastic element when dismantling lamps and lanterns, it is poor to have reduced the ascending lug 11 of the axial of the main application of force that is in both hands and not be in the ascending lug 11 of the axial of the main application of force of both hands, further reduces the degree of difficulty that the lamps and lanterns were dismantled to the operator.

Preferably, the bolt 3 is a threaded column, and the bolt 3 is connected with the projection 11 and the mounting groove 21 through threads. After the arrangement, the bolt 3 can be connected with the lug 11 and the mounting groove 21 through threads, and the connection mode is simple and reliable.

Referring to fig. 3, the eaves wall 21a has a screw-in portion 21c, and the screw-in portion 21c is a slope extending toward the plane of the first open end 202 adjacent to the second open end 211, that is, the diameter of the eaves wall 21a along the stopper end 212 toward the second open end 211 becomes larger. The arrangement of the screwing part 21c enlarges the caliber of the first opening end 202 of the mounting groove 21 during mounting, thereby facilitating the protrusion 11 to enter the first opening end 202 and further facilitating the protrusion 11 to be screwed into the mounting groove 21.

The convex block 11 and/or the insertion hole 31 on the mounting groove 21 are provided with a plurality of insertion holes, and the number of the inserted pins 3 is the same as that of the insertion holes 31. After the lamps and lanterns installation is accomplished, a plurality of bolt 3 inserts a plurality of jacks 31, has increased the tie point when lug 11 is connected with mounting groove 21, improves lug 11 and mounting groove 21's joint strength, and then increases the structural strength when connecting seat 2 is connected with fixing base 1.

Referring to fig. 1, the first body portion 10 is formed with a flange mounting portion 13 formed to project outward from an end edge of one end thereof for contact with a base, and the holder 1 is connected to a base such as a roof or a ceiling through the flange mounting portion 13. Specifically, the flange mounting portion 13 has a connection hole 131, preferably a screw hole, which is capable of being screwed to a roof or a ceiling. The preset wires on the roof or the ceiling are respectively stripped, the stripping length is preferably 8-10 mm, then the switch buttons corresponding to the electrodes on the fixing seat 1 are pressed, the corresponding wires are respectively inserted, and then the fixing seat 1 is screwed with the roof or the ceiling through the connecting holes 131 on the flange mounting part 13, so that the fixing seat 1 can be fixed on the roof or the ceiling.

Referring to fig. 3, in the expanded embodiment of the present invention, the plug pin 3 is detachably disposed near the second open end 211 of the mounting groove 21, and the plug pin 3 can be inserted into and pulled out from the position near the second open end 211 to fix or release the protrusion 11 and the mounting groove 21.

Preferably, in an expanded example of the present embodiment, as shown in fig. 4, the insertion hole 31 formed in the eaves wall 21a is a waist-shaped hole, a length direction of the insertion hole is consistent with a movement direction of the protrusion 11, a sliding block 4 is disposed in the waist-shaped hole, the sliding block 4 can slide along the length direction of the waist-shaped insertion hole 31, a threaded hole 41 is formed in a middle position of the sliding block 4, and the plug pin 3 is in threaded connection with the sliding block 4.

One end of the bolt 3 is an insertion end 3a, the insertion end 3a is configured to be an expandable and contractible limiting structure 5, and the size of the limiting structure 5 satisfies the following conditions: the outer diameter of the limiting structure 5 in the contraction state is not larger than the inner diameter of the insertion hole 31; the outer diameter of the spacing structure 5 in the expanded state is larger than the inner diameter of the insertion hole 31. When the bolt 3 is needed to disassemble and assemble the convex block 11 and the installation groove 21, the limiting structure 5 is in a contraction state, so that the bolt 3 can be conveniently inserted or pulled out. And when 3 fixed connection lugs 11 and mounting groove 21 of bolt, limit structure 5 is under the expansion state, and limit structure 5 that is greater than the jack 31 internal diameter makes lug 11 be difficult for following jack 31 roll-off, improves the connection dynamics when 3 connection lugs 11 of bolt and mounting groove 21.

In the present embodiment, referring to fig. 5, the limiting structure 5 specifically includes a telescopic slot 51 opened at the insertion end 3a of the latch 3, a barb 52, and an elastic member 53 connecting the latch 3 and the barb 52, the elastic member 53 being disposed in the telescopic slot 51. When the elastic member 53 is in a balanced state, the barb 52 protrudes from the latch 3, and when the barb 52 is pressed by an external force (e.g., the pressing of the insertion hole 31), the barb 52 moves toward the inside of the expansion groove 51, and the elastic member 53 is in a compressed state.

In addition, the outer diameter of the limiting structure 5 in the expanded state is gradually reduced along the direction that the connecting seat 2 extends towards the fixing seat 1. The insertion end 3a of the plug 3 can be relatively easily aligned with the insertion hole 31 and inserted without an external force, thereby facilitating the operation of an operator.

The utility model discloses an among other embodiments, the space between wall and the lamps and lanterns is comparatively narrow and small, and installer is difficult to carry out the plug operation to bolt 3 in this narrow and small space, and technical staff also can control the state switch of bolt 3 through the control assembly with 3 complex of bolt to in narrow and small space, accomplish the plug operation of bolt 3.

It will be appreciated by those of ordinary skill in the art that in the embodiments described above, numerous technical details are set forth in order to provide a better understanding of the present application. However, the technical solutions claimed in the claims of the present application can be basically implemented without these technical details and various changes and modifications based on the above-described embodiments. Accordingly, in actual practice, various changes in form and detail may be made to the above-described embodiments without departing from the spirit and scope of the invention.

Claims (10)

1. A lamp fixing device comprises a fixing seat and a connecting seat, wherein the fixing seat comprises a first main body part, the first main body part is provided with at least two convex blocks arranged along the circumferential direction of the first main body part, the connecting seat is provided with a second main body part, the second main body part is provided with an accommodating cavity used for accommodating the first main body part, the accommodating cavity is provided with a first opening end for the first main body part to enter, the inner wall of the accommodating cavity is provided with at least two mounting grooves arranged along the circumferential direction of the inner wall of the accommodating cavity, and the lamp fixing device is characterized in that,

the mounting groove comprises an eave wall and a side wall, a second opening end and a limiting end of the mounting groove are formed at two ends of the eave wall respectively, the side wall is connected with the limiting end of the eave wall and the bottom of the accommodating cavity, and one surface of the eave wall, which is far away from the first opening end, is parallel to the plane where the first opening end is located;

the lug of the fixing seat can enter from the second opening end of the mounting groove and rotate to the limiting end of the mounting groove along the circumferential direction of the inner wall of the accommodating cavity;

the lamp fixing device further comprises a fastening structure, and the fastening structure can limit the position of the lug in the mounting groove.

2. The luminaire-securing device of claim 1, wherein the fastening structure is a pin for securing the boss within the mounting slot and a socket provided at the boss and/or the mounting slot.

3. A light fixture as recited in claim 2, wherein said pin is removably disposed proximate said second open end of said mounting slot, said pin being movable into said mounting slot to limit sliding of said tab when said tab is received in said mounting slot.

4. The lamp fixture device of claim 3, wherein the pin is a threaded post, and the pin is threadedly connected to the protrusion and the mounting groove.

5. The luminaire fixture of claim 2 wherein one end of the plug is an insertion end configured as an expandable and contractible limit structure sized to:

the outer diameter of the limiting structure in a contraction state is not larger than the inner diameter of the jack;

the outer diameter of the limiting structure in the expanded state is larger than the inner diameter of the jack.

6. The luminaire fixture device of claim 5, wherein the outer diameter of the position limiting structure in the expanded state gradually decreases along the direction that the connecting seat extends towards the fixed seat.

7. A light fixture as recited in any one of claims 1-6, wherein the eaves wall has a screw-in portion that is a ramp extending adjacent the second open end and toward a plane of the first open end.

8. A lamp fixture device according to any one of claims 1-6 wherein the protrusion and the mounting slot are rotationally symmetric, the fixing base is provided with a first electrical connection at a rotational center of the protrusion, the connecting base is provided with a second electrical connection at a rotational center of the mounting slot, and the first electrical connection and the second electrical connection are electrically connectable.

9. The lamp fixture device of claim 8, wherein the first electrical connection portion comprises a first receiving slot, a second receiving slot and a third receiving slot concentrically arranged from outside to inside, and the second electrical connection portion comprises a first conductive terminal, a second conductive terminal and a third conductive terminal sequentially arranged from outside to inside;

when the lug is connected with the mounting groove, the first conductive terminal, the second conductive terminal and the third conductive terminal are respectively accommodated in the first accommodating groove, the second accommodating groove and the third accommodating groove.

10. A light fixture according to any one of claims 2, 3 or 5 wherein there are a plurality of said sockets on said projection and/or said mounting slot, and the number of said pins is the same as the number of said sockets.