CN100458279C - Ceiling embedded illuminating apparatus - Google Patents

Abstract

The invention relates to a ceiling-embedded lighting appliance, and aims to provide a ceiling-embedded lighting appliance (11) capable of reducing adverse thermal influence between a lighting device (42) and a lamp tube (12). In the present invention, a square ring-shaped lamp tube (12) is arranged around the opening (26) provided at the central part of the appliance body (21). Between the opening (26) of the side appliance body (12) and the inside of the side (13) other than the side (13) of the lamp holder (16) with the lamp tube (12), it does not overlap with the lamp tube (12) in the vertical direction The position is provided with lighting device (42). The invention can reduce the adverse thermal influence between the lighting device (42) and the lamp tube (12).

Description

Ceiling recessed lighting fixtures

technical field

The invention relates to a lighting appliance, in particular to a ceiling-embedded lighting appliance embedded in a ceiling.

Background technique

Conventionally known ceiling-embedded lighting fixtures that are built into the ceiling include, for example, ceiling-embedded lighting fixtures that are installed in a system ceiling assembled in a grid shape using T-shaped joist members.

The structure of this type of ceiling-embedded lighting fixture used in the ceiling of the system is a square frame surrounded by a plurality of fixture bodies with straight fluorescent tubes in sequence. In the central part of the inside of these fixture bodies, there is an opening that is more than one-third the size of the entire ceiling-embedded lighting fixture. Therefore, this opening can be used during construction, so that the installation of the fixture on the system ceiling and the installation of the fixture The construction of the power line wiring operation is more convenient.

Since the ceiling-mounted lighting fixture for the system ceiling has a large opening in the center, the installation place of the lighting device for lighting the fluorescent tube is limited, and in many cases it is installed above the fluorescent tube and overlaps it. position (for example, refer to Patent Document 1).

[Patent Document 1] Japanese Patent Application Laid-Open No. 1-232604 (pages 2-3, pages 3-7)

As described above, since the ceiling-mounted lighting fixture for the system ceiling has a large opening in the center, the installation place of the lighting device is limited. Under such circumstances, when the fluorescent tube is lit, the lighting device is affected by the heat of the fluorescent tube, which shortens the life of the lighting device, and the heat effect of the lighting device increases the humidity of the wall of the fluorescent tube, reducing the efficiency of the fluorescent tube, etc. The problem caused by the adverse thermal influence between the lighting device and the fluorescent tube.

In view of the defects of the above-mentioned existing ceiling embedded lighting fixtures, the inventor actively researches and innovates based on years of rich practical experience and professional knowledge engaged in the design and manufacture of such products, and cooperates with the application of academic theories, in order to create a new type The ceiling-embedded lighting fixture of the structure can improve the general existing ceiling-embedded lighting fixtures and make them more practical. Through continuous research, design, and after repeated trial samples and improvements, the present invention with practical value is finally created.

Contents of the invention

The object of the present invention is to overcome the defects of the existing ceiling-embedded lighting fixtures, and provide a new ceiling-embedded lighting fixture that can reduce the adverse thermal influence between the lighting device and the lamp tube, so that it is more suitable for practical.

Compared with the prior art, the present invention has obvious advantages and beneficial effects. It can be known from the above technical solutions that, in order to achieve the above-mentioned purpose of the invention, the present invention proposes a ceiling-embedded lighting fixture, which has a fixture body with an opening formed in the central part, a polygonal ring-shaped lamp tube arranged around the opening, and a lighting fixture set on the A lighting device at a position where the opening of the appliance body and the lamp tube do not overlap with the lamp tube in the vertical direction.

Since the lighting device is disposed between the opening of the appliance body and the lamp tube at a position that does not overlap the lamp tube in the vertical direction, adverse thermal influence between the lighting device and the lamp tube can be reduced.

The present invention also proposes a ceiling-embedded lighting fixture, which has a fixture body with an opening formed in the central part, a polygonal ring-shaped lamp tube with a lamp cap on one side provided around the opening, and an opening provided in the fixture body. A lighting device that does not overlap with the up and down direction of the lamp tube between any side except the side with the lamp cap.

Since the lighting device is arranged at a position that does not overlap with the lamp tube in the vertical direction between the opening of the appliance body and any side other than the side with the lamp cap, the adverse thermal influence between the lighting device and the lamp tube can be reduced, for example When the coldest part exists near the cap of the lamp tube, the temperature of the coldest part will be prevented from rising due to the heat of the lighting device.

The present invention also proposes a ceiling-embedded lighting fixture, which has a fixture body with an opening formed in the center and a polygonal ring-shaped lamp tube arranged around the opening, and is installed between the opening of the fixture body and the lamp tube. The edge of the opening that overlaps with the lamp tube in the up and down direction is provided with a power input side at one end along the edge of the opening and a lighting device with a lamp output side at the other end, and is installed on the power input side of the lighting device. A power terminal block at the edge of the opening of the appliance body, and a lamp socket installed at the edge of the opening of the appliance body on the lamp output side of the lighting device.

Since the lighting device is disposed between the opening of the appliance body and the lamp tube at a position that does not overlap the lamp tube in the vertical direction, adverse thermal influence between the lighting device and the lamp tube can be reduced. In addition, since the edge of the opening of the appliance body is provided with a lighting device on the power input side along one end of the edge of the opening of the appliance body and at the other end on the lamp output side, the power input side of the lighting device The power terminal block and the lamp socket are installed on the lamp output side of the lighting device, so the power terminal block and the lamp socket can be set separately, which can reduce the impact of noise.

In the aforementioned ceiling-embedded lighting fixture, the power supply terminal block is further provided with a power cord insertion hole facing inward of the opening of the fixture main body.

Since the power cord insertion hole of the power terminal block faces inwardly of the opening of the appliance body, the power cord can be easily inserted and connected to the power cord insertion hole of the power terminal block from the side of the opening.

The above-mentioned ceiling-embedded luminaire further has a ceiling-attached equipment mounting body which is installed in the central part of the fixture body, covers the opening of the fixture body, the lighting device, and has a lamp tube around it.

Since the ceiling accessory installation body covering the opening of the appliance body, the lighting device, and the lamp tube is installed in the central part of the appliance body, the installation of the ceiling accessory device can effectively use the inner space of the lamp tube.

It can be seen from the above technical solution that the present invention has the following advantages:

1. In the above-mentioned ceiling-embedded lighting fixture, since the lighting device is arranged between the opening of the appliance body and the lamp tube at a position that does not overlap the lamp tube in the vertical direction, it is possible to reduce the bad heat between the lighting device and the lamp tube. Influence.

In the aforementioned ceiling-embedded lighting fixture, since the lighting device is arranged between the opening of the fixture body and any side except the side with the lamp cap, it is possible to reduce the adverse thermal influence between the lighting device and the lamp tube, for example When the coldest part exists near the cap of the lamp tube, the temperature of the coldest part will be prevented from rising due to the heat of the lighting device.

2. In the above-mentioned ceiling-embedded lighting fixture, since the lighting device is arranged between the opening of the appliance body and the lamp tube at a position that does not overlap the lamp tube in the vertical direction, it is possible to reduce the bad heat between the lighting device and the lamp tube. Influence. In addition, since the edge of the opening of the appliance body is provided with a lighting device on the power input side at one end of the edge of the opening of the appliance body and at the other end on the output side of the lamp tube, the power input side of the lighting device The power terminal block and the lamp socket are installed on the lamp output side of the lighting device, so the power terminal block and the lamp socket can be set separately, which can reduce the impact of noise.

3. In addition to the effects of the aforementioned ceiling-embedded lighting fixtures, since the power cord insertion hole of the power terminal block faces inward of the opening of the fixture body, it is convenient to insert and connect the power cord to the power supply from the side of the opening. The power cord insertion hole of the terminal block.

4. In addition to the effects of the aforementioned ceiling-embedded lighting fixtures, since the opening covering the fixture body and the lighting device are installed in the central part of the fixture body, and the ceiling accessory equipment installation body with lamp tubes around it is installed, the installation of the ceiling accessory equipment The inner space of the lamp tube can be effectively utilized.

The above description is only an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention, it can be implemented according to the contents of the description, and in order to make the above and other purposes, features and advantages of the present invention more obvious and understandable , the following preferred embodiments are specifically cited below, and are described in detail as follows in conjunction with the accompanying drawings.

Description of drawings

Fig. 1 is a sectional bottom view showing a ceiling-attached equipment mounting body of a ceiling-embedded lighting fixture according to a first embodiment of the present invention.

2 is an enlarged cross-sectional view of the above-mentioned ceiling-embedded lighting fixture, (a) is a cross-sectional view along line A-A of FIG. 1 , and (b) is a cross-sectional view along line B-B of FIG. 1 .

Fig. 3 is a bottom view of the assembled state of the ceiling-embedded lighting fixture described above.

4 is a partially omitted cross-sectional view showing a ceiling-embedded lighting fixture according to a second embodiment of the present invention.

Fig. 5 is a sectional view showing types (a) (b) of a T-shaped joist member in a system ceiling provided with the above-mentioned ceiling-embedded lighting fixture.

11: Ceiling embedded lighting fixtures 12: Lamp tube

13: Side 16: Lamp holder

21: Appliance body 26: Opening

31: Equipment installation body attached to the ceiling 40: Power input side

41: Lamp output side 42: Lighting device

43: Power terminal block 44: Lamp socket

48: Power cord insertion hole

Detailed ways

In order to further explain the technical means and effects of the present invention to achieve the intended purpose of the invention, the specific implementation, structure, characteristics and features of the ceiling embedded lighting fixture proposed according to the present invention will be described below in conjunction with the accompanying drawings and preferred embodiments. Efficacy, detailed as follows.

Please refer to FIGS. 1 to 3 , which represent the first embodiment. FIG. 1 is a bottom view of a cross-section of a ceiling-attached equipment installation body of a ceiling-embedded lighting fixture, and FIG. 2 is an enlarged cross-sectional view of a ceiling-embedded lighting fixture. (a) is a cross-sectional view along the line of FIG. 1A-A, (b) is a cross-sectional view along the line of FIG. 1B-B, and FIG. 3 is a bottom view of the assembled state of the ceiling-embedded lighting fixture.

In FIGS. 1 to 3 , ceiling-embedded lighting fixtures 11 are, for example, ceiling-embedded lighting fixtures installed in the ceiling of a grid-like system assembled from T-shaped keel members, using quadrangular ring (square ring) lamp tubes 12 As a polygonal ring light tube. The lamp tube 12 is a fluorescent tube with a tube diameter of 15mm-18mm, and is equipped with a quadrangular annular light emitting tube 15 with four corners connected at approximately right angles between straight four sides 13 and the ends of the four sides 13, and The center of one side of the luminous tube 15 is connected with the two ends of the luminous tube 15, and the lamp cap 16 of the coldest part is formed in the vicinity thereof simultaneously. The connecting pin not shown in the figure is connected to the terminal and the electrode not shown in the figure.

With the lamp tube 12 having such a tube diameter, because the lamp tube current is large, the tube wall temperature of the part of the luminous tube 15 far away from the electrodes is still very high. Therefore, it is difficult to form the coldest part even in the part of the arc tube 15 far away from the electrodes. Therefore, in this embodiment, the electrode at one end of the lamp cap 16 is set to be farther away from the lamp cap 16 than the electrode at the other end. The coldest part of the tube 15 has the lowest tube wall temperature, so that the efficiency is optimized.

The ceiling-embedded lighting fixture 11 has a fixture body 21. The fixture body 21 is in the shape of a square box with an open bottom and has a square top plate 23. The side plate 24 is formed by bending downwards from the peripheral edge of the top plate 23. And a frame portion 25 bent into a substantially L-shape around the lower end of the side plate portion 24 . The outer dimensions of the frame portion 25 of the appliance body 21 are smaller than the inner dimensions of the insertion opening surrounded by the T-shaped keel members of the system ceiling.

A square opening 26 having an opening is formed at the central portion of the top plate 23 , and a bent portion 27 is formed by bending downward from the peripheral edge of the opening 26 . The width of the opening 26 , that is, the width of a pair of facing edges and the width of the other pair of facing edges is more than 1/3 of the width of the appliance body 21 . The width of one edge of the opening 26 is smaller than the width of the other edge of the opening 26 , and the lighting device mounting portion 23 a is provided on the smaller edge of the opening 26 .

A plurality of elongated holes 28 for mounting a reflector are formed on a pair of opposing parallel sides of the top plate portion 23 . Near the outer two ends of the two side plate portions 24 on a pair of opposite parallel sides of the appliance body 21, there are mounting portions 29 mounted on the T-shaped keel member.

A ceiling-attached equipment mounting body 31 covering the lower surface of the opening 26 is detachably attached to the central portion of the appliance main body 21 with bolts or the like. The ceiling accessory equipment mounting body 31 is used to install ceiling accessory equipment such as ceiling structural components, light-transmitting panels, and ceiling cover plates, or ceiling accessory equipment such as speakers, human body induction sensors, air conditioners, emergency lights, downlights, and cameras. In this embodiment, the ceiling-attached equipment is shown by taking the ceiling cover plate 32 as an example. That is to say, the ceiling attached equipment installation body 31 is a square box shape with an upper opening, and is formed with a square ceiling cover plate 32, a side portion 33 formed by bending upwards from the peripheral edge of the ceiling cover plate 32, and bolted to the ceiling. These side portions 33 are attached to the mounting pieces 34 on the lower surface of the top plate portion 23 of the appliance main body 21 . When assembling the ceiling accessories other than the ceiling cover 32 , the ceiling accessory mounting body 31 in which each ceiling accessory is installed on the ceiling cover 32 or the like is attached to the appliance body 21 .

Between the top plate portion 23 of the appliance body 21, the side plate portion 24, and the side portion 33 of the ceiling attached equipment installation body 31, a square ring-shaped lamp tube receiving portion 37 with an open bottom is formed, and the lamp tube 12 is just accommodated and arranged in the lamp. In the tube housing part 37.

In addition, on the lower surface of the top plate portion 23 of the appliance body 21, on the edge portion of one side of the opening portion 26, that is, the lighting device mounting portion 23a, a power input side 40 is installed along one end of the opening portion 26. A lighting device 42 with a tube output side 41 is provided. On the power input side 40 of the lighting device 42, a power terminal block 43 is installed on the edge of the side intersecting with the opening 26 where the lighting device 42 is mounted. The lamp tube output side 41 of the lamp tube is connected with the lamp cap 16 of the lamp tube 12 at the edge of the side opposite to the edge of the opening 26 of the power supply terminal block 43, and simultaneously serves as a lamp cap 16 for detachably holding the lamp tube 12 The lamp tube socket 44 of the lamp tube bracket. The lighting device 42 and the power terminal block 43 are provided inside the ceiling-attached equipment mounting body 31 and are covered together with the opening 26 .

In this way, the lighting device 42 is provided between the opening 26 of the device body 21 and the inside of the side 13 intersecting with the side 13 of the cap having the lamp tube 12, at a position not overlapping the lamp tube 12 in the vertical direction.

The lighting device 42 has an inverter lighting circuit for lighting the lamp tube 12 at high frequency. Between the power input side 40 of the phase-inversion lighting circuit and the power terminal block 43, the input line not shown in the figure is connected, and between the lamp tube output side 41 of the phase-inversion lighting circuit and the lamp tube socket 44 Output lines not shown are connected.

The power terminal block 43 is mounted on the bending portion 27 close to the opening 26, and an input line insertion hole 47 for inserting and connecting the input line of the lighting device 42 is provided on the lower side, and an input line insertion hole 47 is provided on the side near the opening 26. Allow the power cord that leads from ceiling to insert and the power cord insertion hole 48 that is connected with it. The input line inserted and connected to the input line insertion hole 47 is electrically connected to the power line inserted and connected to the power line insertion hole 48 .

The lamp socket 44 is installed to pass through the installation hole 51 formed on the top plate portion 23, and the front end of the lamp socket 44 protruding from the lamp receiving portion 37 is formed with a lamp cap 16 that detachably holds the lamp 12. The U-shaped lamp tube support portion 52 is formed at the base of the lamp tube support 52 with a socket portion 53 for inserting and connecting the connecting pin protruding from the lamp cap 16 .

In addition, the base end portion of the lamp socket 44 protruding above the top plate portion 23 is provided with a direction close to the opening portion 26 for inserting and connecting the output wires of the lighting device 42 and not shown in the figure. The output line inserted and connected to the output line insertion hole is electrically connected to the socket part 53 .

In addition, a plurality of lamp holders 56 as lamp holders for detachably holding the corners 14 of the light emitting tube 15 of the lamp 12 are attached to the top plate 23 of the lamp housing 37 close to the apparatus body 21 . In the present embodiment, two lamp holders 56 are provided corresponding to two positions of the corners 14 at both ends of the side 13 parallel to the side of the lamp cap 16 on which the lamp tube 12 is provided. Each lamp tube support 56 is formed with an elastic leaf spring material, and one end is formed with a mounting portion 57 that can be fixed on the bottom of the top plate portion 23 with bolts, and the other end is formed with a lamp that is open to the side of the appliance body 21 and has a U-shaped cross section. The corner portion 14 of the light emitting tube 15 of the tube 12 snaps into the support portion 58 .

In addition, a square frame-shaped reflector 61 is mounted on the lower surface of the lamp housing portion 37 of the appliance main body 21 . The reflector 61 has a square frame body 62 , and light-transmitting plates 63 are provided at the four corners of the frame body 62 corresponding to the corners 14 of the lamp tube 12 . At the position of the side of the frame body 62, that is, at the position corresponding to the side 13 of the lamp tube 12, a pair of reflectors 64 that expand downward to reflect the light of the lamp tube 12 downward are provided, and the reflectors 64 that are erected on these reflectors A plurality of ventilation windows 65 between openings in the panel 64 . The edge of the frame body 62 is equipped with mounting springs 66 that are engaged with the long holes 28 of the appliance body 21 to guide the reflector 61 to the appliance body 21 .

When installing and constructing the ceiling-embedded lighting fixture 11 in the system ceiling, the power cord provided in the system ceiling is led out from the embedded opening surrounded by the T-shaped keel member of the system ceiling, and the fixture body 21 is supported upwards while allowing the The power cord passes through the opening 26. First, a side plate portion 24 protruding from the installation part 29 of the appliance body 21 is inserted into the opening, and through the top of the T-shaped keel member, the appliance body 21 and the appliance body 21 above the T-shaped keel member are passed through the opening. The position on the insertion opening is aligned, and then it is allowed to descend. By placing each mounting portion 29 on the T-shaped keel member, the frame portion 25 of the appliance body 21 is fitted with the inner circumference of the insertion opening.

The tip of the electric wire passing through the opening 26 of the appliance main body 21 is inserted into and connected to the power cord insertion hole 48 of the power terminal block 43 . At this time, since the power cord insertion hole 48 of the power terminal block 43 faces the inside of the opening 26 of the appliance body 21, the power cord is easily inserted from the opening 26 side and connected to the power cord insertion hole 48 of the power terminal block 43. .

Finally, install the reflector 61 under the lamp tube receiving portion 37 of the appliance body 21 .

In the ceiling-embedded lighting fixture 11 having such a structure, since the central part of the fixture body 21 is provided with an opening 26 that is at least one-third the size of the entire fixture body 21, it can be installed in the ceiling of the system during construction. By using the opening 26, the setting operation of the appliance body 21 and the wiring operation of connecting the power cord to the power terminal block 43 installed on the edge of the opening 26 through the opening 26 can be easily performed, reducing Save trouble, save time and improve construction efficiency.

In addition, since the lighting device 26 is installed between the opening 26 of the lighting device and the inner side of the lamp tube 12 at a position that does not overlap the lamp tube 12 in the vertical direction, it is possible to reduce the adverse thermal influence between the lighting device 42 and the lamp tube 12. . That is to say, it is possible to reduce the shortening of the service life caused by the heat of the lamp tube 12 when the lighting device 42 is located above the lamp tube 12, Therefore, the coldest part formed near the lamp cap 16 of the lamp tube 12 is not affected by the heat of the lighting device 42, and the light beam of the lamp tube 12 can be ensured.

In addition, since the edge of the opening 26 of the appliance body 21 is installed at one end along the edge of the opening 26 of the appliance body 21, the power input side 40 is provided, and the other end is provided with a lamp output side 41. The lighting device 42 has a power supply terminal block 43 installed on the power input side 40 of the lighting device 42, and a lamp tube socket 44 is installed on the lamp tube output side 44 of the lighting device 42, so the power supply terminal block 43 can be separated from the lamp tube socket 44 It is provided to prevent the high-frequency output of the inverter circuit of the lighting device 42 from overlapping the power line connected to the power terminal block 43 and the lamp socket 44 as noise, thereby reducing the influence of noise.

In addition, since the opening 26 covering the appliance body 21, the lighting device 42, the power supply terminal block 43, and the ceiling-attached equipment installation body 31 with the lamp tube 12 around it are installed in the central part of the appliance body 21, it is possible to use the lamp tube 12 The inner space of the utility model and the opening 26 of the appliance body 21 can effectively install various ceiling accessories. That is to say, even when the equipment attached to the ceiling includes different types of equipment such as emergency lights, downlights, and cameras, the different types of equipment can be installed so as to protrude from the opening 26 of the appliance body 21, so that Increases the freedom of setting/selection of equipment attached to the ceiling. In addition, since the appliance main body 21 is not controlled by the equipment attached to the ceiling, it can be thinned.

4 and 5 show the second embodiment.

As shown in Fig. 5 (a) (b), there are many types of T-shaped keel members 71 for the ceiling of the system where the ceiling-embedded lighting fixture 11 is installed. The width of the lower part 72 is wider than that of the upper part 73 , and the cross-section is generally an inverted T-shaped keel member.

As shown in Figure 4, the frame portion 25 of the appliance body 21 is roughly L-shaped in section from the side plate portion 24 of the appliance body 21, and has an upright portion 25a at the front end, and the outer dimension of the frame portion is smaller than the T-shaped keel member 71 of the system ceiling The inner dimensions of the surrounding insertion opening 74 .

On the two side plate parts 24 that are positioned at the position of a pair of parallel sides of appliance main body 21, the installation part 29 that is installed on the T-shaped keel member 71 usefulness is installed, and on this installation part 29, is formed with T-shaped keel member. The upper part 73 of 71 is fastened with the fastening groove 77. Also, the fastening spring 78 that is fastened with the T-shaped keel component 71 and keeps the fastened state is mounted on the appliance body 21 through the fastening of the fastening groove 77 of the mounting portion 29 and the top of the T-shaped keel component 71 .

When inserting the appliance body 21 into the insertion opening 74, the shape of the appliance body 21 is aligned with the shape of the insertion opening 74, and the side plate portion 24 protruding from one side is provided with the mounting portion 29 upwards, and the appliance body 21 is inserted into the insertion opening. 74, and insert the upper part of the T-shaped keel member on one side of the opening 74, move the side plate part 24 protruding from the other side of the appliance body 21 with the mounting part 29 upside down into the inner part of the opening, and then place the other The side plate part 24 on one side moves upwards, makes it pass the top of the insertion opening 74, that is, the top of the T-shaped keel member, aligns the position of the appliance body 21 on the insertion opening 74, and makes it descend, so that each mounting portion 29 The installation groove 77 of the T-shaped keel member 71 is buckled and fixed with the upper part 73 of the T-shaped keel member 71 . In this way, the frame portion 25 of the tool body 21 is fitted into the inner periphery of the fitting opening 74 .

Like this, by allowing the outer dimensions of the frame portion 25 of the appliance body 21 to be smaller than the internal dimensions of the insertion opening 74, the mounting portion 29 is installed on the two side plate portions 24 on a pair of parallel sides of the appliance body 21. Insert the appliance body 21 into the insertion opening 74 from the side plate part 24 protruding from one side and pass through the top of the T-shaped keel member, even if the T-shaped keel member 71 of the system ceiling is connected to the T-shaped keel member 71. The space between the upper ceiling structures is small, and the appliance body 21 can also be provided.

In addition, in FIG. 4, the example which attached the same material 32a as a ceiling surface to the ceiling-attached-equipment attachment body 31 as a ceiling-attached equipment was shown.

In addition, the lamp tube is not limited to the square ring-shaped lamp tube 12, and may also be, for example, a polygonal ring shape with a pentagon or more. In addition, it may also be a double lamp tube structure formed by two light-emitting tubes 15 arranged in parallel. Even in this case, by adopting the above-mentioned structure, the same function can be exerted and the same effect can be obtained.

In addition, the lighting device 42 is arranged on the inner side of one side 13 intersecting with the side 13 of the lamp cap having the lamp tube 12, but it can also be arranged on the inner side of the other side 13, or arranged on the side with the lamp tube 12. The inner side of the side 13 opposite to the side 13 of the lamp cap can play the same role and achieve the same effect.

In addition, the installation part 29 for installing the appliance body 21 on the T-shaped keel member 71 or the installation part for the T-shaped keel member such as the fixed spring 78 can be provided in the direction corresponding to the lamp cap side of the lamp tube 12 and the side opposite thereto. In this case, when replacing the lamp tube, even if force is applied to the device body 21 through the lamp socket 44 or the lamp bracket 56, the device body 21 can be prevented from shaking and shifting. It can make the installation and removal of the lamp tube 12 more convenient.

The above description is only a preferred embodiment of the present invention, and does not limit the present invention in any form. Although the present invention has been disclosed as above with preferred embodiments, it is not intended to limit the present invention. Anyone familiar with this field Those skilled in the art, without departing from the scope of the technical solution of the present invention, can use the technical content disclosed above to make some changes or modify equivalent embodiments with equivalent changes. Any simple modifications, equivalent changes and modifications made to the above embodiments by the technical essence still belong to the scope of the technical solution of the present invention.

Claims (5)

1. A ceiling-embedded lighting fixture, characterized in that it comprises: The appliance body has an opening formed at the central portion, and the polygonal annular lamp tube is arranged around the opening; and The lighting device is provided at a position where the opening of the device body and the lamp tube do not overlap in the vertical direction of the lamp tube. 2. A ceiling-embedded lighting fixture, characterized in that it comprises: The appliance body is formed with an opening in the central part, and a polygonal annular lamp tube with a lamp cap on one side is arranged around the opening; and The lighting device is installed between the opening of the appliance body and any side other than the side with the lamp cap, at a position that does not overlap the lamp tube in the vertical direction. 3. A ceiling-embedded lighting fixture, characterized in that it comprises: The appliance body is formed with an opening in the central part, and the polygonal annular lamp tube is arranged around the opening; The lighting device is installed between the opening of the appliance body and the lamp tube at the edge of the opening that does not overlap with the lamp tube in the up-down direction. One end along the edge of the opening is provided with a power input side, and the other end is provided with a lamp. Tube output side; The power terminal block is installed on the edge of the opening of the appliance body on the power input side of the lighting device; and The lamp socket is attached to the edge of the opening of the appliance body on the lamp output side of the lighting device. 4. The ceiling-embedded lighting fixture according to claim 3, wherein the power supply terminal block is provided with a power cord insertion hole facing inwardly of the opening of the fixture body. 5. The ceiling-embedded lighting fixture according to any one of claims 1 to 3, characterized in that it also includes a central part of the fixture body, covering the opening of the fixture body and the lighting device, and surrounding The ceiling of the lamp tube is provided with an equipment mounting body.

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