Stripe-shaped lamp and end cap for such a stripe-shaped lamp

Description

Technical Field

[0001] The present invention relates to the field of strip-shaped lamps comprising a plurality of LEDs.Background of Invention

[0002] As the brightness of LED light-emitting components continues to improve, and due to the high luminous efficiency, small size and colorful features, LED light-emitting components as a light source for lighting lamps are gradually widely used in many different lighting applications, and LED lamps become more and more prevalent in daily use for lighting.

[0003] Existing strip-shaped LED lamps include a lamp holder usually having a U-shaped cross-section, a light transmissive lampshade covering an upper end of the lamp holder and a circuit board with LED light-emitting units soldered to it, which is accommodated in an inner cavity formed by the lamp holder and lampshade. Currently, the end covers of such strip-shaped lamps are mounted as separate pieces at the axial ends of the lamp holder, and electric wires lead through the end covers need to be connected separately to the circuit board by soldering special wire connections. All this results in a very low in productivity for assembly, especially for strip-shaped lamps with waterproofing needs, which require a much more complex structure of the end cover assemblies, require manual soldering, and are not easy to assemble.

[0004] Therefore, there is a need to develop light end structures for strip-shaped lamps, which can be efficiently mounted, do not require a soldering of electric wires during assembly and are suitable for automated production.

[0005] US 2014 / 362574 A1 discloses a strip-shaped lamp according to the preamble of claim 1, wherein a third slot is formed at a level between the first and second slot in the lamp holder sidewalls, the end cover includes guiding blocks embodied as protrusions, which are inserted into corresponding recesses formed in the lamp holder sidewalls, and the resilient terminals are

[0006] biased against contact layers of the light board. A planar rib in the inner cavity in the lamp holder for abutment against a bottom surface of the PCB of the light-emitting module is not disclosed. Moreover, the interface is of different configuration.

[0007] Comparable strip-shaped lamps are disclosed in CN 217 356 571 U and EP 4 033 145 A1 of the Applicant.Summary of Invention

[0008] In view of the above deficiencies of the prior art, it is an object of the present invention to provide a strip-shaped lamp that can be efficiently mounted, does not require a soldering of electric wires during assembly and is suitable for automated production. It is another object of the present invention to provide a simple end cover for such strip-shaped lamps.

[0009] These problems are solved by a strip-shaped lamp as claimed by claim 1.

[0010] Further advantageous embodiments are the subject-matter of the dependent claims.

[0011] The present invention provides particularly the following technical effects: (1) In the strip-shaped light of the present invention, the lampshade, the light board and the end cover holder can be mounted by means of slots, which enables an easy location and definition of the positions of the lamp components and is suitable for automated assembly. (2) The resiliently biased terminals in the end cover and the light board are electrically connected solely by mechanical contacting rather than by means of welding or soldering electric wires, which enables a simple structure and simplifies the assembly process significantly. (3) The resiliently biased terminal and an external wire harness used for electric power supply can be positioned precisely and easily in the end cover. According to a non-claimed embodiment, the wire harness can be provided with an anti-pulling structure, which additionally protects the resiliently biased terminal and wire harness connection structure in the end cover from being damaged under external pulling forces. (4) According to a non-claimed embodiment, by means of glue injection via the end cover, the end structure of the strip-shaped lamp can offer good waterproof characteristics. Overview on Drawings

[0012] Hereinafter, the preferred embodiments according to the present invention will be described in an exemplary manner and with reference to the accompanying drawings, wherein: Fig. 1is a schematic perspective view of a strip-shaped lamp of a first embodiment according to the present invention; Fig. 2is an exploded view of the end cover structure of the strip-shaped lamp of Fig. 1; Fig. 3is a schematic diagram showing details of the end cover structure of Fig. 2; Fig. 4is a schematic perspective view of a strip-shaped lamp of a second embodiment (non-claimed) that serves for a better understanding of the present invention; Fig. 5is an exploded view of the end cover structure of the strip-shaped lamp of Fig. 4; Fig. 6is a cross-sectional view of the end cover structure of Fig. 5 in an assembled state; Fig. 7shows details of a bracket end cover structure of the strip-shaped lamp of Fig. 4; Fig. 8is a schematic diagram of the connection assembly of the bracket and the resiliently biased terminal of the end cover structure of the strip-shaped lamp of Fig. 4, (a) before assembly and (b) after assembly; Fig. 9is a schematic diagram of the assembly of a bracket and a blocking head in the end cover structure of the strip-shaped lamp of Fig. 4, (a) before assembly and (b) after assembly; Fig. 10is a schematic view of the outer cover of end cover structure of the strip-shaped lamp of Fig. 4, (a) when viewed from an outer side and (b) when viewed from an inner side; Fig. 11is an exploded view of the end cover of the strip-shaped lamp of Fig. 4; and Fig. 12is an exploded view of the overall assembly of the strip-shaped lamp of Fig. 4.

[0013] Throughout the drawings, the same reference numerals designate identical or technically equivalent elements or groups of elements.Detailed Description of Embodiments Embodiment 1

[0014] Figs. 1 to 3 show a first embodiment of a strip-shaped LED-lamp according to the present invention and the following description is particularly focused on the configuration of the end cover of such a strip-shaped LED-lamp. Generally, the end structure mainly includes a lamp holder 1, a lampshade 2, a light emitting module 3 and an end cover 4.

[0015] The lamp holder 1 has a U-shaped cross-section and comprises a lamp holder base plate 11 with upright sidewalls 12 disposed on both sides of the lamp holder base plate 11 and extending basically perpendicular to the lamp holder base plate 11. The lamp holder base plate 11 and the lamp holder sidewall 12 together form a U-shaped mounting port 13 which is open towards the upper end of the lamp holder 1 and an end portion of the lamp holder 1. The lamp holder sidewalls 12 each comprise a first slot (groove) 121 and a second slot (groove) 122, each extending in the longitudinal direction of the lamp holder 1 and in parallel with, but spaced apart from, the lamp holder base plate 11.

[0016] The lampshade 2 is mounted on the lamp holder 1. The lampshade 2 is of convex shaped and provided with snap-in portions 21 protruding on both sides of the convex central portion of the lamp holder 1 in the width direction, which is parallel to the lamp holder base plate 11. The snap-in portions 21 extend in the longitudinal direction, and the snap-in portions 21 are mated with the first slot 121 so that they can be snapped into the first slots 121 and fixedly mounted therein in a positive-fit manner. In this manner, the lampshade 2 and the lamp holder 1 are connected to each other to form the inner cavity 14 of the strip-shaped lamp. In this embodiment, the first slot 121 is provided on the two opposite inner sides of the lamp holder sidewalls 12, and the lampshade 2 is connected to the lamp holder 1 by inserting the snap-in portions 21 into the opposite first slots 121 and sliding the lampshade 2 in the longitudinal direction of the first slots 121 starting from the mounting port 13 of the lamp holder 1.

[0017] As shown in Fig. 2, the lamp holder 1 is provided with two opposite second slots 122 formed in the two opposite lamp holder sidewalls 12 closer to the lamp holder base plate 11, preferably adjacent to the lamp holder base plate 11. The second slots 122 extend in the longitudinal direction of the lamp holder 1 and in parallel with the first slots 121. The second slots 122 can be used for accommodating guiding blocks 421 of bracket 42, explained in more detail hereinafter.

[0018] The light emitting module 3 comprises a strip-shaped, rectangular light board 31 and an LED unit 32 disposed on the light board 31. More specifically, a plurality of LED-units 32 is provided on the light board 31 and distributed at equidistant spacing along the longitudinal direction. The light board 31 is provided with two electrically conductive layers 33 at an end portion in the length direction. More specifically, the electrically conductive layers 33 are provided at an end portion of the light board 31, particularly at a center thereof and extending in the length direction of the light board 31, and may be embodied as two gold fingers or gold-plated connecting structures that are insulated against each other, for electrical power supply of the light emitting module 3.

[0019] Preferably, the electrically conductive layers 33 are provided on the bottom surface of the light board 31.

[0020] The end cover 4 is provided at the end of the lamp holder 1 and includes an outer cover 41, which may be plate-shaped, and a bracket 42 extending perpendicular to the outer cover 41. The outer cover 41 is connected or mounted to the end of the lamp holder 1 at the mounting port 13. For this purpose, the outer cover 41 and the end of the lamp holder 1 may be connected to each other by means of fasteners, or by means of a plug or socket-type connector or other means of connection. According to a preferred embodiment, the outer cover 41 may be snap-fitted into the mounting port 13 of the lamp holder 1 or mounted in a positive-fit manner to the mounting port 13. Generally, the outer cover 41 covers the mounting port 13 of the lamp holder 1 and seals the inner cavity 14 of the lamp holder 1 against the environment, to prevent the intrusion of dirt and moisture into the inner cavity.

[0021] Both sides of the bracket 42 are provided with a guiding block 421 each being mated to the second slots 122 and configured for insertion and sliding in the second slots 122 via the mounting port 13 along the longitudinal direction of the lamp holder 1. The bracket 42 is provided with a resiliently biased terminal 43. The resiliently biased terminal 43 and the bracket 42 may be connected to each other by means of a plug-in fastening or a fastener. The resiliently biased terminal 43 comprises an overlapping connecting portion 431 forming two contact portions that are configured to be in electric contact with the conductive layers 33 of the light board 31, in particular by abutment with the conductive layers 33. The overlapping connecting portion 431 may be a conductive sheet that is bent to a resilient contacting portion of e.g. a triangular profile. The outer cover 41 is provided with an interface 411 for electrically connecting the external wiring harness 5 to the resiliently biased terminal 43, i.e., for supplying the light board 31 with an external power via the resiliently biased terminal 43. Fig. 3 shows the general configuration of the end cover 4, wherein the resiliently biased terminal 43 may be a one-piece molded structure, and wherein the resiliently biased terminal 43 may be formed with barbs or resilient tongues at fixed positions relative to the bracket 42.

[0022] As shown in Fig. 2, the lamp holder 1 is provided with a rib 15 extending in the longitudinal direction and adapted to support or abut against the bottom surface of the light board 31. The front end of the rib 15 is spaced apart to the mounting port 13 of the lamp holder 1. The sides of the rib 15 are fixedly connected to the lamp holder sidewalls 12. According to another embodiment not claimed, the rib 15 may be a structure integrally molded or extruded in the lamp holder 1 with the lamp holder sidewall 12. The rib 15 is a planar structure, which is used to support the light board 31, and also serves for dissipating heat away from the light board 31 to the lamp holder 1 by thermal contact. Moreover, the rib 15 may also serve for enhancing the mechanical stability of the lamp holder 1. An additional limiting strip 125 may be formed on the side wall 12 of the lamp holder 1, to form a third slot 123 extending in the longitudinal direction, which is formed adjacent to first slot 121. The light board 31 is inserted into the inner cavity 14 of the lamp holder 1 via the opening port 13 along the third slot 123 so that the lateral edges of the light board 31 are accommodated in the third slots 123. Unlike the traditional assembly of the light board 31 with soldered wires, the light board 31 of the present invention is not provided with patch connectors at both ends, but is mounted on the rib 15, which requires that the bottom surface of the light board 31 opposite to the upper surface with the LED units 32 does not have a protrusion. Accordingly, the light board 31 is preferably not provided with a patch connector at the end of the light board 31, and the LED unit 32 does not have a protrusion at its bottom surface. For electric power supply, two conductive layers 33 are provided on the light board 31 at an end portion thereof (cf. Fig. 2), which are contacted via the overlapping connecting portion 431 of the resiliently biased terminal 43. Moreover, the end of the rib 15 is provided with an avoidance opening for the end cover 4 to be mounted into the inner cavity 14 of the lamp holder 1.

[0023] Positioning blocks 422, which may be pin-shaped as shown in Fig. 3, may be provided on both sides of the bracket 42 as shown in Fig. 2, and corresponding positioning slots 124 may be formed on the sidewalls 12 of the lamp holder 1 to accommodate to the positioning blocks 422 for precisely positioning the bracket 42 and end cover 4.

[0024] The depth of the positioning blocks 422 may be less than that of the guiding blocks 421, and the level (above the bottom end of end cover 4) at which the positioning blocks 422 are provided is a little higher than the bracket 42.

[0025] As shown in Fig. 2, the lamp holder 1 is provided with the lampshade 2, the light board 31, and the bracket 42 in order from top to bottom. The plurality of LED-units 32 is provided at the upper surface of the light board 31 and directed toward the lampshade 2, and the electrically conductive layers 33 are provided at the bottom surface of the light board 31. For assembly, the lampshade 2 and the light board 31 are first installed in the lamp holder 1 by insertion via the mounting port 13, and then the end cover 4 is installed by insertion into the mounting port 13 of the lamp holder 1. During installation of the end cover 4, the guiding blocks 421 of the bracket 42 first enter along the second slots 122 for a certain distance, and then the positioning blocks 422 enter the positioning grooves 124 until the outer cover 41 rests against the end portion of the lamp holder 1 in order to cover and seal the mounting port 13 of lamp holder 1, and the overlapping connection portions 431 of the resiliently biased terminal 43 of the bracket 42 resiliently contact the electrically conductive layers 33 on the bottom surface of light board 31 after installation.

[0026] As shown in Fig. 3, the outer cover 41 and the bracket 42 may be formed in one piece, so that in the assembly process, the light board 31 and the lampshade 2 are mounted to the lamp holder 1 via the slots 121 and 123, and the resiliently biased terminal 43 provided at the end cover 4 is assembled as a whole at the end portion of the lamp holder 1, which simplifies the assembly steps and facilitates automated production.Embodiment 2

[0027] Figs. 4 to 12 show a second embodiment (non-claimed) of a strip-shaped LED-lamp that serves for a better understanding of the present invention, wherein the following description is particularly focused on the configuration of the end cover of such a strip-shaped LED-lamp. The end structure of the strip-shaped lamp mainly includes a lamp holder 1, a lampshade 2, a light-emitting module 3 and an end cover 4. In this embodiment, the configuration of the lamp holder 1 and end cover 4 is different as compared to the afore-mentioned first embodiment.

[0028] The lamp holder 1 has a U-shaped cross-section and comprises a lamp holder base plate 11 with upright sidewalls 12 disposed on both sides of the lamp holder base plate 11 and extending basically perpendicular to the lamp holder base plate 11. The lamp holder base plate 11 and the lamp holder sidewall 12 together form a U-shaped mounting port 13 which is open towards the upper end of the lamp holder 1 and an end portion of the lamp holder 1, which open towards the front end (lateral side of lamp holder 1) and forms a mounting port 13. The lamp holder sidewalls 12 each comprise a first slot (groove) 121, which is open towards the upper end of the lamp holder 1, and a second slot (groove) 122, which is open towards the inner cavity of lamp holder 1. Each of the slots 121, 122 extend in the longitudinal direction of the lamp holder 1 and in parallel with each other.

[0029] As shown in Figs. 5 and 6, the lampshade 2 is mounted on the lamp holder 1. The lampshade 2 is convex shaped and provided with snap-in portions 21 protruding on both sides of the lamp holder 1 at a bottom end thereof and along the width direction. The snap-in portions 21 extend in the longitudinal direction of the lampshade 2, and the snap-in portions 21 are installed in conjunction with the first slot 121 so that they can be snapped or inserted into the first slots 121 and fixedly mounted therein in a positive-fit manner. In this manner, the lampshade 2 and the lamp holder 1 can be connected to form the inner cavity 14 of the strip-shaped lamp. The profile of the snap-in portions 21 of the lampshade 2 is mated to the profile of the first slots 121, and the snap-in portions 21 are snap-fitted or inserted into the first slots 121, and the size of the entrance of the first slot 121 is smaller than the end surface of the snap-in portion 21, so that the snap-in portions 21 can be slid into the first slots 121 from the open end of the lamp holder 1, i.e. via the mounting port 13, thereby enabling a lateral mounting. The snap-in portions 21 can be embedded and positioned at the bottom of the first slots 121 after entering along the opening of the first slots 121.

[0030] The light emitting module 3 is disposed in the inner cavity 14 of lamp holder 1 and includes a light board 31 and a plurality of LED-units 32 disposed on the upper side of light board 31. More specifically, a plurality of LED-units 32 may be provided on the light board 31 and distributed at equidistant spacing along the longitudinal direction. The light board 31 is provided with an electrically conductive layer 33 at an end portion in the length direction. More specifically, the electrically conductive layer 33 is provided at an end portion of the light board 31, particularly at a center thereof and extending in the length direction of the light board 31, and may be embodied as two gold fingers or gold-plated connecting structures that are insulated against each other, for electrical power supply of the light emitting module 3.

[0031] The end cover 4 is provided at the end of the lamp holder 1 and includes an outer cover 41, which may be plate-shaped, and a bracket 42 extending perpendicular to the outer cover 41, i.e. in the longitudinal direction of lamp holder 1. The outer cover 41 is connected or mounted to the end of the lamp holder 1 at the mounting port 13, to thereby cover the mounting port 13 and seal it against the environment for preventing intrusion of dirt and moisture into the inner cavity 14. For this purpose, the outer cover 41 and the end of the lamp holder 1 may be connected to each other by means of fasteners, or by means of a plug or socket-type connector or other means of connection. According to a preferred embodiment, the outer cover 41 may be snap-fitted into the mounting port 13 of the lamp holder 1. Both sides of the bracket 42 may be provided with guiding blocks 421 that are mated to the second slots 122 and configured for insertion and sliding in the second slots 122 via the mounting port 13 along the longitudinal direction of the lamp holder 1. A limiting block 423, preferably a pair of limiting blocks 423, may be provided at the bottom side of the bracket 42. In the process of inserting the bracket 42 along the second slots 122 in the lamp holder 1, the limiting block 423 finally reaches a limit position when it rests against the lamp holder 1 so that the bracket 42 cannot be inserted beyond this limit position into the lamp holder 1. The bracket 42 is provided with a resiliently biased terminal 43. The resiliently biased terminal 43 and the bracket 42 may be connected to each other by means of a plug-in fastening or a fastener. The resiliently biased terminal 43 comprises an overlapping connecting portion 431 forming two contact portions that are configured to electrically contact the conductive layers 33 of the light board 31 by abutment. The overlapping connecting portion 431 may be a conductive sheet that is bent to a resilient contacting portion of e.g. a triangular profile. The outer cover 41 is provided with an interface 411 such as a plug or socket connector, for electrically connecting the external wiring harness 5 to the resiliently biased terminal 43, i.e., for supplying the light board 31 with an external power via the resiliently biased terminal 43.

[0032] As shown in Fig. 5, a pair of limiting strips 125 extends basically perpendicular to the lamp holder base plate 11, spaced apart to the lamp holder sidewalls 12 to form the first slots 121. At the upper ends of the limiting strips 125 a protrusion is formed projecting into the inner cavity 14 of lamp holder 1, basically in parallel to the lamp holder base plate 11 to thereby form the second slots 122. The two lateral edges of the light board 31 can be inserted into the second slots 122 by insertion via the mounting port 13 and sliding along the longitudinal direction, and after assembly the bottom surface of the light board 31 rests against the lamp holder base plate 11. That is, both the light board 31 and the bracket 42 are mounted on the lamp holder 1 by means of the second slot 122, and for assembly, it is necessary to mount the light board 31 first and then the bracket 42.

[0033] As shown in Figs. 5 to 8, the resiliently biased terminal 43 is connected to the external wiring harness 5, e.g. via a plug or socket connector, and passes through the end of the bracket 42 and is fixedly mounted on the bracket 42. An accommodation opening 424 is provided in the bracket 42 near the side of the head to be adapted to fit with the resiliently biased terminal 43, and a stopper 425 is provided at the end of the accommodation opening 424 for limiting the longitudinal position of resiliently biased terminal 43, and a stopper 425 is provided in the middle part of the bracket 42 adjacent to the accommodation opening 424 for restricting the resiliently biased terminal 43 and in particular for separating the two contact fingers of the resiliently biased terminal 43 to prevent short-circuiting. For assembly in the bracket 42, as shown in Fig. 8, the resiliently biased terminal 43 is first made to pass into the holding port 424 from the top down, as shown in Fig. 8(a), until the resiliently biased terminal 43 contacts the end portion of the holding port 424, and then it is turned over or pivoted downward by about 90 degrees, and the stopper 425 may be pressed downwardly to hold down the end portion of the resiliently biased terminal 43. On the opposite side, the external wiring harness 5 is installed between the limiting post 426 from the top down, and is then fixed by the central limiting post 426 in the middle of the bracket 42 and adjacent to the holding port 424. Optionally, the central limiting post 426 may be provided with an inverted buckling portion to limit the external wiring harness 5, particularly in a positive-fit manner. In this way, as shown in Fig. 8(b), the resiliently biased terminals 43 do not flip relative to each other, for preventing in particular a short-circuiting, and the external wiring harness 5 does not detach from the bracket 42 after the installation is completed, thereby achieving a fixing effect.

[0034] Because the light board 31 rests against the lamp holder base plate 11, the LED-units 32 and the conductive layer 33 on the light board 31 are provided on the upper side of the light board 31. The width of the conductive layer 33 provided at the end portion of the light board 31 is smaller than the width of the middle portion of the light board 31. The LED-unit 32 are provided on the light board 31 in the area starting from the conductive layer 33 to the opposite end portion of the light board 31 if viewed in the longitudinal direction. The overlapping connecting portions 431 of the resiliently biased terminal 43 are provided and configured such that they pass downward through the holding port 424 and abut against the contacting fingers formed by conductive layer 33 of the light board 31 for electric power supply.

[0035] A holding groove may be provided in the head of the bracket 42 which is suitable for holding the end portion of the light board 31. More specifically, the head of the bracket 42 may be provided with an accommodation slot 427 (cf. Figs. 9a and 9b) suitable for accommodating an end portion of the light board 31, for defining the level of the end portion of the light board 31 and ensure a reliable electrical contact between the overlapping connecting portions 431 of the resiliently biased terminal 43 and the contact fingers formed by the conductive layer 33 on the light board 31. The accommodation slot 427 may be formed on a bottom side of the bracket 42, and the accommodation slot 427 is connected to the accommodation opening 424.

[0036] The bracket 42 and the outer cover 41 may be provided with an anti-pull block 46, which is provided outside the external wiring harness 5 and is fixedly connected to the external wiring harness 5. The fixed connection of the anti-pull block 46 and the external wiring harness 5 may be adhesive fixing, extruding fixing, ultrasonic welding, etc. The anti-pull block 46 abuts against the outer cover 41, the outer wiring passes through the interface 411 of the outer cover 41 and is then fixedly connected to the anti-pull block 46. When the external wiring harness 5 is pulled outwardly, the anti-pull block 46 will be pressed against the outer cover 41 to prevent further outward movement, thereby protecting the connection structure of the external wiring harness 5 and the resiliently biased terminal 43, and achieving the effect of anti-pull protection.

[0037] The end cover 4 may also include a blocking head 44, which is provided with a sealing ring 441 and is matingly connected to the bracket 42 and has an interference fit with the inner wall of the lampshade 2. As shown in Fig. 9, the blocking head 44 is mounted on the upper side of the bracket 42 and is positioned for mounting through a post hole structure. Instead of a single sealing ring 441 there may be provided a plurality of sealing rings to further improve the sealing effect, and when the blocking head 44 is accessed or mounted to the lampshade 2, the sealing is achieved by the sealing ring 441 and the inner wall of the lampshade 2 resiliently contacting each other. The blocking head 44 may optionally be made of an elastic material such as a soft rubber for this purpose.

[0038] Preferably, the outer cover 41 is provided with a mounting recess 412 adapted to the bracket 42 at an end opposite the bracket 42, as shown in Fig. 10b. Moreover, the outer cover 41 may also be provided with an accommodation groove (slot) 413 adapted to the anti-pull block 46. The outer cover 41 may be provided with a positioning post 414 or a pair of positioning posts 414 directed towards the bracket 42, and the end of the bracket 42 may be provided with a positioning hole 428 corresponding to the positioning post 414, so that the bracket 42 can be positioned in the outer cover 41 by the cooperation of the at least one positioning post 414 and the corresponding positioning hole 428. During assembly, when the outer cover 41 approaches the end of the lamp holder 1, the outer cover 41 first accommodates the anti-pull block 46, then abuts against the bracket 42, and then fits against the lamp holder 1 for assembly, as shown in Fig. 11.

[0039] The outer cover 41 and the lamp holder 1 may be connected to each other by fasteners, for example by screws 45. The outer cover 41 may be provided with mounting holes 415 corresponding to the screws 45, and a threaded port may be provided at the opening of the second slot 122 of the lamp holder 1, and the outer cover 41 may be mounted at the end of the lamp holder 1 by means of the screws 45 extending along the mounting holes 415.

[0040] During assembly, the resiliently biased terminal 43 is fixedly mounted on the bracket 42 after connecting the external wiring harness 5. Then, the anti-pull block 46 is fixed on the external wiring harness 5, the blocking head 44 is mounted on the bracket 42, and the light emitting module 3 and the lampshade 2 are mounted in the lamp holder 1. Then, the outer cover 41 is connected to the external wiring harness 5 and is mounted against the anti-pull block 46 towards the end portion of the lamp holder 1, and the connection is tightly fastened after installation. Subsequently, a connection terminal is assembled at the other end of the external wiring harness 5.

[0041] The outer cover 41 may be provided with a glue injection hole 416, and after installation of the outer cover 41 a glue may be injected via the glue injection hole 416 into a glue injection cavity 16 formed between the end cover 4 and the blocking head 44, the lamp holder 1, and the lampshade 2. Hence, a waterproof structure can be accomplished at the end of the lamp holder 1 after the glue injection. Furthermore, after the snap-in portion 21 of the lampshade 2 is inserted into the first slot 121, the glue injection may be performed at the bottom of the first slot 121 for sealing to accomplish a waterproofing between the lampshade 2 and the lamp holder 1.

[0042] A preferred specific embodiment of the present invention has been described in detail above. It should be understood that a person of ordinary skill in the art can make many modifications and changes according to the general concept of the present invention without becoming inventive.List of Reference Numerals

[0043] 1lamp holder 11lamp holder base plate 12lamp holder side wall 121first slot 122second slot 123third slot 124positioning groove 125limiting strip 13mounting port 14lamp inner cavity 15rib 16glue injection cavity 2lamp shade 21snap-in portion 3light emitting module 31light board 32LED unit 33conductive layer 4end cover 41outer cover 411interface 412mounting recess 413receiving slot 414positioning post 415mounting hole 416glue injection hole 42bracket 421guiding block 422locating block 423limiting block 424accommodating port 425stopper 426limiting post 427accommodation slot 428locating hole 43resiliently biased terminal 431overlapping connecting portion 44blocking head 441sealing ring 45screw 46anti-pull block 5external wiring harness

Claims

1. A strip-shaped lamp, comprising a lamp holder (1), a lampshade (2) mounted on the lamp holder (1), a light emitting module (3) disposed in an inner cavity (14) formed by the lamp holder (1) and the lampshade (2), and an end cover (4), wherein the lamp holder (1) comprises a lamp holder base plate (11) and two lamp holder sidewalls (12) disposed on opposite sides of the lamp holder base plate (11), the lamp holder base plate (11) and the lamp holder sidewalls (12) forming a mounting port (13) at an axial end of the lamp holder (1), wherein first slots (121) and second slots (122) are formed in the lamp holder sidewalls (12), each extending in a longitudinal direction of the lamp holder (1); the lampshade (2) comprises snap-in portions (21) provided on both sides of the lampshade (2) and extending in the longitudinal direction, wherein the snap-in portions (21) are positively accommodated in the first slots (121) so that the lampshade (2) and the lamp holder (1) are connected to each other and form the inner cavity (14); the light emitting module (3) is provided in the inner cavity (14) of the strip-shaped lamp and comprises a light board (31) with a plurality of LED-units (32) disposed on the light board (31), wherein two conductive layers (33) are provided at an axial end of the light board (31) that are insulated against each other; and the end cover (4) is provided at the axial end of the lamp holder (1) to cover the mounting port (13) at the axial end of the lamp holder (1); wherein third slots (123) are formed in the lamp holder sidewalls (12) at a level between the first and second slots (121, 122), each extending in the longitudinal direction, wherein lateral edges of the light board (31) are inserted in the third slots (123), the end cover (4) comprises an outer cover (41) and a bracket (42), the bracket (42) is provided on both sides with guiding blocks (421) that are positively accommodated in the second slots (122) of the lamp holder (1), the bracket (42) is provided with a resiliently biased terminal (43) connected to the bracket (42), the resiliently biased terminal (43) comprises an overlapping connecting portion (431) forming two contact portions in electric contact with corresponding conductive layers (33) of the light board (31) and resiliently biased against the corresponding conductive layers (33) of the light board (31) for electric power supply, and the outer cover (41) is provided with an interface (411) for electrical connection of an external wiring harness (5) to the resiliently biased terminal (43); characterized in that the lamp holder (1) comprises a planar rib (15) spaced apart to the mounting opening (13), extending in the longitudinal direction and two opposite lateral edges thereof being connected to the lamp holder side walls (12), wherein a bottom surface of the light board (31) abuts against an upper surface of the planar rib (15) for establishing a thermal contact for heat dissipation.

2. The strip-shaped lamp as claimed in claim 1, wherein the overlapping connecting portion (431) is a conductive sheet bent to a resilient contacting portion, in particular to a resilient contacting portion of a triangular profile.

3. The strip-shaped lamp as claimed in claim 1 or 2, wherein a limiting strip (125) is formed on the lamp holder sidewalls (12) adjacent to the first slots (121) to form said third slots (123).

4. The strip-shaped lamp as claimed in any of the preceding claims, wherein the bottom surface of the light board (31) opposite to an upper surface thereof with the LED units (32) is not provided with protrusions.

5. The strip-shaped lamp as claimed in any of the preceding claims, wherein and end of the rib (15) is provided with an avoidance opening for the end cover (4) to be mounted into the inner cavity (14) of the lamp holder (1).

6. The strip-shaped lamp as claimed in any of the preceding claims, wherein positioning blocks (422) are provided on both sides of the bracket (42), and corresponding positioning slots (124) are formed on the sidewalls (12) of the lamp holder (1) to accommodate the positioning blocks (422) for precisely positioning the bracket (42) and end cover (4), wherein a depth of the positioning blocks (422) is less than that of the guiding blocks (421) and the level of the positioning blocks (422) above the bottom end of the end cover (4) is a little higher than the bracket (42).

7. The strip-shaped lamp as claimed in any of the preceding claims, wherein the outer cover (41) and the bracket (42) are formed in one piece.

8. The strip-shaped lamp as claimed in any of the preceding claims, wherein the lampshade (2) is convex shaped.

9. The strip-shaped lamp as claimed in any of the preceding claims, wherein a width of the electrically conductive layer (33) at the axial end of the light emitting module (3) is smaller than a width of a middle portion of the light emitting module (3).

10. The strip-shaped lamp as claimed in any of the preceding claims, wherein the electrically conductive layers (33) are formed as two gold fingers or gold-plated connecting structures.

11. The strip-shaped lamp as claimed in any of the preceding claims, wherein the outer cover (41) is plate-shaped and the bracket (42) extends perpendicular to the outer cover (41).