CN203202947U - Single pin safety light holder - Google Patents

Abstract

The utility model provides a single needle safety lamp holder, include: a housing having a closed end and an open end, the closed end having a central opening; a lamp cap including a first end located outside the housing through the central opening and a second end located within the housing, the lamp cap including an interior cavity; an inner cover comprising a base and a first post protruding from a first side of the base, the first post extending at least partially into the cavity of the lamp cap, a contact comprising an annular substrate to sleeve over the first post; a resilient member disposed in the cavity of the cap between the first post and the cap such that the second end of the cap contacts the contact member only under a loading force.

Description

Single pin safety light holder

technical field

The utility model relates to a safety lamp holder, in particular to a single-needle safety lamp holder used in conjunction with an LED lamp tube .

Background technique

Fluorescent lamps are widely used in lighting field. A general fluorescent lamp is powered by both ends of the lamp tube, and is started by a series iron core inductor and a parallel starter. Due to the working principle of fluorescent lamps, when one end of the lamp tube is installed to the lamp holder and an electrical connection is established during the installation of the lamp tube, the other end of the lamp tube is not live. Therefore, the structure in which both ends of the fluorescent tube are powered does not bring the risk of electric shock during installation.

At present, the lamp tubes for household or commercial lighting are gradually transitioning from traditional fluorescent lamps to LED lamps. Most LED tubes on the market use a built-in power supply, that is, the driving power is placed inside the tube. This makes it possible to directly replace existing fluorescent tubes with LED tubes without making any changes to the original circuit. However, if the power supply is still supplied from both ends of the lamp tube at this time, when one end of the LED lamp tube with built-in driving power contacts with the electrode, the other end of the lamp tube will also be charged, thus there is a risk of electric shock during installation. Such potential safety hazards are not expected, especially the new standard UL1598C for the certification of LED lighting fixtures and their installation accessories in the United States prohibits lamp tubes with such unsafe structures from entering the market.

The current solution is generally to use one end of power supply for the LED lamp tube. That is to say, all the pins of the LED light tube are arranged at the same end, and the other end has no electrical connection parts. Such structural arrangement can avoid the above-mentioned defects, but at the same time, it makes the lamp tube have polarity. This makes installation inconvenient. In addition, the way of power supply at one end also makes it easy to short circuit between the two pins.

For this reason, the utility model provides a new single-pin safety lamp holder to solve the aforementioned defects in the prior art. The LED lamp tube adopting the single-pin safety lamp head of the utility model has no polarity, so it is easy to install; at the same time, when one end of the LED lamp tube is in contact with the electrode, the other end of the lamp tube will not be charged, thus avoiding the risk of electric shock during installation risk .

Contents of the invention

According to one embodiment of the present invention, a single-pin safety lamp cap is provided, comprising: a housing having a closed end and an open end, the closed end having a central opening; a lamp cap including a a first end located outside the housing and a second end located within the housing, the lamp cap comprising an inner cavity; an inner cover comprising a base and a first post protruding from a first side of the base, the The first cylinder at least partly extends into the cavity of the lamp cap, the contact piece includes a ring-shaped substrate to be sleeved on the first cylinder; the elastic member is arranged on the lamp cap The cavity is located between the first cylinder and the lamp cap, so that the second end of the lamp cap is in contact with the contact piece only under the action of loading force.

According to yet another embodiment of the present utility model, wherein the elastic member is a compression spring.

According to yet another embodiment of the present utility model, the elastic coefficient of the compression spring is 0.8-1.5 N/mm, preferably 1.1 N/mm.

According to yet another embodiment of the present invention, when there is no loading force, the gap between the second end of the lamp cap and the contact member is 1.5-2.3mm, preferably 1.8mm.

According to still another embodiment of the present invention, wherein the first cylinder has a hollow space, and the compression spring part is installed in the hollow space.

According to still another embodiment of the present utility model, the inner side of the closed end has an annular wall defining an annular groove, and the second end of the lamp cap is located in the annular groove.

According to still another embodiment of the present utility model, wherein the inner cover has a second cylinder protruding from the base, and the contact piece is clamped between the annular wall and the second cylinder.

According to yet another embodiment of the present utility model, the contact piece further includes at least one contact piece, and the contact piece has a form of a soldered connection wire and/or a direct-plug connection wire.

According to yet another embodiment of the present invention, wherein the inner cover includes at least two arc-shaped walls protruding from the second side of the base.

According to yet another embodiment of the present utility model, there is provided an LED light tube assembly, including a single-pin safety lamp cap and an LED light tube, and the single-pin safety lamp cap includes: a housing with a closed end and an open end, the The closed end has a central opening; a lamp cap including a first end outside the housing through the central opening and a second end inside the housing, the lamp cap including an interior cavity; an inner cover including a base a seat and a first post protruding from a first side of the base, the first post extending at least partially into the cavity of the lamp cap, a contact piece comprising an annular substrate to be socketed on the On the first column; an elastic member, which is arranged in the cavity of the lamp cap, is located between the first column and the lamp cap, so that only under the action of loading force, the second end of the lamp cap contacts with the contact member touch.

According to yet another embodiment of the present utility model, the LED lamp tube includes a limiting structure installed in the gap between adjacent arc-shaped walls .

Description of drawings

In order to better understand the utility model, the relevant embodiments are now described in conjunction with the accompanying drawings, wherein:

Fig. 1 shows the combination of a single-needle safety lamp holder and an LED lamp according to an embodiment of the present invention;

Fig. 2 shows an exploded view of a single-pin safety lamp holder according to an embodiment of the present invention;

Fig. 3 shows the housing of a single-pin safety lamp holder according to an embodiment of the present invention;

Fig. 4 shows a lamp cap of a single-pin safety lamp cap according to an embodiment of the present invention;

Fig. 5 shows the inner cover of the single-pin safety lamp cap according to one embodiment of the present invention;

Fig. 6 shows a contact piece of a single-pin safety lamp cap according to an embodiment of the present invention;

Fig. 7 shows an elastic member of a single-pin safety lamp cap according to an embodiment of the present invention;

Fig. 8 shows a cross-sectional view of a single-needle safety lamp holder according to an embodiment of the present invention;

Fig. 9 shows a rear perspective view of a single-pin safety light head according to an embodiment of the present invention.

Detailed ways

Below in conjunction with accompanying drawing, the content of the present utility model is described in detail. The detailed description and drawings herein are exemplary only, and are not intended to limit the present utility model.

Fig. 1 shows an LED lamp assembly formed by combining a single-needle safety lamp cap 1 and an LED lamp 2 of the present invention. The LED lamp tube 2 is respectively installed with a lamp holder 1 at both ends, and each lamp holder 1 includes an outwardly protruding lamp cap 3, which is used as a pin installed on a lamp holder or a socket (not shown), and accepts Electrical input for external power supply. Commonly used LED lamps are, for example, T10 and T8 lamps, but other types of LED lamps and even fluorescent lamps can also be used in conjunction with the lamp holder 1 of the present utility model. The internal structure of the lamp tube 2 is well known to those skilled in the art and will not be described in detail here.

FIG. 2 shows an embodiment of the single-pin safety lamp holder 1 of the present invention, including a housing 4 , an inner cover 5 , a lamp cap 3 , a contact member 6 , an elastic member 7 and connecting members 8 and 9 .

FIG. 3 shows an exemplary embodiment of the housing 4 . The housing 4 is generally hollow cylindrical, closed at one end 42 and open at the other end 41 . The closed end 42 of the housing 4 adjoins the lamp tube bracket in the installed state, and the closed end 42 is provided with a central hole 43 . It can also be seen from the sectional view shown in FIG. 8 that the inner side of the closed end 42 can also have an inwardly protruding annular wall 44 defining an annular groove 45 . The inner side of the circumferential wall surface 46 of the housing may be smooth, or may have at least one step (not shown). Thus, the inner side of the circumferential wall surface 46 has at least a larger first inner diameter D1 and a smaller second inner diameter D2 when there is at least one step.

FIG. 4 shows an embodiment of a lamp cap 3 . The lamp cap 3 is made of conductive material, preferably copper. The lamp cap 3 can be formed by turning or stamping. The lamp cap 3 is generally cylindrical and includes a first end 31 engaged with the lamp tube holder or socket and a second end 32 opposite to the first end 31 . The first end 31 may have a shape matching the lamp tube bracket or socket, and the second end is installed in the annular groove 45 of the housing 4 . The lamp cap 3 has at least one step 33 , 34 on its outer peripheral surface along its axial direction. The lamp cap 3 is installed at least partially through the central hole 43 of the closed end 42 of the housing 4, and one 34 of the at least one step 33, 34 abuts against the inner side of the closed end 42, so that the lamp cap 3 is relatively in the limit of the housing 4. The second 33 of the at least one step 33, 34 can be used, for example, for connection to a lamp holder or a socket. The lamp cap 3 is preferably hollow so as to define a cavity 35 inside it ( FIG. 8 ).

FIG. 5 shows an exemplary embodiment of the inner cover 5 . The inner cover 5 is made of non-conductive material and has a substantially circular base 51 . In a preferred embodiment, in the installed state, the outer edge of the base 51 can abut against a step on the inner side of the peripheral wall 46 of the casing 4 . The first side of the base 51 has at least one, preferably two, outwardly protruding columns 52 , 53 . The first cylinder 52 has a smaller diameter d1, which in the mounted state can at least partially enter the cavity 35 of the lamp cap 3 . The second cylinder 53 has a larger diameter d2. In a preferred embodiment, the diameter d2 of the second cylinder 53 is not smaller than the diameter of the annular groove 45 inside the closed end 42 of the housing 4, so that the second cylinder 53 can substantially abut against the annular groove in the installed state. The annular wall 44 of the groove 45 .

The second side of the inner cover 5 has at least one outwardly extending arc-shaped wall 54, 55, and its diameter D is slightly smaller than the first inner diameter D1 inside the circumferential wall 46 of the housing 4, so that the arc-shaped wall of the inner cover 5 An annular space S is defined between 54 , 55 and the inner side of the circumferential wall surface 46 of the housing 4 . As shown in FIG. 8, the annular space S can be used for installing a lamp tube. The gap 56 between the adjacent arc-shaped walls 54 , 55 can allow the power lines or other structures of the lamp tube 2 to pass through. In a preferred embodiment, the gap 56 can be used to accommodate a limiting structure (not shown) of the lamp tube 2 . As a result, the rotation of the lamp tube 2 relative to the lamp cap 1 is blocked.

The housing 4 and the inner cover 5 can be mounted, for example, by screwing. For this purpose, the inner side of the closed end 42 of the housing 4 may have at least one boss (not shown) containing an internal thread, and correspondingly, the base 51 of the inner cover 5 may also have a boss (not shown) containing an internal thread at a corresponding position. The opening 58 , for example, the connecting piece 8 of a screw passes through the boss and the opening 58 to realize threaded connection. Of course, the housing 4 and the inner cover 5 can also be installed in other connection methods such as adhesion, crimping and the like.

In a preferred embodiment, for fixing the lamp tube 2 to the lamp base 1, a connecting piece 9 is also provided. For this purpose, a through hole 49 is provided on the closed end 42 of the housing 4 , and a through hole 59 is also provided at a corresponding position of the inner cover 5 . It can be seen from FIG. 9 that the connecting piece 9 passes through the through holes 49 and 59 for fastening the lamp cap 1 and the lamp tube together.

FIG. 6 shows an embodiment of a contact piece 6 . The contacts are produced, for example, from sheet copper, but other suitable electrically conductive materials are also possible. The contact has an annular base 61 and at least one contact piece 62, 63 extending outwardly from the annular base. In the installed state, the contact piece 6 is clamped between the housing 4 and the inner cover 5 . In a preferred embodiment, as shown in FIG. 8 , the central opening 64 of the annular substrate 61 can be sleeved on the first cylinder 52 of the inner cover 5 . Thus, the contact piece 6 is defined between the annular wall 44 of the housing 4 and the second cylinder 53 of the inner cover 5 . The at least one contact piece 62 , 63 passes through the base 51 of the inner cover 5 . For this reason, the base of the inner cover is also provided with a slot 50 for it to pass through. The groove 50 thus limits the rotation of the contact piece 6 about its axis. In a preferred embodiment, this slot 50 is also at least partially defined by a block 57 protruding from the surface of the base 51 ( FIG. 5 ). As a result, the contacts 62 , 63 are substantially contained within the groove 50 , thereby providing additional protection for the contacts 62 , 63 . As shown in Figure 5, the block 57 may also have reinforcing ribs. The contact pieces 62, 63 are electrically connected to the driving power in the LED lamp tube. The electrical connection can take many forms. For example, the contacts may be in the form of soldered connections 62 , or in the form of in-line connections 63 . Other suitable wiring forms or combinations thereof are also possible.

FIG. 7 shows an embodiment of the elastic member 7 . The elastic member 7 is, for example, a compression spring or other elastic materials. The compression spring may preferably have an elastic constant of 0.8-1.5 N/mm, more preferably 1.1 N/mm. The elastic member 7 abuts between the lamp cap 3 and the inner cover 5 so that the lamp cap 3 does not contact the contact piece 6 . The elastic member 7 is not in contact with the contact piece 6 either. In a preferred embodiment. As shown in FIG. 8 , the elastic member 7 is installed in the cavity 35 of the lamp cap 3 . In a more preferred embodiment, the first cylinder 52 is hollow, and the elastic member 7 is installed in the space defined by the cavity 35 of the lamp cap and the hollow space of the first cylinder 52 . The elastic member 7 prevents the movement of the lamp cap 3 toward the contact member 6 to define a gap H between the second end 32 of the lamp cap 3 and the contact piece 6 ( FIG. 8 ). In a preferred embodiment, the size of the gap H is preferably 1.5-2.3mm, more preferably 1.8mm. As a result, the lamp cap 3 does not come into contact with the contact piece 6 in the absence of an applied force. However, if there is a sufficiently large loading force, the lamp cap 3 overcomes the elastic force of the elastic member 7 and moves toward the contact member 6 and engages with the contact member 6 .

Thus, for the LED lamp tube assembly using the single-needle safety lamp cap 1 of the present utility model, when the LED lamp tube assembly is installed, even if the lamp cap 1 at one end has been installed on the lamp tube bracket, since the lamp cap is 3-way The movement in the direction of the contact piece 6 is prevented by the elastic piece 7, the lamp cap 3 is not in contact with the contact piece 6, and the electrical connection is blocked. At this time, the lamp holder 1 on the other side of the lamp tube 2 will not be charged. Only when the lamp caps 1 at both ends are installed on the lamp tube support, the lamp tube support presses the lamp cap 3 inwards, so that the lamp cap 3 overcomes the elastic force of the elastic member 7 and engages with the contact member 6 . At this time, the LED light tube assembly is connected with the external power supply. It can be seen that the safety lamp holder of the utility model avoids the risk of electric shock when installing the LED lamp tube.

The above is only a partial implementation of the utility model, so all equivalent changes or modifications made according to the structure, features and principles described in the scope of application of the utility model, or any combination of multiple embodiments of the utility model , are included in the scope of the present utility model.

Claims (13)

1. A single-pin safety lamp holder (1), characterized in that it includes: a housing (4) having a closed end (42) and an open end (41), the closed end (42) having a central opening (43); A lamp cap (3), comprising a first end (31) located outside the housing (4) through the central opening (43) and a second end (32) located inside the housing (4), the The lamp cap (3) includes an inner cavity (35); An inner cover (5) comprising a base (51) and a first post (52) protruding from a first side of the base (51), the first post (52) extending at least partially into the the inner cavity (35) of the lamp cap (3), a contact piece (6), which includes a ring-shaped substrate (61), so as to be socketed on the first cylinder (52); The elastic member (7), which is arranged in the inner cavity (35) of the lamp cap (3), is located between the first cylinder (52) and the lamp cap (3), so that only under the action of loading force, The second end (32) of the lamp cap is in contact with the contact piece (6). 2. The lamp holder (1) according to Claim 1, characterized in that, the elastic member (7) is a compression spring. 3. The lamp holder (1) according to Claim 2, characterized in that, the elastic coefficient of the compression spring is 0.8-1.5 N/mm. 4. The lamp holder (1) according to Claim 3, characterized in that, the elastic coefficient of the compression spring is 1.1 N/mm. 5. The lamp holder (1) according to claim 1, characterized in that, when there is no loading force, the gap between the second end (32) of the lamp cap (3) and the contact piece (6) is 1.5-2.3mm . 6. The lamp holder (1) according to Claim 5, characterized in that, when there is no loading force, the gap between the second end (32) of the lamp cap (3) and the contact piece (6) is 1.8 mm. 7. The lamp holder (1) according to any one of Claims 1-6, characterized in that, the first cylinder (52) has a hollow space, and the compression spring part is installed in the hollow space. 8. The lamp holder (1) according to any one of claims 1-6, characterized in that, the inner side of the closed end (41) has an annular wall (44) defining an annular groove (45), the The second end (32) of the lamp cap (3) is located in the annular groove (45). 9. The lamp holder (1) according to Claim 8, characterized in that, the inner cover (5) has a second cylinder (53) protruding from the base (51), and the contact piece (6) clamps held between said annular wall (44) and said second cylinder (53). 10. The lamp holder (1) according to any one of claims 1-6, characterized in that, the contact piece further comprises at least one contact piece (62, 63), and the contact piece (62, 63) has Solder and/or push-in connections. 11. The lamp holder (1) according to any one of claims 1-6, characterized in that, the inner cover (5) comprises at least two arc-shaped walls protruding from the second side of the base (51 ) (54, 55). 12. An LED lamp tube assembly, comprising the single-pin safety lamp holder (1) and the LED lamp tube (2) according to any one of claims 1-11. 13. The LED lamp tube assembly according to claim 12, wherein the LED lamp tube (2) comprises a limiting structure installed in a gap (56) between adjacent arc-shaped walls (54, 55).

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