CN201638781U - base for lamp - Google Patents

Abstract

This utility model relates to a base (3) for an electric lamp (1, 1'), having outwardly extending electrical contacts (7, 8) for electrical contact with the lamp (1, 1'), the contacts (7, 8) being spaced apart from each other and electrically insulated by an insulating element (10), and the contacts (7, 8) being mechanically connected to the insulating element (10), wherein the insulating element (10) has at least one predetermined deformable position (10a, 10b, 10c).

Description

base for lamp

technical field

The utility model relates to a base for an electric lamp, which has electric contact pins extending outwards for electrical contact with the lamp, the contact pins are separated from each other and electrically insulated by an insulating element, and are mechanically connected to the insulating element connect.

Background technique

A rod-shaped fluorescent lamp comprises a straight tubular discharge vessel, at opposite ends of which electrical bases are respectively arranged. The bases each comprise two outwardly directed contact pins which are separated from one another and electrically insulated by an insulating element, in particular an insulating plate.

Such fluorescent lamps can also be mounted in so-called swivel sockets, for example socket G5 or socket G13. For installation, it is provided here that the fluorescent lamp is inserted into two opposing swivel sockets and then rotated about their longitudinal axis. The final position is then reached after less than a full 360° rotation, and the position of the fluorescent lamp is precisely set and locked.

After prolonged operation of lamps with such a swivel base, dirt and/or high operating temperatures can cause the swivel base to become clogged and hard to reach when installing and removing the lamp. Here, forces occur which can destroy the base structure. In particular, the base circuit board, which corresponds to the small insulating plate in which the two contact pins are fixed, may come off as a whole. Due to this falling off, the entire insulating plate, the contact pin and the lead wire may be twisted, so that the lead wire in electrical contact with the contact pin can touch the housing of the base due to the twist. Since the housing is made of an electrically conductive material, in particular aluminum, high voltages can be applied to the housing. For example, during a cold start—EVG (electronic ballast), an ignition voltage of approximately 2000 Vpp is applied, which can therefore also be applied to the housing that is accessible and accessible from the outside.

Utility model content

The object of the present invention is to provide a base for an electric lamp in which the electric lamp can be mounted or removed from the lampholder with increased reliability.

This object is achieved by the base provided by the utility model. The utility model provides a base for an electric lamp, which has an outwardly extending electrical contact pin for electrical contact with the lamp, the contact pins are separated and electrically insulated from each other by an insulating element, and the contact pins Mechanically connected to the insulating element, characterized in that the insulating element is formed from a plastic sheet with a thickness of less than 1 mm and is designed such that it deforms under the action of a force greater than 80 N.

A base for an electric lamp according to the present invention comprises outwardly extending electrical contact pins for making electrical contact with the lamp. The electrical contact pins are arranged at a distance from one another and are electrically insulated from one another by insulating elements. Furthermore, the electrical contact pins are mechanically connected to the insulating element. The insulating element thus also serves as a mechanical support for the electrical contact pin.

The insulating element has at least one predetermined deformation point which is designed such that it deforms, in particular breaks or bends, under the action of a force of greater than 80 N.

It can likewise be provided that breaking or bending of the insulating element is ensured without such predetermined deformation points. In such an embodiment, however, all processing parameters and prefabricated material properties must be precisely followed and matched to one another.

This configuration of the base prevents the entire base circuit board from detaching and thus prevents the insulating element from of detachment.

In the event of a defined force acting on the contact pin, which is then also transmitted to the insulating element, through a predetermined deformation position, this insulating element will undergo a defined deformation, thus also being able to prevent electrical contact of the leads with the housing of the base .

A predetermined deformation point is preferably understood to be a configuration which, under the action of a corresponding force, ensures a defined snapping off of the insulating elements against each other and is thus a predetermined breaking point. The insulating element is thus to a certain extent completely separated at the predetermined breaking point. However, the notionally predetermined deformation position is preferably also understood to mean a configuration that does not lead to such a complete fracture of the insulating element. This is also to be understood in particular as a predetermined bending position, which at the corresponding position allows a defined bending or twisting or similar deformation of the insulating element due to the connection with the The other regions are caused by material thinning or thinning of the material compared to that which occurs in a defined manner there.

The predetermined deformation locations preferably extend over the entire width of the insulating element. In addition or as an alternative to this, it is provided that the predetermined deformation point extends over the entire length of the insulating element. This embodiment can again define a break or bend of the insulating element at a desired location.

The insulating element preferably has through-openings, wherein the electrical contact pins each extend through the openings. The predetermined deformation locations each lead to one of the bores in the insulating element. In this configuration, therefore, there are at least two predetermined deformation locations extending over the edge of the hole. This construction permits reliable snapping or bending at defined points where the force acts as a contact point for the force path when installing or removing the lamp in the lampholder, before detachment of the entire insulating element takes place. pass on. Breaking or bending of the insulating element can be achieved as required by forming the predetermined breaking point at two points at which the contact pins are connected to the insulating element.

In particular, it is proposed that the predetermined deformation point extends on both sides of the opening in the insulating element and thus opens into the opening from both sides. Since a corresponding snapping or bending is allowed independently of the force path that occurs, as in the case of a lever action, a reliable snapping or bending of the insulating element can be improved by such a particularly symmetrical embodiment. For example, a predetermined deformation point leading to the hole is also understood to be a lateral passage on the hole tangential to the edge of the hole. However, the predetermined deformation point can also be designed so that it does not come into contact with or does not touch the hole or the edge of the hole in the insulating element.

The predetermined deformation point is preferably formed as a line, in particular a straight line, within the insulating element. This straight line can be formed continuously or by a plurality of separate points. For example, the sum of a plurality of perforations such as perforation points and/or perforation seams can also be understood as the predetermined deformation position.

The insulating element is preferably formed with a thickness of less than 1 mm, in particular with a thickness of approximately 0.8 mm. With this configuration relatively thin insulating elements can be used. The effect of the predetermined deformation position can thus be improved again.

The predetermined deformation location is preferably formed as a recess in the insulating element. This means that the predetermined deformation location is characterized by a thinning of the material of the insulating element.

In particular, the predetermined deformation locations have a depth of between 0.05 mm and 0.15 mm, in particular approximately 0.1 mm.

It is preferably provided that the contact pins are fixed in the broken or bent state of the insulating element. This embodiment can positively contribute to the fact that the leads connected to the electrical contacts do not come into electrical contact with the housing of the base.

The insulating element is preferably arranged in a recess on the outer side of the housing of the base. In particular, it is proposed that the housing has a fastening edge by means of which the insulating element can be held on the housing. The overlapping of these fastening edges is preferably designed such that the insulating element cannot fall off before snapping or bending, and is also designed such that, when the insulating element snaps off, the insulating element snapped off in two or more parts remains securely still. The freedom of movement of the contacts within the snap-off insulating element is preferably limited so that parts under voltage cannot reach the base.

Due to the base, no base short-circuit occurs after very high forces acting on the contact pins, ie no ignition/operating voltage is applied to the base, in particular to the housing. Product safety has been significantly improved. Furthermore, the costs for the base system are reduced by saving material in the insulating element and in the electrical contacts.

It can be provided that the base only has insulating elements. It can also be provided that the base has at least two insulating elements, in particular plate-shaped insulating elements. Therefore, the utility model can be designed for single circuit board base and multi-circuit board base.

Description of drawings

Embodiments of the utility model are described in detail below with the aid of schematic diagrams. The accompanying drawings show:

1 shows a schematic cross-sectional view through a base of a fluorescent lamp according to a first embodiment;

Fig. 2 shows a schematic side view of a base for an electric lamp according to a second embodiment of the present invention;

Fig. 3 shows a perspective view of the base according to Fig. 2 in a first state;

Figure 4 shows a perspective view of the base according to Figure 2 in a second state; and

Figure 5 shows a top view of several embodiments of the insulating element of the base;

FIG. 6 shows a schematic illustration of another embodiment of the insulating element and the base.

Detailed ways

Identical or functionally identical elements are provided with the same reference symbols in the figures.

FIG. 1 shows a side view of a partial area of a rod-shaped fluorescent lamp 1 having a linear, tubular glass bulb 2 as a discharge vessel. At the two opposite ends of the rod-shaped glass bulb 2 a seat is respectively provided, of which only the seat 3 is shown in the partial view according to FIG. 1 . An electrode 4 is arranged inside the glass bulb 2 , said electrode being connected to electrode holders or leads 5 and 6 . Leads 5 and 6 , also referred to as supply lines, lead into base 3 and in particular extend into empty electrical contact pins 7 and 8 . The contact pins 7 and 8 extend outwards from the base housing 9 and are provided for insertion into a socket, notably a swivel socket as shown, and are thus able to make electrical contact with the lamp 1 .

The contact pins 7 and 8 are electrically insulated from each other by an insulating element 10 in the form of a plate. Leads 5 and 6 can be crimped or soldered to contact pins 7 and 8 , for example. Furthermore, the contact pins 7 and 8 are arranged spaced apart from one another and electrically insulated by the insulating element 10 , and are also mechanically connected to the insulating element 10 .

FIG. 2 shows a further exemplary embodiment of a fluorescent lamp 1', in which, unlike the configuration in FIG. 1, the base 3' has a differently shaped base housing 9'. This housing 9' tapers or conically forms on the side facing away from the glass bulb 2.

FIG. 3 shows a schematic perspective view of the base 3 in the first state. The base 3 can also be a base 3'. The differences between the base housings 9 and 9' are of minor importance for the further description. The base housing 9 has a recess 9 a on its outer side, into which the insulating element 10 is inserted and held. In order to hold the plate-shaped insulating element 10 , opposite sides 9 b shown in FIG. 4 are formed on the base housing 9 . It overlaps the insulating element 10 on its upper side. For the sake of clarity of illustration, only this edge 9 b is shown in FIG. 4 , but in principle the embodiment in FIG. 3 also exists. As shown in FIG. 4 , the edge 9 b is designed in such a way that it still holds the insulating element 10 securely in the recess 9 a when the insulating element 10 is broken or bent. In this exemplary embodiment, the side 9b is formed as an inwardly protruding web. However, it can also be provided with various other configurations of the sides. It is important that the spacer 9 b can hold the insulating element 10 even in a state where the insulating element 10 is broken or bent.

The contact pins 7 and 8 extend through through-holes 10d and 10e in the insulating element 10 (FIG. 5). Furthermore, in the embodiment shown in FIG. 3 , the insulating element 10 comprises two predetermined deformation points 10 a and 10 b extending over the entire width b of the insulating element 10 . As can be seen from the drawing in FIG. 3 , the predetermined deformation points 10 a and 10 b lead to openings 10 d or 10 e of the insulating element 10 , respectively.

The predetermined deformation locations 10 a and 10 b are formed by recesses in the surface formed by the visible side of the insulating element 10 and have a depth of approximately 0.1 mm.

In the state of the base 3 shown in FIG. 3 , the insulating element 10 is substantially planar and is arranged without breaking or bending at the predetermined deformation points 10 a and 10 b.

FIG. 4 shows a schematic perspective view of the base 3 in the state in which a force is exerted by the contact pins 7 and 8 when the lamp 1 or 1 ′ is removed from the swivel socket. Then, the insulating element 10 is broken or bent at the predetermined deformation position 10b. This defined deformation of the insulating element 10 above the force limit can prevent electrical contact of the lead 6 with the base housing 9 made of aluminum. This defined breaking or bending prevents the entire insulating element 10 from falling off in its undeformed plate-like form, as is the case in the prior art. As a result, the entire insulating element 10 can no longer be twisted and therefore the leads, if possible, can also no longer come into contact with the base housing 9 , which can also significantly increase safety.

In this embodiment, the insulating element 10 has a thickness d of approximately 0.8 mm.

Even in the state of the base 3 shown in FIG. 4 it can be ensured that the contact pins 8 are provided to remain securely fastened to the insulating element 10 . This is ensured in particular at predetermined bending positions, which is possible in particular without additional securing measures. Furthermore, the freedom of movement of the contact pins 7 and 8 in the broken or bent insulating element 10 is restricted, so that parts under voltage cannot reach the regions of the base housing 9 .

In FIG. 5 , a schematic diagram is shown in plan view, in which it can be seen that predetermined deformation positions 10 a and 10 b extend over the entire width b, said predetermined deformation positions 10 a and 10 b opening on both sides into holes 10 d and 10 d respectively. until 10e. Furthermore, a further embodiment is shown in which a further predetermined deformation point 10c is formed in addition to or instead of the predetermined deformation points 10a and 10b. This predetermined deformation point 10c extends over the entire length 1 of the insulating element 10 and likewise opens into the bores 10d and 10e.

According to FIG. 6, the insulating element 10 is formed as a thin plastic plate with a thickness of only 0.92 mm. This plastic panel 10 is fastened by means of two aluminum beads 60 , 61 which are molded onto the base 3 and rest against the plastic panel 10 by means of clamping seats. In particular, the longitudinal edges 601 , 611 at the free ends of the beads 60 , 61 bear against the plastic sheet 10 in a clamped manner. The predetermined deformation points of the plastic sheet 10 thus extend along the beads 60 , 61 and in particular along the longitudinal edges 601 , 611 at the free ends of the beads 60 , 61 . The contact pins 7 , 8 protrude through breaks in the plastic plate 10 . If a force of greater than 80 N acts on the plastic plate 10 when the lamp base 3 is unscrewed from the lamp base, the plastic plate 10 snaps off along one or two predetermined deformation points 601 or 611 .

Claims (15)

1. A base for an electric lamp (1, 1') having outwardly extending electrical contact pins (7, 8) for making electrical contact with said lamp (1, 1'), said contact pins (7, 8) are separated and electrically insulated from each other by an insulating element (10), and said contact pins (7, 8) are mechanically connected to said insulating element (10), characterized in that said insulating element (10 ) is formed from a plastic sheet with a thickness of less than 1 mm, and the insulating element (10) is constructed such that it deforms under the action of a force of greater than 80N. 2. The base according to claim 1, characterized in that the insulating element (10) has at least one predetermined deformation position (10a, 10b, 10c). 3. The base according to claim 2, characterized in that the predetermined deformation positions (10a, 10b, 10c) extend over the entire width (b) of the insulating element (10). 4. The base according to claim 2 or 3, characterized in that the predetermined deformation positions (10a, 10b, 10c) extend over the entire length (1) of the insulating element (10). 5. The base according to claim 2, characterized in that the insulating element (10) has through holes (10d, 10e), wherein the contact pins (7, 8) respectively extend through the holes (10d, 10e) and The predetermined deformation positions (10a, 10b, 10c) lead to holes (10d, 10e) respectively. 6. The base according to claim 2, characterized in that the insulating element (10) has a thickness (d) of less than 1 mm. 7. Susceptor according to claim 6, characterized in that the insulating element (10) has a thickness (d) of less than 0.8 mm. 8. The base according to claim 2, characterized in that the predetermined deformation locations (10a, 10b, 10c) are formed as recesses in the insulating element (10). 9. Susceptor according to claim 8, characterized in that said predetermined deformation locations (10a, 10b, 10c) have a depth between 0.05 mm and 0.15 mm. 10. The base according to claim 2, characterized in that the predetermined deformation position (10a, 10b, 10c) is a predetermined breaking position. 11. The base according to claim 2, characterized in that, the predetermined deformation position (10a, 10b, 10c) is a predetermined bending position. 12. The base according to claim 1 or 2, characterized in that the predetermined deformation position extends along the clamping portion (60, 61). 13. The base according to claim 12, characterized in that, the predetermined deformation position extends along the curling edge (60, 61), and the curling edge (60, 61) is tightly attached to the on the insulating element (10). 14. Base according to claim 1 or 2, characterized in that the contact pins (7, 8) are fixed in the broken or bent state of the insulating element (10). 15. The base according to claim 1 or 2, characterized in that the insulating element (10) is arranged in a recess (9a) on the outer side of the housing (9) of the base (3).

Images