CN211238736U - Cigarette lighter plug reaches power supply wire, on-vehicle electronic equipment including it - Google Patents

Abstract

The utility model relates to a cigar lighter plug reaches power supply wire, on-vehicle electronic equipment including it. The head end of cigar lighter plug sets up the anodal contact that can retract, the side of cigar lighter plug sets up the negative pole contact that can retract, wherein, the cigar lighter plug only has a negative pole contact.

Description

Cigarette lighter plug reaches power supply wire, on-vehicle electronic equipment including it

Technical Field

The utility model relates to the technical field of automobile accessories; specifically, the utility model relates to a cigar lighter plug reaches power supply wire, on-vehicle electronic equipment including it.

Background

Generally, automobiles are equipped with a cigarette lighter socket and a cigarette lighter to facilitate the use of the cigarette by the occupants of the automobile. The cigarette lighter is one of the simplest in-vehicle electronic devices. In addition, the automobile cigarette lighter socket can also be used for providing power for other vehicle-mounted electronic equipment.

With the development of automobile accessory technology, the types of vehicle-mounted electronic devices that provide power through a cigarette lighter socket are increasing, and the common devices include, but are not limited to, a GPS, a vehicle-mounted refrigerator, a vehicle-mounted inflator, a car wash pump, and the like. The cigarette lighter plug is a device for supplying power from the cigarette lighter socket to these in-vehicle electronic devices.

As shown in fig. 1, a cigarette lighter plug 1 of the prior art is substantially cylindrical, and has a positive contact 2 at a head end, more than one negative contact 3 at a side surface along a circumferential direction, and a tail connecting wire 4. When the automobile cigarette lighter plug 1 is used, only the cigarette lighter plug 1 needs to be inserted into a cigarette lighter socket of an automobile, and then the positive contact head 2 and the negative contact head 3 are respectively in close contact with the inner positive electrode of the cigarette lighter socket and the inner wall negative electrode, so that the conversion output of the cigarette lighter socket power source through the cigarette lighter plug 1 can be realized.

For convenience of use, some power supply wires and vehicle-mounted electronic equipment are provided with the cigarette lighter plug.

SUMMERY OF THE UTILITY MODEL

It is an object of one aspect of the present invention to provide an improved cigarette lighter plug.

It is an object of another aspect of the present invention to provide an improved power supply lead.

It is yet another aspect of the present invention to provide for an improved in-vehicle electronic device.

In order to achieve the foregoing objective, one aspect of the present invention provides a cigarette lighter plug, the head end of cigarette lighter plug sets up the positive contact that can retract, the side of cigarette lighter plug sets up the negative contact that can retract, wherein, the cigarette lighter plug only has a negative contact.

Alternatively, in the cigarette lighter plug as described above, the positive wire and the negative wire of the cigarette lighter plug are introduced from the trailing end thereof, and the positive wire is connected to the positive contact by being pinched by the first metal piece, and the negative wire is connected to the negative contact by being pinched by the second metal piece.

Optionally, in the cigarette lighter plug as described above, the positive contact has an inner end located within the housing of the cigarette lighter plug, and a positive lead tab is provided at a periphery of the inner end, the positive lead being connected to the positive lead tab within the housing on a side remote from the negative contact.

Optionally, in the cigarette lighter plug as described above, a balancing protrusion is provided on a side of the cigarette lighter plug facing away from the negative contact.

Optionally, in the cigarette lighter plug as described above, the negative contact head includes an integral retaining base by which the negative contact head is fixed within the cigarette lighter plug, and a negative wire tab extending in a longitudinal direction of the cigarette lighter plug is provided at a distal end of the retaining base.

Optionally, in the cigarette lighter plug as described above, a gear structure for limiting the limiting base is provided inside the housing of the cigarette lighter plug.

Optionally, in the cigarette lighter plug as described above, the shell of the cigarette lighter plug is made up of two halves which form the shell by snap-fitting of at least four snaps.

Optionally, in the cigarette lighter plug as described above, the body of the positive contact is hollow.

In order to achieve the foregoing objective, another aspect of the present invention provides a power supply wire having a cigarette lighter plug as set forth in any one of the foregoing aspects at one end thereof.

In order to achieve the foregoing objective, a further aspect of the present invention provides an on-board electronic device having a cigarette lighter plug as defined in any one of the foregoing aspects.

Drawings

The disclosure of the present invention will be more apparent with reference to the accompanying drawings. It is to be understood that these drawings are solely for purposes of illustration and are not intended as a definition of the limits of the invention. In the figure:

FIG. 1 schematically illustrates a cigarette lighter plug of the prior art;

FIG. 2 schematically illustrates a side view of a cigarette lighter plug according to one embodiment of the present invention;

FIG. 3 schematically illustrates a cross-sectional plan view of the cigarette lighter plug of FIG. 2; and

figure 4 schematically illustrates a cut-away perspective view of the cigarette lighter plug of figure 2.

Detailed Description

The following describes in detail embodiments of the present invention with reference to the drawings. In the drawings, the same reference numerals indicate the same or corresponding features.

Fig. 2 schematically illustrates a side view of a cigarette lighter plug according to one embodiment of the present invention. As can be seen, the lighter plug 10 may be generally cylindrical with a head end designed with a taper adapted to guide insertion of the lighter plug 10. The end of the cigarette lighter plug 10 that is to be inserted into an automobile cigarette lighter socket is referred to herein as the head end thereof, and the opposite end thereof is referred to as the tail end.

The cigarette lighter plug 10 may be provided with a positive contact 11 at the head end and a negative contact 12 at the side. The positive contact 11 and the negative contact 12 are retractable so that, when the cigarette lighter plug 10 is inserted into a cigarette lighter socket on an automobile, they are pressed to retract toward the inside of the cigarette lighter plug, respectively. This facilitates reliable contact of the positive and negative contacts 11, 12 with the positive and negative poles in the cigarette lighter socket.

In the illustrated embodiment, the positive electrode contact 11 may be in the form of a nail (positive electrode nail), and the negative electrode contact 12 may be in the form of a sheet (negative electrode sheet). Please refer to the detailed description of fig. 3 and 4.

It is apparent from the figure that the illustrated cigarette lighter plug 10 has only one negative contact 12. Compared with the cigarette lighter plug provided with two or more negative contacts in the prior art, the cigarette lighter plug is provided with a single negative contact on one side, the used material consumption is small, and the manufacturing cost of the product can be effectively reduced.

As can also be seen in fig. 2, the balance projection 13 is provided on the cigarette lighter plug 10 on the side facing away from the negative contact 12, and the balance projection 13 has an axially symmetrical position and contour shape with respect to the negative contact 12. In an alternative embodiment, the balancing tab 13 may be an integral part of the housing of the lighter plug 10, and serves to balance the lighter plug 10 when inserted into the lighter socket of an automobile without tilting and localized wear, facilitating good electrical contact and extending the useful life of the lighter plug and socket.

The profile of the balancing protrusion 13 may be symmetrical to the profile of the negative contact 12 protruding outside the lighter plug 10. As shown in the drawing, the outline shapes of the balancing protrusion 13 and the negative contact 12 may each be an arc shape.

Also schematically shown in fig. 2 are a positive lead 14 and a negative lead 15 leading from the trailing end of the lighter plug 10, which positive 14 and negative 15 leads will be connected to the positive 11 and negative 12 contacts, respectively, after being introduced inside the lighter plug 10.

Figure 3 schematically illustrates a cross-sectional plan view of the cigar lighter plug of figure 2. Figure 4 schematically illustrates a cut-away perspective view of the cigarette lighter plug of figure 2.

As can be seen from fig. 3 and 4, in the illustrated embodiment, the positive wire 14 and the negative wire 15 are introduced from the rear end of the cigarette lighter plug 10 into the interior thereof, and, optionally, the positive wire 14 may be connected to the positive contact 11 by being pinched by the first metal piece 16, and the negative wire 15 may be connected to the negative contact 12 by being pinched by the second metal piece 17. It can be appreciated that the pinch-fit assembly using the metal sheet does not have the problems associated with cold solder, solder failure, etc., relative to the solder connections between the positive and negative contacts and the positive and negative leads of the prior art. In addition, the function of protecting the working environment relative to welding is also existed; some harmful substances may be generated in the air during the welding operation, and good ventilation needs to be prepared for the safety of the workers.

In particular, according to an alternative embodiment in the figures, the positive contact 11 may have an inner end located inside the housing 18 of the cigarette lighter plug 10 and provided at its periphery with a positive lead tab 19, to which the positive lead 14 may be connected inside the housing 18, on the side remote from the negative contact 12. Through the connection and the trend of the positive electrode lead, the positive electrode lead can be far away from the negative electrode contact, so that short circuit can be effectively reduced, and a shielding part does not need to be coated outside the positive electrode lead. In the cigarette lighter plug in the prior art, because the positive wire is located in the middle of the cigarette lighter plug, when the negative contact retracts towards the inside of the shell, the positive wire and the negative contact are easy to be short-circuited, a shielding part is coated outside the positive wire usually, and the short-circuit phenomenon is prevented.

To ensure the position and orientation of the positive conductor 14 within the lighter plug 10, a guide 24 is also provided on the housing 18 of the lighter plug 10. In the illustrated example, the guide means 24 are guide tabs integrally formed on the inside of the housing 18.

The body of the positive contact 11 is hollow. The lighter plug is beneficial to weight reduction, material consumption and cost reduction. For example, the positive contact 11 illustrated in the figures is in the form of a positive peg, the portion of which that protrudes beyond the lighter plug is a body, which may be hollow. As can also be seen from fig. 3 and 4, the inner end of the positive contact 11 is a flange portion to prevent the positive contact 11 from being detached from the positive hole of the housing 18. A holding bracket is provided in the positive electrode hole integrally with the housing 18, and one end of the compression spring abuts against the holding bracket and the other end abuts against the inner end of the positive electrode contact 11, thereby holding the positive electrode contact extending from the head end of the cigarette lighter plug.

In addition, according to an alternative embodiment in the figures, the negative contact 12 comprises an integral retaining base 20, the negative contact 12 being fixed inside the cigarette lighter plug 10 by the retaining base 20, and the end of the retaining base 20 being provided with a negative wire connector 21 extending in the longitudinal direction of the cigarette lighter plug 10. The setting of negative pole wire connector 21 is adjusted the whole positive pole contact direction skew of corresponding structure on negative pole contact and the cigar lighter plug effectively, is favorable to later stage assembly solidus cover. In prior art cigarette lighter plugs, the negative contact is typically too close to the tail end of the cigarette lighter plug, which can make post assembly of the wire retaining sleeve difficult.

The negative contact 12 in this embodiment may be selected as a negative plate. As can be seen from fig. 3, the negative electrode tab includes a free end portion, a bent protruding portion, a stopper base 20, and a negative electrode lead tab 21. When the negative pole piece bears the external lateral pressure, the free end part deflects towards the inside of the cigarette lighter plug, and the correspondingly bent extension part retracts towards the inside of the cigarette lighter plug. Since the retaining base 20 is fixed, the curved protrusion generates an outwardly extending spring force, facilitating electrical contact with the negative pole of the inner wall of the cigarette lighter socket.

In the illustrated embodiment, optionally, the housing 18 of the cigarette lighter plug 10 is provided inside with a catch structure 22, 23 that retains the retaining base 20, said catch structure 22, 23 may be integrally formed inside the housing 18. The gear structures 22, 23 include a first gear structure 22 and a second gear structure 23, the first gear structure 22 extends longitudinally along the shell of the lighter plug 10 toward the head end thereof, the second gear structure 23 extends in a direction opposite to the first gear structure 22, and the limiting base 20 is sandwiched between the first gear structure 22 and the second gear structure 23. When the negative pole piece retracts, the force applied to the gear structures 22 and 23 by the limiting base 20 is transmitted to the head end and the tail end of the shell. The arrangement of the gear structures 22 and 23 is particularly beneficial to the dispersed transfer of the force transmitted by the negative contact 12 to the vicinity of the tail end of the shell to the head end of the shell, so as to prevent the shell from being vertically staggered due to uneven stress.

The shell 18 of the lighter plug 10 may be formed of two halves that form the shell by snap-fitting of at least four snaps. The problem of looseness in assembly of the shell can be solved by buckling the shell by utilizing more buckles, and meanwhile, the assembly clearance is favorably reduced.

It will be appreciated that, based on the above description in connection with the cigarette lighter plug, the present application is also directed to a power supply wire including the cigarette lighter plug of the foregoing embodiments at one end, and an in-vehicle electronic device including the cigarette lighter plug of the foregoing embodiments.

The technical scope of the present invention is not limited to the above description, and those skilled in the art can make various modifications and alterations to the above embodiments without departing from the technical spirit of the present invention, and all such modifications and alterations should fall within the scope of the present invention.

Claims (10)

1. The cigarette lighter plug is characterized in that a retractable positive contact is arranged at the head end of the cigarette lighter plug, a retractable negative contact is arranged on the side face of the cigarette lighter plug, and the cigarette lighter plug is only provided with one negative contact.

2. The cigar lighter plug of claim 1, wherein the positive and negative leads of the cigar lighter plug are introduced from the trailing end thereof, and the positive lead is connected to the positive contact by being pinched by a first metal sheet, and the negative lead is connected to the negative contact by being pinched by a second metal sheet.

3. The cigar lighter plug of claim 2, wherein the positive contact has an inner end located within the housing of the cigar lighter plug and a positive wire connector is provided around the inner end, the positive wire being connected to the positive wire connector within the housing by a guide means guided past a side remote from the negative contact.

4. The cigar lighter plug of claim 1, wherein a balancing tab is provided on the cigar lighter plug at a side facing away from the negative contact, and the balancing tab has an axial symmetric position and profile with the negative contact.

5. The cigar lighter plug of claim 1, wherein the negative contact head includes an integral retaining base by which the negative contact head is secured within the cigar lighter plug and at the end of which is disposed a negative wire connector extending longitudinally of the cigar lighter plug.

6. The cigar lighter plug of claim 5, wherein the housing of the cigar lighter plug is provided with a detent structure on an inside thereof that limits the limit base, the detent structure comprising a first detent structure extending longitudinally along the housing of the cigar lighter plug toward the head end and a second detent structure extending in a direction opposite the first detent structure, the limit base being sandwiched between the first and second detent structures.

7. The cigar lighter plug of claim 1, wherein the shell of the cigar lighter plug is formed of two halves which form the shell by snap-fitting of at least four snaps.

8. The cigar lighter plug of claim 1, wherein the body of the positive contact is hollow.

9. A power supply lead having a cigarette lighter plug as claimed in any one of claims 1 to 8 at one end thereof.

10. An in-vehicle electronic device characterized in that the in-vehicle electronic device has the cigarette lighter plug according to any one of claims 1 to 8.

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