TWM573907U - Power socket for vehicle/ship - Google Patents

Abstract

The utility model provides a power socket for a vehicle/ship. The power socket for a vehicle is composed of a socket main body, an annular elastic body, and a cover member, and the socket main body includes a two-stage cylindrical structure having a first cylindrical hole that forms a threaded portion on the outer circumferential surface and serves as a plug insertion hole; a shallow second cylindrical hole on the concentric side in the outer circumferential direction from the opening end of the first cylindrical hole, the cover member including a thread portion formed on the inner circumferential surface to be screwed with the threaded portion of the socket main body and having a diameter a second cylindrical bore having the same size and being coaxial on the third cylindrical bore, the annular elastomer comprising a compression structure disposed between the second cylindrical bore and the third cylindrical bore, with the cover member Rotate for screwing forward compression and movement.

Description

Vehicle/ship power socket

The utility model relates to a power socket for a vehicle/ship.

In the past, when a vehicle such as a portable navigation device, a driving recorder, or a radar detector is installed in a vehicle such as a car or a large motorcycle, the plug of the vehicle electrical device is inserted into a power socket (cigarette outlet) for the vehicle. Get power from the vehicle's power source (battery).

Since the power distribution cannot be satisfied by using only the power outlet of the standard equipment in the vehicle, the power socket with the extension cable is sold and widely used. In the related power socket, as in Patent Document 1 or Patent Document 2, a power socket with a locking mechanism is proposed for preventing the disconnection when the plug is inserted.

In the locking mechanism of all the documents, the socket main body is a structure in which a notch is provided on the outer peripheral portion of the opening side, and the outer peripheral surface of the plug and the socket are crimped by the radial contraction caused by the elasticity of the notch portion. . With this crimping and utilizing the friction between the socket and the plug, the plug insertion state is maintained to prevent the plug from coming off due to vibration or the like of the vehicle. Prior art literature

Patent Document 1 Japanese Utility Model Registration No. 3190274

Patent Document 2 Japanese Utility Model Registration No. 3205246

Problems to be solved by utility models

However, in the lock mechanism, the friction generated by the contact between the plug and the socket main body portion is utilized, and therefore the frictional force against the plug drop may not be sufficiently exhibited.

In addition, due to the gap between the members, the entry of water and dust may cause contact failure between the plug and the electrode portion in the socket. On the other hand, if the structure of the socket is complicatedly formed by providing a notch, the strength may be affected and the over-pressure may not be tolerated.

In view of the above problems, an object of the present invention is to provide a power socket which is easy to insert and release a plug, and reliably prevents the plug from falling off due to vibration and impact of the vehicle, and has sufficient durability and dustproofness. And waterproof. Technical solutions for solving technical problems

In order to achieve the above object, a power socket for a vehicle according to a first aspect of the invention is composed of a socket main body, an annular elastic body, and a cover member, the socket main body including a two-stage cylindrical structure having a first cylindrical hole that forms a first threaded portion on the outer peripheral surface and serves as a plug insertion hole; and a shallow second cylindrical hole that is concentric on the outer circumference from the opening end of the first cylindrical hole.

The cover member includes a third cylindrical hole having a second threaded portion that can be screwed with the first threaded portion of the socket body and having the same size as the second cylindrical hole and being coaxial on the inner peripheral surface.

The annular elastic body is disposed between the second cylindrical hole and the third cylindrical hole, and has a movable state of being screwed forward and compressed in accordance with rotation of the cover member in a state where the socket main body and the cover member are screwed together. The amplitude includes a structure that generates friction between the annular elastomer and the plug.

The utility model related to claim 2 has the following feature: the annular elastic body is formed with a slit groove or a depression on the outer circumferential surface or the inner circumferential surface, so that the deformation expansion associated with the elastic deformation of the elastic body occurs slowly, so that the cover The rotation of the components is smooth.

According to a third aspect of the invention, the end surface portion or the two end surface portions of the annular elastic body are in the shape of a truncated cone which is inclined toward the axial direction, and the side of the end surface portion in the shape of a truncated cone is arranged. The bottom of the second cylindrical hole or the third cylindrical hole is a conical bevel shape that is in surface contact with the shape of the truncated cone, and includes a structure that generates a strong frictional force.

The related art of claim 4 includes a structure in which a socket positive electrode member that is in contact with the positive electrode portion of the plug is formed in a concave shape, thereby improving stability of electrode contact. Utility model effect

According to the present invention, the elastic deformation of the annular elastic body and the outer peripheral surface of the plug generate a strong frictional force, and the frictional force stably maintains the mounted state of the plug. Thereby, it is possible to reliably prevent electrical contact failure caused by the falling of the plug or the movement in the falling direction caused by the vibration of the vehicle.

Further, since the elastic deformation improves the adhesion between the members, high dustproofness and water repellency can be achieved, and deterioration of the electrode contact portion can be suppressed. In addition, the smooth crimping operation facilitates the insertion and release of the plug, and can suppress the damage or breakage of the member and improve the durability. Since the ship has the same power supply mechanism as the vehicle, it can also be applied and waterproof when the electronic device is additionally mounted on the ship.

<Outline> The present invention is characterized in that the annular elastic body has a simple compression structure and an annular elastic body shape which are appropriately elastically deformed. The embodiment will be described with reference to FIGS. 4(a) and 4(b) to 6(a) to 6(d) as shown in FIGS. 1 to 3(a) to 3(d). In addition, FIGS. 1 and 2 are shown in a manner including all the features related to the embodiments described later.

<Configuration> The power socket for a vehicle is composed of the socket main body 10, the cover member 20, and the annular elastic body 30, and the plug 40 of the electric device for the vehicle passes through the cover member 20 and the annular elastic body 30, and is inserted into the socket main body 10, The cover member 20 is rotated to screw the plug 40 of the electric device for a vehicle to the socket body.

The socket main body 10 is a bottomed cylindrical body made of an insulating resin, and includes a two-stage cylindrical structure having a threaded portion 11 (outer thread) formed on an outer peripheral surface and serving as a plug insertion hole. a first cylindrical hole 12; and a shallow second cylindrical hole 13 on the concentric side in the outer circumferential direction from the opening end of the first cylindrical hole 12.

The cover member 20 has a plug opening for inserting the plug 40, and includes a cover thread portion 21 (internal thread) which is screwed into the socket thread portion 11 on the inner circumferential surface and has a diameter and a second cylindrical hole 13 a third cylindrical bore 22 of the same size and on the concentric core.

The annular elastic body 30 is disposed between the second cylindrical hole 13 and the third cylindrical hole 22, and the annular elastic body 30 is compressed as the cover member 20 rotates and the screwing advances (hereinafter, omitted Compressed forward for screwing).

Here, the annular elastic body 30 has an annular thickness having an inner diameter substantially the same as the diameter of the first cylindrical hole 12 and an outer diameter substantially equal to the diameter of the second cylindrical hole 13. Since it is an elastic body, even if the size changes, the interference is small, and the size of the gap for absorbing the deformation expansion related to the elastic deformation described later may be slightly smaller than the arrangement space.

In the state in which the socket main body 10 and the cover member 20 are screwed together, the socket end side portion 16 and the cover portion end portion 23 at the bottom of the cover member member are not in contact with each other (i.e., By tightening the threads, the annular elastic body 30 has a compression and a reduced amplitude L (Fig. 2, which is omitted for the screwing forward movable amplitude).

The plug negative electrode 41, which is typically spring-elastic, is in contact with a metal grounding ring 15 mounted on the inner surface of the cylinder of the first cylindrical bore 12 of the socket body 10, and has a plug-shaped positive electrode with a spring-structured front end. The portion 42 elastically urges and contacts the socket positive electrode member 14 at the bottom of the socket body 10 to receive supply of electric power. In the bottom of the socket main body 10, an electric wiring member connected to the grounding ring 15 and the socket positive electrode member 14 is provided, and is led out from the bottom of the socket main body 10 to the outside, and is connected to a vehicle power source (battery).

<Selection of Elastic Material> The material of the annular elastic body 30 is a rigid ethylene propylene diene rubber which is widely used as an industrial rubber product, in consideration of a friction coefficient, durability, weather resistance and the like. Although a variety of elastic materials exist, it is also possible to consider the characteristics of the elastomer based on the use of the present, and to select other types of materials according to experimental trials.

Hereinafter, the features of the respective embodiments and their functions will be described. Example 1

In this example, the annular elastic body 30 is an embodiment having a rectangular shape as shown in Fig. 3(a). 4(a) to 4(b) are enlarged views of a main portion A of the compression structure of Fig. 2. In this example, the end face of the annular elastic body 30 that abuts against the cover member 20 is vertical, and the opposite socket main body side is also vertical (Fig. 4(a)).

The annular elastic body 30 is compressed and applied by the screwing forward compression by the arrangement state before compression in Fig. 4(a), and is elastically deformed as shown in Fig. 4(b).

At the initial stage of the screwing forward compression, the vertical resistance from the opposite side becomes a counter force, which is equal to the internal stress of the elastic body (black arrow in Fig. 4(b)), and simultaneously deforms and expands the gap between the buried members. Further, the compressive force W corresponds to the vertical resistance from the compression surface for the elastic rebound caused by the screw forward compression.

When the screwing forward compression is further applied, the deformation expansion related to the elastic deformation is suppressed by the cover wall member 20 and the inner wall surface of the socket main body 10, and the resistance received from the wall surface is equalized with an increase in the internal stress. Further, in the example of FIG. 4(b), the screw forward advancing amplitude L shows the reduction width of one rotation of the thread, and L can be changed in design within a range in which an appropriate amplitude is secured.

Here, the deformation expansion on the annular inner surface side of the annular elastic body 30 enlarges the area in contact with the outer peripheral surface of the plug, and applies pressure related to an increase in internal stress to the outer peripheral surface of the plug. The pressure is such that the annular elastic body 30 having a high coefficient of friction is combined with the expansion of the crimping area to cause a frictional force with the outer peripheral surface of the plug. The plug is stably held by a structure that generates friction between the annular elastic body and the plug.

On the other hand, the deformation expansion of the annular outer peripheral side is guided toward the gap between the plug end side portion 16 and the cover end edge portion 23, and is generated largely due to stress concentration (Fig. 4(b)). The corner portion 24 of the cover member 20 slides with each other while being engaged with the strained expansion phase, and is screwed forward. However, if the deformation expansion is increased, the engagement force of the corner portion 24 is also increased, and the limit of the cover member 20 that cannot be screwed forward may be reached. Although it is considered that the adjustment of the reduction of the movable width L, the selection of the elastic material, and the like can be eliminated, there is a problem that the compression of the screw forward is restricted.

[Embodiment 2] In the present embodiment, as shown in Fig. 3 (b), a square-shaped slit groove 31 (hereinafter, simply referred to as a slit groove) is formed in the width direction of the outer peripheral surface of the annular elastic body. . An example in which eight slit grooves are formed in the width direction is shown.

According to the present shape, although not shown, (1) the deformation expansion in the outer circumferential surface direction of the annular elastic body 30 is guided and directed toward the inner surface of the slit groove 31, thereby being moderated. (2) The corner portion 24 of the cover member does not engage with the groove portion, and the engagement force itself is also weak. (3) The volume of the annular elastic body 30 in the compression direction becomes small to lower the elastic rebound. As a result, the screw forward compression is also gentle.

According to the above-described action, compared with the annular elastic body of the rectangular parallelepiped section of the first embodiment, the screwing forward compression becomes smooth and the effect of good compression adjustment is obtained.

The number and size of the slit grooves 31 can be changed, and a shape such as a semi-cylindrical shape can be employed even if it is not a square shape. Fig. 6(a) shows a modification of the annular elastic body 30, and the outer peripheral surface of the annular elastic body 30 has a concave shape. Alternatively, it may be partially formed on the outer peripheral surface. The associated depression moderates the deformation expansion to obtain the same effect as described above.

Further, in consideration of the stress concentration at the bottom portion of the recess, it is preferable from the viewpoint of durability that the slit groove is formed in the width direction from the end surface of the annular elastic body 30. Even if the slit groove 31 is formed on the inner peripheral surface side of the annular elastic body 30, the same operational effects as described above can be obtained. However, since the gap groove on the inner peripheral surface has a gap with the outer peripheral surface of the plug, the dustproof property or the waterproof property is better when the slit groove is formed on the outer peripheral surface.

Further, in the corner portion 24, even if a cut-out angle or a circular arc shape is employed, the engagement force with the deformation expansion can be weakened (FIG. 6(b)).

[Embodiment 3] The present embodiment is characterized in that, as shown in Fig. 3(c), the elastic end surface portion 32 of the annular elastic body 30 is formed in a truncated cone shape inclined in the axial direction, and the cover member 20 is disposed. The bottom of the three-cylindrical hole is formed into a conical bevel shape that faces the truncated cone shape.

5(a) and 5(b) are schematic views showing the operation of the present embodiment, and Fig. 5(a) shows an arrangement state of the annular elastic body 30 before compression. Here, the compressive force W (FIG. 5(b)) generated by the screw forward compression is applied to the inclined surface of the elastic end surface portion 32, and is decomposed into the horizontal force w2 and the normal direction force w1 with respect to the slope. The compressive internal stress generated by the forces w1, w2 causes the deformation to expand while filling the gap between the members.

The deformation expansion completely buryes the gap between the outer peripheral surface of the plug 40 and the annular elastic body 30, so that the annular elastic body 30 abuts against the outer peripheral surface of the plug 40. In the abutting surface, the force w1 can be decomposed into a force y in the vertical direction and a force x in the horizontal direction (Fig. 5(b)), and the pressure corresponding to the y is directly applied to the outer peripheral surface of the plug, so that the plug 40 A strong frictional force is generated between the outer peripheral surface and the annular elastic body 30. Thereby, the plug insertion state can be more stably maintained.

Fig. 3(d) shows the shape of the annular elastic body including the features of the first, second, and third embodiments, and is optimal. Further, the third embodiment is an example in which the elastic end surface portion 32 having a truncated cone shape is disposed on the side of the cover member 20. Even if the elastic end surface portion 32 having a truncated cone shape as shown in Fig. 6(c) is disposed on the second cylindrical hole 13 side of the socket main body 10, or the elastic end surface of the truncated cone shape as shown in Fig. 6(d) The both ends of the portion 32 are in the shape of a truncated cone, and the same operational effects as described above can be obtained.

Embodiment 4 In this example, the socket positive electrode member 14 has a concave shape. (Figure 1, Figure 2). The contact area with the positive electrode portion 42 of the plug is enlarged, so that the electrical contact failure is lowered. A rivet-shaped metal member is preferred.

In the screw forward compression, when the annular elastic body 30 is compressed and contracted and brought into close contact with the outer peripheral surface of the plug 40, it acts in the direction in which the plug 40 is pressed. Although the positive electrode portion of the plug rebounds in the direction of press-fitting due to the elastic biasing force, the friction with the outer peripheral surface of the plug 40 in the close contact state becomes resistance to the rebound, and the positional deviation of the positive electrode portion of the plug is suppressed to make the electrical contact good. Reduced contact errors caused by hand shake during installation.

As shown in the above embodiment, in addition to the effect that the elastic deformation causes the friction to occur to maintain the plug insertion, the gap between the socket main body 10, the cover member 20, and the plug 40 is elastic in the ring shape in the cylindrical hole into which the plug is inserted. The elastic deformation of the body 30 is eliminated to achieve high water repellency and dust resistance.

Further, even if the excessive screwing forward compression is absorbed by the elastic deformation, physical damage (damage, breakage, etc.) of the member can be reduced to improve durability. Moreover, since the socket main body 10 does not require complicated molding because it has a simple structure with a small number of components, it is possible to reduce the manufacturing cost.

<Measurement Pulling Force> In the experiment of comparing the pull-out force of the plug related to the test piece and the similar product of the present invention, it was confirmed that the similar product was about 70 to 100 N and the trial work was about 150 N. In addition, the test piece is applied with a slit groove 31 and a truncated cone-shaped elastic end surface portion 32 as shown in Fig. 3 (d), and a torque of 80 to 90 N is applied to the insertion fastening of the plug, and the extraction rate is 2 mm. /s. Three types of plugs were selected, and the measured value of the pull-out force was an average of three types. The pull-out force of similar products differs depending on the type of plug, and the test works show stable values.

In addition, the outer shape of the socket main body 10 and the cover member 20 is not limited to a cylindrical shape, and can be freely designed and changed into a polygonal tube shape or the like, and a concave-convex shape or the like may be formed on the outer peripheral surface. Non-slip parts.

10‧‧‧Socket body

11‧‧‧ socket thread

12‧‧‧First cylindrical hole

13‧‧‧Second cylinder hole

14‧‧‧Socket positive component

15‧‧‧ Grounding ring

16‧‧‧ Socket end

20‧‧‧cap components

21‧‧‧ Thread part of the cover

22‧‧‧ Third cylindrical hole

23‧‧‧ hood end

24‧‧‧ corner

30‧‧‧Aperture Elastomer

31‧‧‧Gap sulcus

32‧‧‧ Elastomeric facial face

40‧‧‧ plug

41‧‧‧The negative part of the plug

42‧‧‧plug positive part

A‧‧‧ main part of the compression structure

W‧‧‧Compressive force

W1‧‧‧ The force in the normal direction after W is decomposed

x‧‧‧The force in the horizontal direction after decomposing w1

y‧‧‧The force in the vertical direction after decomposing w1

W2‧‧‧The force in the direction of the slope after decomposing W

L‧‧‧Compressed movable range

Fig. 1 is an exploded side view showing an embodiment in which a plug is inserted and placed in standby. Fig. 2 is a cross-sectional side view showing a state in which the plug is inserted. 3(a) to 3(d) are a front view and a side view of each embodiment of the annular elastic body, wherein Fig. 3(a) is a view showing the shape of the first embodiment, and Fig. 3(b) is a view showing FIG. 3(c) is a view showing a shape of the third embodiment, and FIG. 3(d) is a view showing a shape including the features of the first to third embodiments. 4(a) and 4(b) are enlarged schematic views of essential parts of the compression structure of A of Fig. 2 relating to the first and second embodiments, wherein Fig. 4(a) shows an annular elastic body having a rectangular parallelepiped shape. FIG. 4(b) is a view showing a state in which the elastic deformation after the screwing forward compression is performed. 5(a) and 5(b) are enlarged views of the main part of the compression structure of A of Fig. 2 related to the third embodiment, wherein Fig. 5(a) shows the annular elasticity of the end face having a conical shape. FIG. 5(b) is a view showing a state in which the body is elastically deformed after the screwing is compressed. 6(a) to 6(d) are schematic cross-sectional views showing main parts of a compression structure according to a modification of the present invention, and Fig. 6(a) is a view showing an example of an annular elastic body having a concave-shaped cross section. Fig. 6(b) is a view showing an example of a cover member having no corner portion, and Fig. 6(c) is a view showing a ring-shaped elastic end surface portion having a truncated cone shape disposed on the second cylindrical hole side of the socket main body side. FIG. 6(d) is a view showing an example of a form in which the truncated cone shape is formed on both end faces of the annular elastic body.

Claims (6)

A power socket for a vehicle/ship, the power socket for a vehicle comprising a socket body, an annular elastic body and a cover member, wherein the socket body comprises a two-stage cylindrical structure, the two-stage cylindrical structure has a first cylindrical hole that forms a first threaded portion on the outer peripheral surface and serves as a plug insertion hole; and a second second cylindrical hole that is concentrically in a peripheral direction from the open end of the first cylindrical hole, The cover member includes: a third cylinder having a second threaded portion that can be screwed with the first threaded portion of the socket body on the inner circumferential surface and having the same size as the second cylindrical hole and being coaxial a hole, the annular elastic body being disposed between the second cylindrical hole and the third cylindrical hole, having an inner diameter substantially the same as a diameter of the first cylindrical hole and substantially the same as a diameter of the second cylindrical hole The outer diameter of the size has a movable width that is screwed forward and compressed in accordance with the rotation of the cover member in a state where the socket main body and the cover member are screwed together. The power socket for a vehicle/ship according to the first aspect of the invention, wherein the annular elastic body has a slit groove or a recess formed on an outer circumferential surface or an inner circumferential surface. The power socket for a vehicle/ship according to the first or second aspect of the invention, wherein the one end surface portion or the two end surface portions of the annular elastic body are in the shape of a truncated cone inclined in the axial direction, and are arranged. The bottom of the second cylindrical hole or the third cylindrical hole on the side of the truncated cone shape is a conical bevel shape that faces the truncated cone shape. The power socket for a vehicle/ship according to claim 1, wherein the socket positive electrode member that is in contact with the positive electrode portion of the plug has a concave shape. The power socket for a vehicle/ship according to the second aspect of the invention, wherein the socket positive electrode member that is in contact with the positive electrode portion of the plug has a concave shape. The power socket for a vehicle/ship according to the third aspect of the invention, wherein the socket positive electrode member that is in contact with the positive electrode portion of the plug has a concave shape.