TWI731642B - Diagonal tension structure of closed blade conductive contact piece - Google Patents

Abstract

An obliquely stretched elastic structure of a closed blade conductive contact piece, comprising at least one obliquely stretched elastic structure arranged between the contact piece and the connecting piece, the top ends of which are mutually joined to have a highest point, and the bottom end of the elastic arm is connected to a contact piece. The connecting pieces are joined to each other to have a displacement point that can move up and down, and the support arm can extend upwards from the connecting piece to be higher than the displacement point; an inward force turning point is set on the support arm, when the external insert blade is inserted into the closed socket At this time, the displacement point of the contact piece is displaced outward due to the stretching action of the oblique tension elastic structure, which changes the angular extension of the three included angles. At this time, the displacement point of the contact piece is raised, and its horizontal extension is still lower than the inward The turning point of the strength forms an elastic clamping force in the inward direction; and when the external insert blade is pulled out, due to the retraction effect of the oblique tension elastic structure, the angle of the three included angles produces a retractive force of contraction, thereby making the contact piece The displacement point rebounds to the initial position. Accordingly, a stable clamping force of the contact sheet can be provided, and the clamping force will not be lost due to material loss, and the conductive area can maintain good contact.

Description

Diagonal tension structure of closed blade conductive contact piece

The present invention relates to a socket component, in particular, the contact piece is provided with an elastic structure to withstand the repeated insertion and extraction of the insert blade, thereby meeting the safety standards of a closed-type insert blade conductive sheet obliquely tensioned elastic structure.

According to the main structure of the conventional socket or power extension cord socket 30, as shown in Figure 1A, it generally includes an upper shell 31 combined with a lower shell 32, and a power cord 33 is provided at one end, which is then passed through an overload protection switch 34 It is electrically connected to the plurality of metal electrode plates 35, so that the plurality of unit sockets on the surface provide the insert blades (not shown in FIG. 1) of the plugs of electrical appliances.

Fig. 1B is a perspective view showing the appearance of a conventional insert blade conductive sheet, and Fig. 2A is a cross-sectional view of 2A-2A in Fig. 1B. The position of the metal electrode sheet 35 relative to the inserting blade 20 of the plug is provided with an insertion hole 352, and the insertion hole 352 is formed by stamping and forming a protrusion 351 on the metal electrode sheet 35, as shown in FIG. 2A The jack 352 is formed by corresponding protruding pieces 351 on both front and rear sides. 3A shows that the socket 352 is formed by a single-sided stamping and forming a tab 351, but regardless of the type, the gap (B) between the two sockets 352 is the same, so that the insert blade 20 can be inserted It forms effective contact with the inner surfaces of the protruding piece 351 and the metal electrode piece 35, and is electrically connected to conduct electricity.

However, it is found that the closed socket 352 of the metal electrode plate 35 of the prior art is a substrate deformation clamping structure, which uses the deformation of the metal substrate to generate a clamping force. The principle is that when the external insert blade 20 enters the closed socket 352 At this time, the original shape of the metal electrode sheet 35 is deformed by the size of the outer insert 20. The disadvantage is that the initial clamping force is too large and the conductive area is small, which makes the material wear fast. If the material is cut too much, the insulation distance will be insufficient, and it is easy to cause a short circuit.

Moreover, in accordance with safety standards, the enclosed socket 352 is in contact with the insert blade 20 and must be wear-resistant for more than 5000 times. However, the structural design of the conventional protruding piece 351 is not elastic. Less than 5000 times, the inner surfaces of the protruding piece 351 and the metal electrode piece 35 will be worn by the insert blade 20, and a recess 353 of a length (A) is formed as shown in FIGS. 2B and 3B. At this time, the closed When the socket 352 is in contact with the insert blade 20 again, slack is gradually generated and the clamping force is insufficient. Therefore, it is easy to cause poor electrical contact, easy to fall off, and thus cause a lack of safety.

The reason is that the main purpose of the present invention is to provide a diagonal elastic structure on the closed blade conductive contact piece, so that the conductive contact piece can provide a stable clamping force without material loss. Loss, excessive cutting and blanking cause short circuit risk, and the conductive area can maintain good contact, which effectively improves and solves the problems of the prior art.

To achieve the above objective, the technical means adopted by the present invention include: a metal electrode sheet, on the substrate of which at least a U-shaped protruding sheet is stamped and formed to form a closed socket for electrical connection of the external blade; When the protruding sheet is stamped and formed, its two sides are connected to the substrate of the metal electrode sheet by a connecting sheet each, and a contact sheet is formed at the center of the protruding sheet; it is characterized by: at least one diagonal tension structure , Is set between the contact piece and the connecting piece, the diagonal elastic structure is a mountain-shaped convex body with an elastic arm on the inner side and a support arm on the outer side, and the elastic arm and the top end of the support arm are connected Mutual joints have a highest point (A) on the outer side of the closed jack, and the inner side of the joint of the two arms forms a first included angle (a), and the protrusion height (h1) of the diagonal elastic structure needs to be greater than the The thickness of the substrate (t1), and the bottom end of the elastic arm and the contact piece are joined to each other to have a displacement point (B) that can move up and down, and the height (h2) of the displacement point (B) is smaller than the outer insert blade Thickness (t2), and the outer horizontal extension line of the contact piece and the bottom end of the elastic arm form a second included angle (b), and the support arm can be extended upward by the connecting piece higher than the displacement point (B ), and the bottom end of the connecting piece and the inner side of the connection point (C) of the substrate form a third included angle (c); and an inward force turning support structure, which is attached to the support arm to increase The elastic support strength of the oblique elastic structure makes the strength turning point (B+) height on the support arm rise to a height exceeding the highest displacement point (Bmax), and then changes the direction of the elastic force to become an inward and downward elastic force; , When the external insert blade is inserted into the closed socket, the displacement point (B) of the contact piece is displaced outward by the stretching action of the oblique elastic structure, so that the first included angle (a) , The second included angle (b) and the third included angle (c) change in angular extension, so that the contact piece forms an inward clamping force on the outer insert blade; and when the outer insert blade is pulled out, the Under the contraction of the diagonal tension structure, the first angle (a), the second angle (b), and the third angle (c) will generate a contracting resilience force, which in turn causes the displacement point of the contact piece ( B) Rebound to the initial position.

According to the features of the foregoing disclosure, the inward force turning support structure may include: further punching the connecting piece to have at least one convex rib on the surface.

With the help of the front-discovered feature, the inward force turning support structure may include: making the width (W1) of the connection between the connecting piece and the substrate larger than the width (W2) of the connection between the support arm and the elastic arm.

With the help of the front-discovered feature, when the protruding sheet is stamped and formed, the bottom end of the connecting sheet on the two sides may further include an arched sheet with a vertical direction, which is like an arch bridge and is connected across the substrate of the metal electrode sheet. Down position.

With the help of the aforementioned feature, the protruding sheet can be formed by forming a plurality of protruding sheets adjacent to each other during the stamping and forming process.

With the help of uplifting technical means, the present invention uses the characteristics of the diagonal tension structure and the turning point of the inward force, and adopts a simplified diagonal tension (arch bridge) extension structure, so that when the external insert blade enters the closed jack, the The expansion effect and angular expansion change of the obliquely tensioned elastic structure cause the contact piece to form an inward clamping force on the outer insert blade; and when the outer insert blade is pulled out, the obliquely tensioned elastic structure shrinks Under the action, the angle produces a rebound downward pressure of contraction, and then the displacement point of the contact piece rebounds to the initial position. Accordingly, the present invention can provide a stable clamping force without loss of clamping force due to material loss, and the conductive area can maintain good contact, which effectively improves and solves the problems of the prior art.

The following description uses the drawings as an embodiment, but is not limited thereto. The present invention can be implemented in other embodiments, and the well-known steps or elements are not described in the details, so as to avoid unnecessary limitations on the present invention. . It should be noted that the drawings are for illustrative purposes only, and do not represent the actual size or quantity of the components. Some details may not be completely drawn in order to keep the drawings concise.

First of all, please refer to FIGS. 4A to 4D. The first possible embodiment of the present invention includes: a metal electrode sheet 10 on which at least a U-shaped protruding sheet 12 is stamped and formed on the substrate 11 to form an external The plug blade 20 is electrically connected to the enclosed socket 13. In this embodiment, the thickness of the external plug blade 20 is 1.4mm～1.6 mm, and the width W of the external plug blade 20 is 6mm～8mm. Generally, the gap is 1.2 mm to 1.3 mm, but it is not limited to this. When the protruding sheet 12 is stamped and formed, its two sides are connected to the substrate 11 of the metal electrode sheet 10 by a connecting strip 121, and a contact strip 122 is formed at the center of the protruding sheet 12; and the metal electrode The thickness of the substrate 11 of the sheet is ≧0.4 mm. If the thickness of the substrate 11 is less than 0.4 mm, it is not conducive to the subsequent stamping and forming, and cannot achieve the feature of the present invention to stamp an elastic structure on the tab 12. However, it is found that the composition of the disclosure is prior art and is not the subject of the patent in this case, so I won’t repeat it.

The main feature of the present invention is that at least one oblique elastic structure 14 is arranged between the contact piece 120 and the connecting piece 121, and the oblique elastic structure 14 is a mountain-shaped convex body with an elastic arm inside it 142. There is a support arm 141 on the outside, and the top end of the elastic arm 142 and the support arm 141 are mutually joined to have a highest point (A) on the outer side of the closed socket 13, and the inner side of the joint of the two arms forms a The first included angle (a), the protrusion height (h1) of the diagonal elastic structure 14 needs to be greater than the thickness (t1) of the substrate 11, and the bottom end of the elastic arm 142 and the contact piece 122 are joined to each other to have a The displacement point (B) moves up and down. The height (h2) of the displacement point (B) is smaller than the thickness (t2) of the outer plunger 20, and the outer horizontal extension line of the contact piece 122 and the bottom of the elastic arm 142 The end forms a second included angle (b), and the supporting arm 141 can be formed by the connecting piece 121 extending upward and higher than the displacement point (B), and the connecting point ( The inside of C) forms a third angle (c).

An inward force turning support structure 15 is attached to the support arm 141 to increase the elastic support strength of the oblique tension elastic structure 14 so that the inward force turning point (B+) height on the support arm 141 is raised to more than The height of the displacement point (B) is because the horizontal axis (X) of the force turning support structure 15 is higher than the height of the highest position of the displacement point (Bmax) (shown by the dotted line in Fig. 4C), and the direction of elastic force becomes inward and downward pressure elastic force . As shown in FIG. 4D, in this embodiment, the strength steering support structure 15 includes: the support arm 141 is further punched to have at least one protruding rib 151 on its surface to enhance the strength of the support arm 141 , So that the strength turning point (B+) position can be raised higher than the highest position height of the displacement point (Bmax), and then turned into inward downward pressure. In addition, the inward force turning support structure 15 may also include: the width (W1) of the connection between the connecting piece 121 and the substrate 11 (that is, the connection point (C)) is greater than the connection between the supporting arm 141 and the elastic arm 142 The width (W2) is formed to enhance the strength of the support arm 141, so that the position of the strength turning point (B+) can be raised higher than the maximum height of the displacement point (Bmax), and then turned into downward pressure .

Accordingly, when the external insert blade 20 is inserted into the closed socket 13, the displacement point (B) of the contact piece 122 is displaced outward due to the stretching action of the oblique elastic structure 15, so that the The angle extension changes of the first included angle (a), the second included angle (b) and the third included angle (c), because the horizontal position of the highest displacement point (Bmax) does not exceed the inward force turning point (B+), which makes the contact The piece 122 forms an inward clamping force on the outer inserting edge 20; and when the outer inserting edge 20 is pulled out, under the contraction of the oblique tension structure 14, the first included angle (a), the second included angle The angles of the included angle (b) and the third included angle (c) generate a rebound downward pressure of contraction, which in turn causes the highest displacement point (Bmax) of the contact piece 122 to rebound to the initial displacement point (B) position.

It is known from the above embodiment that the closed socket of the metal electrode sheet in the prior art is a substrate deformation clamping structure, which uses the deformation of the metal substrate to generate a clamping force. The principle is that when the external insert blade enters the enclosed insert When making holes, the original shape of the metal electrode sheet is deformed by the size of the external insert blade. The disadvantage is that the initial clamping force is too large and the conductive area is small, which makes the material wear faster. If the material is cut too much, the insulation distance will be insufficient, which is easy Cause a short circuit

The present invention utilizes the technical features of the oblique tension elastic structure 14 and the inward force transition support structure 15, and adopts a simplified oblique tension (arch bridge) extension structure, so that when the external insert blade 20 enters the closed socket 13, the Due to the stretching action of the obliquely stretched elastic structure 15, the displacement point (B) of the contact piece 122 is displaced outward, so that the first included angle (a), the second included angle (b), and the third included angle (c) The angle extension changes. At this time, the displacement point (B) is displaced but its horizontal extension is still lower than the inward force turning point (B+) on the elastic arm, so that the contact piece 122 forms an inward direction to the outer plunger 20 The clamping force; and when the outer insert 20 is pulled out, under the contraction of the diagonal tension structure 14, the first included angle (a), the second included angle (b) and the third included angle (c) The angle generates a rebound downward pressure of contraction, and then the highest displacement point (Bmax) of the contact piece 122 rebounds to the initial displacement point (B) position. Accordingly, the present invention can provide a stable clamping force without loss of clamping force due to material loss, and the conductive area can maintain good contact, which effectively improves and solves the problems of the prior art.

Please refer to FIG. 5, which continues the above-mentioned embodiment. The second feasible embodiment of the present invention continues the technical features of the above-mentioned first embodiment. The same components are denoted by the same drawing numbers, and the difference lies in: the protruding piece 12 During the stamping and forming process, the bottom ends of the connecting pieces 121 on both sides further include an arched piece 120 with a vertical direction, which is connected to the upper and lower positions of the base plate 11 of the metal electrode piece 10 like an arch bridge. In this embodiment, the oblique tension elastic structure 14 is one, but it is not limited to this. Alternatively, as shown in FIG. 6, in the third feasible embodiment of the present invention, there are two oblique tension elastic structures 14.

Please refer to FIG. 7, which is a fourth feasible embodiment of the present invention. The same components as the above-mentioned embodiment are denoted by the same drawing numbers. In this embodiment, the protruding sheet 12 includes more than two during stamping and forming. The protruding pieces 12 are formed adjacent to each other and have at least three vertical arched pieces 120, which are connected across the upper and lower positions of the base plate 11 of the metal electrode piece 10 like three arch bridges, and the three arched pieces Two convex pieces 12 are formed between the pieces 120, that is, three arched pieces 120 are a group, and the middle arched piece 120 is shared by the two convex pieces, and the two diagonal elastic structures 14 are arranged separately At a position close to the left and right arch-shaped pieces 120, two H-shaped adjacently juxtaposed symmetrical shapes are present. Based on this structure, the protrusions 12 can be formed adjacent to each other as many as required, and each protrusion 12 is provided with at least a diagonal elastic structure 14.

Since the oblique elastic structure 14 of the present invention can solve the problem that the conventional insert blade 20 and the protruding piece 12 are hard and easy to wear, the present invention can withstand the external insert blade 20 plugging and unplugging more than 5000 times, thereby meeting the safety standards and improving the efficiency.

In summary, the technical means disclosed in the present invention are indeed "novel" and "progressive". For invention patent requirements such as "sexuality" and "available for industrial use", I pray that the Jun Bureau will grant patents to encourage invention without a sense of morality.

However, the drawings and descriptions disclosed above are only preferred embodiments of the present invention. Those who are familiar with this technique, modifications or equivalent changes made in accordance with the spirit of this case should still be included in the scope of the patent application in this case.

10: Metal electrode sheet 11: substrate 12: Tab 120: arched piece 121: connecting piece 122: contact piece 13: jack 14: Oblique tension elastic structure 141: Support arm 142: Flexible arm 15: Turning inward force to support structure 151: Convex Rib 20: External insert edge W: Width of external slot (w1): The width of the connection between the connecting piece and the substrate (w2): The width of the connection between the support arm and the elastic arm (A): Highest point (B): Displacement point (Bmax): highest displacement point (B+): Turning point of inward strength (C): Connection point (a): The first angle (b): The second included angle (c): The third angle (h1): The protrusion height of the diagonal tension structure (h2): height of displacement point (B) (t1): The thickness of the substrate (t2): The thickness of the external insert blade

Figure 1A: An exploded perspective view of a conventional power extension cord socket. Figure 1B: A perspective view of a conventional insert blade conductive sheet. Figure 2A: is a cross-sectional view of section 2A-2A in Figure 1B. Fig. 2B is a schematic diagram of the wear of the conductive sheet of the insert blade in Fig. 2A. Figure 3A: A cross-sectional view of a conventional insert blade conductive sheet. Fig. 3B is a schematic diagram of the wear of the conductive sheet of the insert blade in Fig. 3A. Fig. 4A is a perspective view of the appearance of the first feasible embodiment of the present invention. Figure 4B: is a cross-sectional view of section 4B-4B in Figure 4A. Figure 4C: is a schematic diagram of the extension of the oblique tension elastic structure in Figure 4B. Figure 4D: is a front view of the first feasible embodiment of the present invention. Fig. 5 is a perspective view of the appearance of a second feasible embodiment of the present invention. Fig. 6 is a perspective view of the appearance of a third feasible embodiment of the present invention. Fig. 7 is a perspective view of the appearance of a fourth feasible embodiment of the present invention.

10: Metal electrode sheet

11: substrate

12: Tab

120: arched piece

121: connecting piece

122: contact piece

13: jack

14: Oblique tension elastic structure

141: Support arm

142: Flexible arm

15: Turning inward force to support structure

151: Convex Rib

20: External insert edge

(A): Highest point

(B): Displacement point

(B+): Turning point of inward strength

(C): Connection point

(a): The first angle

(b): The second included angle

(c): The third angle

(h1): The protrusion height of the diagonal tension structure

(h2): height of displacement point (B)

(t1): The thickness of the substrate

Claims (5)

A closed-type insert blade conductive contact piece of diagonal tension elastic structure, including: A metal electrode sheet, at least a U-shaped protruding sheet is stamped and formed on the substrate to form a closed socket for the electrical connection of the external blade; When the protruding piece is stamped and formed, its two sides are connected to the substrate of the metal electrode piece by a connecting piece, and a contact piece is formed at the center of the protruding piece; it is characterized in that: At least one obliquely stretched elastic structure is arranged between the contact piece and the connecting piece. The obliquely stretched elastic structure is a mountain-shaped convex body with an elastic arm on the inner side and a supporting arm on the outer side, and the elastic arm The top end of the support arm is joined to each other to have a highest point (A) on the outer side of the closed socket, and the inner side of the joint of the two arms forms a first included angle (a), and the protrusion height of the diagonal elastic structure (h1) needs to be greater than the thickness of the substrate (t1), and the bottom end of the elastic arm and the contact piece are joined to each other to have a displacement point (B) that can move up and down, and the height of the displacement point (B) (h2) Is smaller than the thickness of the outer insert blade (t2), and the outer horizontal extension line of the contact piece and the bottom end of the elastic arm form a second included angle (b), and the supporting arm can be extended upward by the connecting piece. It is formed at the displacement point (B), and the bottom end of the connecting piece and the inner side of the connecting point (C) of the substrate form a third included angle (c); and An inward force turning support structure is attached to the support arm to increase the elastic support strength of the oblique tension elastic structure, so that the force turning point (B+) height on the support arm is increased to exceed the maximum displacement point (Bmax ) Height, and then change the direction of the elastic force into inward and downward pressure elastic force; According to this, when the external insert blade is inserted into the closed socket, the displacement point (B) of the contact piece is displaced outward by the stretching action of the oblique elastic structure, so that the first included angle ( a), the second included angle (b) and the third included angle (c) change in angular extension, so that the contact piece forms an inward clamping force on the outer insert blade; and when the outer insert blade is pulled out, Under the contraction of the diagonal tension structure, the first angle (a), the second angle (b), and the third angle (c) will generate a shrinking rebound pressure, which in turn causes the displacement point of the contact piece (B) Rebound to the initial position. As described in item 1 of the scope of patent application, the oblique tension elastic structure of the closed insert blade conductive contact sheet, wherein the inward force turning support structure includes: the support arm is further punched to have at least one protruding rib on the surface Constituted. As described in item 1 of the scope of patent application, the oblique tension elastic structure of the closed blade conductive contact sheet, wherein the inward force turning support structure includes: making the width (W1) of the connection between the connecting sheet and the substrate larger than the It is constituted by the width (W2) of the joint between the support arm and the elastic arm. As described in the first item of the scope of patent application, the oblique tension elastic structure of the closed insert blade conductive contact piece, wherein, when the protruding piece is stamped and formed, the bottom ends of the connecting pieces on the two sides further include a vertical arch The profile piece is connected to the upper and lower positions of the base plate of the metal electrode piece like an arch bridge. As described in item 4 of the scope of patent application, the oblique tension elastic structure of the closed insert blade conductive contact sheet, wherein the protruding sheet includes a plurality of protruding sheets formed adjacently and side by side during the stamping and forming process.

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