KR100320013B1 - Conversion lever switch - Google Patents

Abstract

The present invention rotates the front end of the lever protruding out of the casing downwards, so that the contact (a, b) and the fixed contact (e, f) from the contact conduction state (normally) of the contact (a, c) and the fixed contact (e, g) A conversion lever switch for converting a circuit into a contact conduction state of a power supply), wherein a U-shaped recess 4 is formed in a circular rotating portion 3 at a lower end thereof, and a male portion 4a, 4b is formed in the U-shaped recess 4. .4c) (or 4c ') and the lever 5 (or 5') which provided the engaging part 4d, are provided, while the contact (s, b) is attached to the upper plate of the U-shaped spring plate, and the contact ( c) U-shaped spring plate 6 having a mating spring plate d 'formed thereon, and the lever 5 (or 5') is installed to contact the spring portion lever 1 (or 1 '). The tip of the lever 5 (or 5 ') is projected out of the casing 8 along the axis so as to freely rotate in the casing 8 by a set angle, and at the same time, the contacts a and b are fixed in the upper part of the casing 8. Contact with contacts (e, f) (c) is a conversion lever switch A1 (or A2) configured to elastically approach the fixed contact g of the lower part, and the male part 4c of the lower side of the opening of the U-shaped concave part of the contact soup applying lever is the upper part. The non-short conversion lever switch A1 is formed by protruding longer than 4a, and the short part conversion lever switch A2 is formed by forming the male portion 4c 'approximately the same length as the male portion 4a. For this reason, an extremely small and high precision conversion lever switch can be installed by simply providing the contact spring lever in contact with the upper and lower fixed contacts in the casing so as to rotate freely at a set angle within the casing. It is characterized by being.

Description

Conversion lever switch

The present invention rotates the front end of the lever protruding out of the casing downward, and the contact (a, b) and the fixed contact (e, f) from the contact conduction state (normally) of the contacts (a, c) and the fixed contacts (e, g). Of a conversion lever switch for performing a circuit conversion in a contact conduction state of

The male portion 4c of the lower side of the opening of the U-shaped concave portion of the contact sprue portion lever is formed to protrude longer than the male portion 4a of the upper side, thereby providing a non-stationary type switching lever switch, and the male portion 4c 'is provided with the male portion 4a. By forming the same length, it is possible to provide a short-circuit type conversion lever switch.

Applicant has previously formed a circular rotary part at the lower end and a U-shaped concave part at the lower part of the circular rotary part by Japanese Patent Application No. 5-176114, "two-way switch", and the U-shaped contact spring piece is formed at the U-shaped concave part. When the shaft of the contact spring lever is integrated into the casing and an external force is applied from the right or left direction (two directions) to the tip of the lever, the contact spring lever is rotated to the left or right and compressed to the left and right fixed contacts in the casing. The two-way switch (normally switched on normally closed) was separated (switched off) and the restoring contact (switched on) was released when the external force was released.

The present invention relates to a conversion lever switch for converting a circuit by operating with an external force from one direction by applying the basic configuration of a two-way switch according to the above patent application, and in particular to change a part of the contact spring lever lever structure. It is simply to provide a conversion lever switch to configure a non-short conversion lever switch or a short conversion switch.

The non-short conversion lever switch has a moment of being energized instantaneously during the conversion process, while avoiding the harmful effects such as the occurrence of noise due to a short circuit during conversion, rather than the damage caused by interruption of energization of all circuits instantaneously. Suitable for equipment,

The short-circuit type conversion lever switch is suitable as a device for shortening the energized state of the entire circuit in the process of conversion and short-circuit.

However, the present invention makes it possible to easily provide both types of conversion lever switches in response to the above requirements, and to improve the versatility of the conversion lever switches.

`` Non-Shock Type Conversion Lever Switch ''

The present invention forms a circular rotating portion at the lower end, and forms a U-shaped concave portion which is opened downward in the circular rotating portion with the center axis or the center hole as the center, and the contact spring piece of the U-shaped spring piece at the upper side of the opening of the U-shaped recessed portion. The male portion 4a of (a) and the male portion 4b of the contact spring piece b 'are provided, and the lower portion of the opening protrudes 1.4 times longer than the male portion 4a, 4b of the upper side to protrude the contact spring piece c'. Mount lever 4c and the engagement spring piece d 'of the engagement projection of the engagement projection, and install the lever provided with the engagement portion 4d,

A contact spring piece (c ') having an upper end of the U-shaped spring piece branched into contact spring pieces (a', b ') each having a tip as a contact (a, b), and a lower piece having a tip as a contact (c) at the same time. A U-shaped spring piece branched into a spring fitting piece (d ')

Engage the engaging spring piece d 'of the U-shaped spring piece within the U-shaped recess of the lever to engage the engaging spring piece 4d, and simultaneously hold each contact spring piece a', b ', c'. (4a, 4b, 4c) in a state supported by integrally inserting and attaching the contact spring piece lever,

The contact spring part lever protrudes toward the upper right diagonal out of the casing and extends the contact point (a, b) across the axis so as to rotate freely around the right upper part of the casing by a set angle about its central axis. The contact c is elastically contacted with the fixed contact e and f at the upper part of the casing, and the fixed contact g with the lower part (normally, the circuit "ae-cg" is closed and "ae-bf" is opened). It is configured conversion lever switch,

The contact spring part lever rotates downward by the set angle with the external force from the upper side to the tip of the lever protruding out of the casing, and the lower side of the opening rotates upward to push up the contact spring piece c 'so that the contact point c is a fixed contact. Separate from (g), the upper side of the opening rotates upward and the contact spring piece (b) rises so that the contact (b) contacts the fixed contact (f) to convert the circuit (circuit "ae-cg" opens "ae-bf" is provided to close), and also to be restored to its original shape by the resilience of the U-shaped spring piece when removing the external force on the tip of the lever,

As described above, by protruding the male portion 4c of the lower side of the opening of the U-shaped concave portion by 1.4 times longer than the male portion 4a of the upper side, when the circuit is changed by the lower rotation and the restoration rotation of the contact spring portion lever, The male portion 4a rotates upward to raise the contact spring piece b 'so that the male portion 4c at the lower side of the opening pushes the contact spring piece c' before the contact b contacts the fixed contact f. Raise the contact (c) away from the fixed contact (g) so that the contacts (b, c) are instantaneously separated from the fixed contact (f, g), and the short circuit is provided so that the energization of all circuits is temporarily cut off completely. The problem is solved by the type conversion lever switch.

Short-circuit type conversion lever switch

In addition, the present invention forms a circular rotating portion at the lower end, and forms a U-shaped concave portion which is opened downward with the central axis or the center hole as the center, and the contact spring of the U-shaped spring piece on the upper side of the opening of the U-shaped concave portion A male portion 4a of the piece 3 'and a male portion 4b of the contact spring piece b are provided, and the engaging portion 4d of the engaging projection portion which protrudes longer than the male portion 4b of the upper side is provided at the lower side of the opening. A contact spring piece (a ') provided with a lever provided with a male part (4c') formed almost the same length as the male part (4a) of the upper side, and the upper side of the U-shaped spring piece having each tip as a contact (a, b); b ') and a U-shaped spring piece branched into a contact spring piece c' having a tip as the contact point c 'and a hanging spring piece d' at the same time.

The engagement spring piece d 'of the U-shaped spring piece is hooked into the U-shaped recess of the lever, and the contact spring piece a'b'c' is engaged with the engagement portion 4d, respectively. 4b, 4c '), and the contact spring lever is installed by inserting it integrally while supporting it.

The tip of the lever protrudes upwardly to the right diagonal out of the casing along the axis so that the contact spring lever rotates freely around the center axis around the center of the right upper corner of the casing by a set angle, and the casing contacts (a, b) The contact c is elastically contacted with the fixed contact e and f at the upper part of the inner part (normally, the circuit "ae-cg" is closed and "ae-bf" is opened). It is a change lever switch,

The contact spring part lever rotates downward by the set angle with the external force from the top against the tip of the lever protruding out of the casing, and the contact bottom piece is rotated upward to push up the contact spring piece c 'so that the contact c is fixed. (g), while the upper side of the opening rotates upward, the contact spring piece (b) rises so that the contact (b) contacts the fixed contact (f) to convert the circuit (the circuit "ae-cs" opens and " ae-bf "is closed), and if the external force on the tip of the lever is removed, the ae-bf" is provided so that it can be restored to its original shape by the elastic restoring force of the U-shaped spring piece,

When the circuit is converted by the lower rotation and the restoring rotation of the contact spring part lever by forming the male portion 4c 'of the lower side of the opening of the U-shaped concave portion as substantially the same length as the male portions 4a, 4b of the upper side as described above, When the upper portion 4a is rotated upward to raise the contact spring piece b 'so that the contact b is in contact with the fixed contact f, the male portion 4c at the lower side of the opening is still a contact spring piece ( c) do not push up, but contact (c) does not fall from the fixed contact (s), instantaneously the contact (b, c) is in contact with the fixed contact (f, g) at the same time, the entire circuit is temporarily energized to short circuit The problem is solved by a short-circuit type conversion lever switch provided to be in a state.

EXAMPLE

`` Non-Shock Conversion Lever Switch A1 ''

Next, an embodiment of the present invention will be described with reference to the drawings (see FIGS. 1 to 9 and 11).

A circular rotary part 3 is formed at a lower end, and a U-shaped recess 4 is formed in the circular rotary part 3 and is opened downwardly about a central axis 2 or a center hole. On the upper side of the opening part (4), the male part 4a of the contact spring piece a 'of the U-shaped spring piece 6 and the male part 4b of the contact spring piece b' are provided. 1.4 times longer than (4a, 4b), the male part 4c of the contact spring piece c 'and the engaging part 4d of the engaging spring piece d' of the engaging projection 7 are provided. Install the lever (5),

The upper piece of the U-shaped spring piece is branched into a contact spring piece (a'b ') having each tip as a contact (a, b), and the lower piece is a contact spring piece (c') having the tip as a contact (c). Install the U-shaped spring piece 6 branched by the engagement spring piece d ',

The engagement spring piece d 'of the U-shaped spring piece 6 is engaged in the U-shaped recess 4 of the lever 5, and the contact spring piece a, the contact spring lever 1, which is integrally fitted with the b ', c' supported by the male portions 4a, 4b, 4c, is provided,

The tip of the lever 5 is rotated to the right of the outer side of the casing 8 so that the contact spring lever 1 is freely rotated around the center of the center of the right upper part of the casing 8 by a set angle. At the same time as protruding diagonally upward, the contacts a, b are elastically contacted with the fixed contacts e, f of the upper part in the casing 8, and the contacts c are elastically contacted with the fixed contacts g of the lower part (normally). Is a conversion lever switch A1 configured so that the circuit "ae-cg" is closed and "ae-bf" is open),

The contact spring part lever 1 rotates downward by the set angle and the lower side of the opening rotates upward by an external force from the upper end to the tip of the lever 5 protruding out of the casing 8 so that the contact spring piece c 'is rotated upward. The contact c is pushed up to separate it from the fixed contact g, while the upper side of the opening rotates upward and the contact spring piece b rises so that the contact b contacts the fixed contact f to convert the circuit. The circuit "ae-cg" is opened and "ae-bf" is closed), and if the external force on the tip of the lever 5 is removed, it is provided to be restored to its original shape by the resilience of the U-shaped spring piece 6 ,

As described above, the circuit part is formed by the lower rotation and the restoring rotation of the contact spring lever 1 by protruding the male portion 4c of the lower side of the opening of the U-shaped recess 4 by 1.4 times longer than the male portion 4a of the upper side. When converted, the male portion 4a on the upper side of the opening rotates upward to raise the contact spring piece b 'so that the male portion 4c on the lower side of the opening is contact spring before the contact b contacts the fixed contact f. Push the piece c 'up so that the contact c is separated from the fixed contact g so that the contacts b and c are separated from the fixed contact f and g at the same time, so that the energization of all the circuits is temporarily completed. It is provided so as to be blocked so as to install a non-short conversion lever switch (A1).

Short-circuit type conversion lever switch A2 (see FIGS. 9 to 10 and 12)

In addition, the present invention is to form a circular rotary portion 3 at the lower end, to form a U-shaped concave portion 4 which is opened downward with the central axis 2 or the center hole in the circular rotary portion 3, the U On the upper side of the opening of the male recess 4, the male portion 4a of the contact spring a 'of the U-shaped spring piece 6 and the male portion 4b of the contact spring piece b' are provided. Install a lever 5 'provided with an engagement portion 4d of the engaging projection 7 protruding longer than the male portion 4b of the male portion 4b or a male portion 4c formed almost the same length as the male portion 4a of the upper side. ,

The upper piece of the U-shaped spring piece is branched into a contact spring piece (a'b ') having each tip as a contact (a, b), and the lower piece is a contact spring piece (c') having the tip as a contact (c). Install the U-shaped spring piece 6 branched by the engagement spring piece a ',

The engagement spring piece d 'of the U-shaped spring piece 6 is engaged in the U-shaped recess 4 of the lever 5', and the contact spring piece a is engaged with the engagement portion 4d. ', b', c ') are integrally inserted in a state supported by the respective male portions 4a, 4b, and 4c' to install the contact spring lever 1,

The front end of the lever 5 'is out of the casing 8 across the shaft so that the contact spring lever 1' is freely rotated by a set angle about its central axis 2 near the upper right corner in the casing 8. At the same time, the contact (a, b) is elastically contacted with the fixed contact (e, f) of the upper part of the casing (8) and the elastic contact (g) of the lower part (the usual Is a conversion lever switch (A2) configured to close the circuit "ae-cg" and "ae-bf" open,

The contact spring part lever 1 'is rotated downward by the set angle with the external force from the upper side with respect to the tip of the lever 5' protruding out of the casing 8, and rotates upwards toward the lower side of the opening to contact the contact spring piece c. ') Is pushed up to separate the contact (c) from the fixed contact (g), while the upper edge of the opening rotates upward, the contact spring piece (b) rises and the contact (b) contacts the fixed contact (f) To convert (circuit "ae-cg" w open and "ae-bf" closed), and remove the external force on the tip of the lever 5 'to restore the original force of the U-shaped spring piece 6 To be restored to,

As described above, the male portion 4c 'of the lower side of the opening of the U-shaped concave portion 4 is formed to have substantially the same length as the male portions 4a and 4b of the upper side. When the circuit is transformed, the male portion 4a on the upper side of the opening rotates upward to raise the contact spring piece b 'so that the contact portion b is still in contact with the fixed contact f. ) Does not push the contact spring piece (c ') and the contact (c) does not fall off the fixed contact (g) so that the contacts (b, c) contact the fixed contact (f, g) at the same time, A short-circuit blue conversion lever switch (A2) is provided by temporarily energizing all of them to short-circuit state.

In the conversion lever switches A1 and A2 of the above embodiment, the contact a and the fixed contact e are normally in contact in a conventional circuit.

The symbols " e '", " f' " 1, " g '" denote plugs for connecting the fixed contact circuit with the jack of the external circuit.

In this embodiment, the actual size of the casing 8 of the conversion lever switches A1 and A2 is 5.2 mm long, 15. mm wide, and 9.0 mm high, and the actual size of the contact spring levers 1, 1 'is vertical. 9.2 mm, width 12.5 mm, and height 4.5 mm.

`` Non-Short Transformation Lever Switch (A1) ''

Normally, the contacts a, c of the contact spring lever 1 contact the fixed contacts e, g of the casing 8, and the circuit "ae-cg" turns on and the circuit "ae-bf" turns off. (Fig. 11 (A)). Next, when an external force is applied to the tip of the lever 5 protruding out of the casing 8, for example, when the object descends and collides, the contact spring lever 1 is set at a set angle (20 to 25) about the central axis 2. Rotates downward by about a degree), and the lower side of the opening rotates upward to push the contact spring piece (c ') to separate the contact (c) from the fixed contact (g) (circuit "ae-cg' is off), The upper side 3a of the opening rotates upward, the contact spring piece b 'rises to contact the fixed contact f (the circuit' ae-bf 'is turned on), and the circuit is converted (Fig. 11). (C)).

When the external force on the lever 5 is released due to the object rising and returning in the above state, the contact spring part lever 1 is restored and rotated by the elastic restoring force of the U-shaped spring piece 6, and again the circuit ("ae-cg) "Ae, 'ae-bf" returns to the off state (Fig. 11 (A)).

However, when the circuit is changed by the lower rotation and the restoring rotation of the contact spring lever 1, in the present embodiment A1, the contact portion 4c is formed by protruding longer than the male portion 4a. (b, c) is separated from the fixed contact (f, s), and the energization of all the circuits is temporarily cut off completely.

The above operation is briefly described as follows.

(A) ← → (B) ← → (C)

(A) ae-cg. On

ae-bf… off

(B) ae-cg. off

ae-bf… off

(C) ae-cg. off

ae-bf… On

Short-circuit conversion lever switch (A2)

Normally, the contacts a and c of the contact spring lever 1 'contact the fixed contacts e and f of the casing 8 and the circuit "ae-cg" turns on and the circuit "ae-bf" turns off. (Figure 12 (A)).

Next, when an external force is applied to the tip of the lever 5 ', the contact spring lever 1' is rotated downward by the set angle (about 20 to 25 degrees), and the lower side of the opening is rotated upward to rotate the contact spring piece c '. ), The contact c is detached from the fixed contact (circuit ae-cg is turned off), while the upper side of the opening rotates upward and the contact spring piece b 'rises to contact the fixed contact f. ae, bf is turned on to convert the circuit (Fig. 12 (C)).

When the external force on the lever 5 'is released in this state, the contact spring lever 1' is restored and rotated by the resilience force of the U-shaped spring piece 6, and the circuit "ae-cg" is closed again and "ae-". bf "returns to the open state (FIG. 12A (A)).

The state of the start point and the end point of the above-described circuit conversion action is almost the same as in the case of the conversion lever switch A1 described above, but in the case of the conversion lever switch A2, the lower rotation and the restoration rotation of the contact spring lever 1 '. When the circuit is transformed by, the male portion 4c 'on the lower side of the opening is formed to have almost the same length as the male portions 4a, 4b on the upper side, so that the male portion 4c' is rotated at the lower side of the contact spring portion lever 1 '. The timing of pushing up the contact spring piece c 'is delayed. On the contrary, the contact timing of the contact point c and the fixed contact point g becomes faster at the time of restoring rotation. f, g), all the circuits are temporarily energized and brought into a short circuit state.

The above operation is briefly described as follows.

(A) ← → (B) ← → (C)

(A) ae-cg. On

ae-bf… off

(B) ae-cg. On

ae-bf… On

(C) ae-cg. off

ac-bf… On

It is possible to install an extremely small and high precision conversion lever switch by simply mounting the contact spring lever in the casing so as to rotate freely within the casing by a set angle and contacting each other with the upper and lower fixed contacts in the casing. have.

In addition, it is possible to install a non-short conversion lever switch by protruding the male portion 4C at the lower side of the opening of the contact soup applying lever long, and only forming the male portion 4c 'approximately the same length as the male portion 4a. By adjusting the length of the lower side of the opening so that a short-circuit type conversion lever switch can be installed, both types of conversion lever switches can be installed and provided freely, and the characteristics of the conversion lever switch can be improved. .

1 is a front view showing an embodiment of a conversion lever switch (non-short type) of the present invention;

2 is a plan view of the conversion lever switch of the present invention;

3 is a right side view of the conversion lever switch of the present invention;

4 is a left side view of the conversion lever switch of the present invention;

5 is a cross-sectional view taken along the line A-A of FIG. 2;

6 is a cross-sectional view taken along line B-B in FIG. 1;

Longitudinal front, top and left side views of the 7A, 7B and 7C or levers (for non-short);

8A, 8B, 8C, and 8D or the front view, the top view, the bottom view, and the left side view of the U-shaped spring piece;

9 is a longitudinal sectional front view showing an embodiment of a conversion lever switch (short type) of the present invention;

Longitudinal front view, top view and left side view of the 10A, 10B and 10C or lever (for short type),

(A), (B) and (C) in FIG. 11 are explanatory diagrams showing the conversion operation procedure of the non-short conversion lever switch; And

(A), (B), and (C) of FIG. 12 are explanatory views showing the conversion operation procedure of a short-circuit type conversion lever switch.

* Explanation of symbols for the main parts of the drawings

A1: non-short conversion lever switch of the present invention

A2: short-circuit conversion lever switch of the present invention

a, b, c: contact a'b'c ': contact spring

d ': engagement spring piece e, f, g: fixed contact

e'f'g ': Plug of fixed contact 1: Contact spring lever (non-short type)

1 ': Contact spring lever (short circuit type) 2: Central axis

3: circular rotating part 4: U-shaped rotating part

4a, 4b: Male part 4c: Male part (for non-short type)

4c ': Male part (short type) 5: Lever (non short type)

5 ': Lever (Short-cut type) 6: U-shaped spring piece

7: engaging projection 8: casing

Claims (2)

A circular rotary part is formed at the lower end, and a U-shaped recess opening downward is formed around the central axis or the center hole, and a contact spring piece (a ') of the U-shaped spring piece is formed at the upper side of the opening of the U-shaped recess. ) And a male portion 4b of the contact spring piece b 'are provided and protruded by 1.4 times longer than the male portions 4a and 4b of the upper side at the lower side of the opening to form the contact spring piece c'. Install the lever on which the engagement portion 4d of the engagement portion 4d of the engagement portion 4c of the engagement projection is installed, The upper piece of the U-shaped spring piece is branched into a contact spring piece (a'b ') having each tip as a contact (a, b), and the lower piece is a contact spring piece (c') having the tip as a contact (c). Install the U-shaped spring piece branched by the engagement spring piece (d '), The engagement spring pieces d 'of the U-shaped spring pieces are engaged in the U-shaped recesses of the lever, and the engagement spring pieces a', b ', c' are simultaneously engaged with the engaging portions 4d. In the state supported by (4a, 4b, 4c), the contact spring part lever is installed by inserting it integrally, The contact spring part lever protrudes toward the upper right diagonal out of the casing along the axis so as to rotate freely around the right upper part of the casing by a set angle about its central axis, and at the same time, the contacts a and b are casing. A transformation configured to elastically contact the contact c with the fixed contact e and f in the upper part (normally, the circuit "ae-cg" is closed and "ae-bf is open") It is a lever switch, and the contact spring part lever rotates downward by a set angle with the external force from the upper side with respect to the tip of the lever which protrudes out of the casing, and the lower side of the opening rotates upward to push up the contact spring piece c 'to raise the contact ( c) is separated from the fixed contact g, while the upper side of the opening rotates upwards and the contact spring piece b rises so that the contact b contacts the fixed contact f to close the circuit. Ring provided that comprises to (circuit "ae-cg" opens "ae-bf" is closed), and further by removing the external force on the lever front end restore the original state by the U-shaped spring piece elastic restoring force, As described above, by protruding the male portion 4c of the lower side of the opening of the U-shaped concave portion by 1.4 times longer than the male portion 4a of the upper side, when the circuit is changed by the lower rotation and the restoration rotation of the contact spring portion lever, The male portion 4a rotates upward to raise the contact spring piece b 'so that the male portion 4c on the lower side of the opening pushes the contact spring piece c' before the contact b contacts the fixed contact f. The contact c is separated from the fixed contact g so that the contacts b and c are separated from the fixed contact f and g at the same time so that the energization of all the circuits is temporarily cut off. Non-short type conversion lever switch characterized by the above-mentioned. A circular rotary part is formed at the lower end, and a U-shaped recess opening downward is formed around the central axis or the center hole, and a contact spring piece (a ') of the U-shaped spring piece is formed at the upper side of the opening of the U-shaped recess. ), The male portion 4a and the contact portion 4b of the contact spring piece b are provided, and the engagement portion 4d or the upper side of the engaging projection of the engaging projection which protrudes longer than the male portion 4b of the upper side is provided at the lower side of the opening. A lever provided with a male portion 4c 'formed of substantially the same length as the male portion 4a is provided, The upper side of the U-shaped spring piece is branched into the contact spring pieces a 'and b' having the front ends as the contacts a and b, and at the same time the contact spring piece c 'with the lower end as the contact c. ) And U-shaped spring pieces branched into the mating spring pieces (d '), The engagement spring pieces d 'of the U-shaped spring pieces are engaged in the U-shaped recesses of the lever, and the contact spring pieces a, b', and c 'are simultaneously engaged with the engaging portions 4d. 4a, 4b, 4c '), and integrally insert and attach the contact spring lever The contact spring part lever protrudes toward the upper right diagonal side out of the casing while the lever rotates freely by a set angle around the center axis around the right upper part of the casing. The contact c is elastically contacted with the fixed contact e and f at the upper part of the casing, and the contact point c is elastically contacted with the fixed contact g with the lower part (normally, the circuit "ae-cg" is closed and "ae-bf" is opened). It is a change lever switch, The contact spring part lever rotates downward by a set angle with the external force from the upper side against the tip of the lever protruding out of the casing, and the contact bottom piece is rotated upward to push the contact spring piece c to raise the contact point c. (g), while the upper side of the opening rotates upwards and the contact spring piece (b) rises so that the contact (b) contacts the fixed contact (f) to convert the circuit (circuit "ae-cg" is opened and " ae-bf "is closed), and if the external force on the tip of the lever is removed, the ae-bf" is provided so that it can be restored to the original state by the resilience of the U-shaped spring piece. When the circuit is converted by the lower rotation and the restoring rotation of the contact spring part lever by forming the male portion 4c 'of the lower side of the opening of the U-shaped concave portion as substantially the same length as the male portions 4a and 4b of the upper side as described above, When the upper portion 4a rotates upward to raise the contact spring piece b 'so that the contact b contacts the stationary contact f, the male portion 4c on the lower side of the opening is still in contact spring piece c. 'C' is not pushed away from the fixed contact g, and the contacts b and c are brought into contact with the fixed contact f and g at the same time so that the entire circuit is temporarily energized. Short-circuit conversion lever switch characterized in that the state provided.