US3718877A - Switch for push key - Google Patents

Switch for push key Download PDF

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Publication number
US3718877A
US3718877A US00181080A US18108071A US3718877A US 3718877 A US3718877 A US 3718877A US 00181080 A US00181080 A US 00181080A US 18108071 A US18108071 A US 18108071A US 3718877 A US3718877 A US 3718877A
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Prior art keywords
hooks
case
switch
cover
key
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Expired - Lifetime
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US00181080A
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A Matsushima
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Hattori Tokeiten KK
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Hattori Tokeiten KK
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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
    • C08G18/72—Polyisocyanates or polyisothiocyanates
    • C08G18/721—Two or more polyisocyanates not provided for in one single group C08G18/73 - C08G18/80
    • C08G18/727—Two or more polyisocyanates not provided for in one single group C08G18/73 - C08G18/80 comprising distillation residues or non-distilled raw phosgenation products
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10H—ELECTROPHONIC MUSICAL INSTRUMENTS; INSTRUMENTS IN WHICH THE TONES ARE GENERATED BY ELECTROMECHANICAL MEANS OR ELECTRONIC GENERATORS, OR IN WHICH THE TONES ARE SYNTHESISED FROM A DATA STORE
    • G10H1/00—Details of electrophonic musical instruments
    • G10H1/02—Means for controlling the tone frequencies, e.g. attack or decay; Means for producing special musical effects, e.g. vibratos or glissandos
    • G10H1/04—Means for controlling the tone frequencies, e.g. attack or decay; Means for producing special musical effects, e.g. vibratos or glissandos by additional modulation
    • G10H1/043—Continuous modulation
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
    • H01H13/50—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a single operating member
    • H01H13/52—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a single operating member the contact returning to its original state immediately upon removal of operating force, e.g. bell-push switch
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H36/00—Switches actuated by change of magnetic field or of electric field, e.g. by change of relative position of magnet and switch, by shielding
    • H01H36/0006—Permanent magnet actuating reed switches
    • H01H36/004—Permanent magnet actuating reed switches push-button-operated, e.g. for keyboards
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H36/00—Switches actuated by change of magnetic field or of electric field, e.g. by change of relative position of magnet and switch, by shielding
    • H01H36/0006—Permanent magnet actuating reed switches
    • H01H36/0046—Limit switches, also fail-safe operation or anti-tamper considerations
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03C—MODULATION
    • H03C3/00—Angle modulation
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03C—MODULATION
    • H03C3/00—Angle modulation
    • H03C3/10—Angle modulation by means of variable impedance

Definitions

  • ABSTRACT A switch for a push key of a calculator or the like comprising, a switch case with built-in members and a [30] Foreign Application Priority Data Sept. 22, 1970 Japan cover. Hooks projecting downwardly from the cover engage with edges of an upper flange of the switch case and the extreme ends of said hooks fit into positioning holes bored in a supporting plate on the calculator. This enables the key-top to be mounted at a desired position.
  • This invention relates to a switchfor a push key and more particularly to a switch for a push key of an electronic calculator and the like.
  • One object of the present invention is to provide a switch fora push key which is provided with a positionregulating member and thus a keylever is arranged at the regular position without fine-adjustment.
  • Another object of the present invention is to provide a switch for a push key which is easy to set on a switc supporting plate and simple in construction.
  • an improved switch for a push key comprising a switch case with built-in switch members and a cover for the switch case.
  • the switch case is provided with edges and the cover is provided with hooks engageable with these edges. The hooks fix their extreme ends into positioning holes bored in a supporting plate.
  • FIG. 1 is a plan view of a switch case according to the invention.
  • FIG. 2 is a plan view of a cover of the switch case of FIG. 1;
  • FIG. 3 is a sectional view taken along section line III-III in FIG. 1;
  • FIG. 4 is. an enlargedfragmentary sectional view along section line IVIV in FIG. 2;
  • FIG. 5 is a fragmentary bottom view showing the positioning portion of a supporting plate in FIG. 4.
  • a cavity or space 2 in which a key level 3 is slidably accommodated.
  • a permanent magnet 4 is mounted in a hole bored in the central portion of the-key lever 3.
  • a magnetically permeable plate 5 is fixed to the back side of the permanent magnet 4.
  • Lower end portions of the magentically permeable plate 5 are hooked or L-shaped and protrude through the lever 3, and another lower end portion of the plate 5 is reversely booked and forms a spring book 6.
  • the key lever is provided with two washers 7 made of. rubber axially spaced from each other. The lowermost end of the key lever 3 can protrude into a hole 8bored in the bottom of the case 1.
  • a reed switch 9 In front of the magnet 40f the case 1, there is provided a reed switch 9. An upper side reed wire 10 is bent and led to a printed circuit board, and another reed wire 11' is also connected to a certain point of the printed circuit board by soldering or the like. A cushion material elongated washer Bis provided in the hole in which the reed switch 9 is inserted.
  • a circumferential flange I4 is formed at the top of the switch case 1. This flange is nearly square as shown in FIG. 1, and one pair of opposing corners is cut off to form engageable edges and in the other pair of opposing corners are bored mounting holes 16, 16.
  • a cover 17 has at the center thereof a hole 18 through which the top of the key lever 3 slidably protrudesand a spring hook19 is provided opposed to the spring hook 6.
  • a coil spring 20 is connected at opposite ends between the spring hooks 6 and 19.
  • mounting holes 21, 21 are bored at opposite corners corresponding to the mounting holes 16,. 16 of the switch case I.
  • catches or hooks 22, 22 engageable with the engageable edges 15, 15 of the case as shown.
  • These hooks 22, 22, as shown in FIG. 4 and FIG. 5, project inwardly from square depending portions and the axial ends of'the hooks are formed as conically shaped or bevelled portions 23, 23.
  • a supporting plate 24 of a calculator is provided a hole or opening 25 into which the case 1 is inserted.
  • Positioning holes 26, 26 and mounting tapped holes are likewise provided. The positioning holes 26, 26 are bored at selected positions and they receive the depending or downwardly extending mounting portions 23, 23.
  • the mounting holes are preferably round-shaped into which the square or rectangular fitting portions 23, 23 are forced, as shown in FIG. 5.
  • the cover 17 is mounted on the switch case 1 in such a manner that the upper portion of the key lever 3 protrudes from the hole 18, and the upper end of the coil spring 20 is mounted over the hook 19.
  • the cover 17 is pressed to the switch case 1, the bevelled tips of the hooks 22, 22 of the cover engage the top flange of the case and the hooks bend slightly outwardly and snap over the flange 14 to engage with the edges l5, 15 of the switch case 1.
  • the switch case 1, covered with the cover 17 in the manner described above, is inserted into the hole 25 of the supporting plate 24, and the mounting portions 23, 23 are forced into the positioning holes 26, 26.
  • the hooks 22, 22 are square-shaped in cross section and the positioning holes 26, 26 are round-shaped, so that the hooks are pressed into the positioning holes even if the holes are a little tight for the hooks.
  • the key lever 3 is arranged in a regular position.
  • the switch case 1 and the cover 17 are fixed t0 the supporting plate 24 by screws 27, 27 threaded in the threaded mounting holes 21, 21 and 16, 16.
  • the spring 20 biases the push-key upwardly and when it is actuated by depressing it the magnet carried thereon closes the reed switch elements and upon release of the key it is restored to its raised position and the switch opens.
  • a push-key for use in a calculator and the like, in combination, a push-key, a switch case, switch means in said case having contacts operable to a closed and open position in response to actuation of said push-key, means on said switch key for actuating said switch contacts, a cover on said case having integral thereon snapon hooks extending in a direction for engaging catch surfaces on said case, a support member having mounting holes, and said hooks having portions extending past said cover surfaces when said cover is mounted on said case for being received snugly in said mounting holes on said support member.
  • said hooks comprise, a portion mounted adjacent the periphery of said cover bendable outwardly from said periphery for clearing said case and snapping back to engage said hooks on said surfaces.
  • a case for a push-key comprising, a body, a cover having an opening for inserting a key therein into said body, said body having an inner space for housing a push-key actuated switch, said cover having a greater transverse dimension than said body, said cover having integral hooks extending in a direction for engaging surfaces on said case body, said hooks having shanks integral with said cover and having bevelled surfaces for engaging said body and being actuated outwardly away from said body and snapping back to engage said body, said body having flange surfaces for actuating said hooks outwardly when said bevelled surfaces are pressed against said flange surfaces and undersurfaces defining the first-mentioned surfaces engaged by said hooks.

Abstract

A switch for a push key of a calculator or the like comprising, a switch case with built-in members and a cover. Hooks projecting downwardly from the cover engage with edges of an upper flange of the switch case and the extreme ends of said hooks fit into positioning holes bored in a supporting plate on the calculator. This enables the key-top to be mounted at a desired position.

Description

[ 1 Feb. 27, 1973 United States Patent [191 Matsushima [s41 SWITCH FOR PUSH KEY References Cited UNITED STATES PATENTS [75] Inventor: Akira Matsushima, Chiba, Japan .200/168 C X 8/1969 Peroni et al.
3,609,268 Sanchez....................... [73] Assrgnee: Kabushlki Kaisha Hatton Tokelten, 3,462,719 335/206 Tokyo, Japan Primary ExaminerRoy N. Envall, Jr. Attorney-Robert E. Burns et al.
[22] Filed: Sept. 16, 1971 [21] Appl. No.: 181,080
ABSTRACT A switch for a push key of a calculator or the like comprising, a switch case with built-in members and a [30] Foreign Application Priority Data Sept. 22, 1970 Japan cover. Hooks projecting downwardly from the cover engage with edges of an upper flange of the switch case and the extreme ends of said hooks fit into positioning holes bored in a supporting plate on the calculator. This enables the key-top to be mounted at a desired position.
6 Claims, 5 Drawing Figures SWITCH FOR PUSH KEY BACKGROUND OF THE INVENTION This invention relates to a switchfor a push key and more particularly to a switch for a push key of an electronic calculator and the like.
DESCRIPTION OF THE PRIOR ART Conventionally in order to mount aswitch for a push key to a frame of a calculator or the like a hole which meets with the outside dimensions of the switch case is made in the frame, and the switch case is inserted into this hole. A cover is puton the switch case and is fineadjusted in such a manner that akey lever may be arranged in a regular or desired position and in a set order. Then the cover is screwed on.
In the construction described above, there is a disadvantage in that a clearance between the hole and the switch case occurs, and it is very difficult. to for the switch case at its regular position, so that to screw the switch case and the cover to the supporting plate a fineadjustment is necessary- Thus it takes much time and labor to fix the switch case and the cover.
SUMMARY OF THE INVENTION One object of the present invention is to provide a switch fora push key which is provided with a positionregulating member and thus a keylever is arranged at the regular position without fine-adjustment.
Another object of the present invention is to provide a switch for a push key which is easy to set on a switc supporting plate and simple in construction. 1
According to a feature of the present invention, there is provided an improved switch for a push key comprising a switch case with built-in switch members and a cover for the switch case. The switch case is provided with edges and the cover is provided with hooks engageable with these edges. The hooks fix their extreme ends into positioning holes bored in a supporting plate.
BRIEF DESCRIPTION OF THE DRAWINGS These object, other objects and the characteristic features of the present invention will become evident and will be more readily understood from the following description and claims taken in conjunction with the accompanying drawings, in which:
FIG. 1 is a plan view of a switch case according to the invention; Y
FIG. 2 is a plan view of a cover of the switch case of FIG. 1;
FIG. 3 is a sectional view taken along section line III-III in FIG. 1;
FIG. 4 is. an enlargedfragmentary sectional view along section line IVIV in FIG. 2; and
FIG. 5 is a fragmentary bottom view showing the positioning portion of a supporting plate in FIG. 4.
DESCRIPTION OF THE PREFERRED EMBODIMENT Referring now to the drawings, in the center of a switch case 1, is provided a cavity or space 2 in which a key level 3 is slidably accommodated. A permanent magnet 4 is mounted in a hole bored in the central portion of the-key lever 3. A magnetically permeable plate 5 is fixed to the back side of the permanent magnet 4. Lower end portions of the magentically permeable plate 5 are hooked or L-shaped and protrude through the lever 3, and another lower end portion of the plate 5 is reversely booked and forms a spring book 6. The key lever is provided with two washers 7 made of. rubber axially spaced from each other. The lowermost end of the key lever 3 can protrude into a hole 8bored in the bottom of the case 1. In front of the magnet 40f the case 1, there is provided a reed switch 9. An upper side reed wire 10 is bent and led to a printed circuit board, and another reed wire 11' is also connected to a certain point of the printed circuit board by soldering or the like. A cushion material elongated washer Bis provided in the hole in which the reed switch 9 is inserted.
At the top of the switch case 1, a circumferential flange I4 is formed. This flange is nearly square as shown in FIG. 1, and one pair of opposing corners is cut off to form engageable edges and in the other pair of opposing corners are bored mounting holes 16, 16. A cover 17 has at the center thereof a hole 18 through which the top of the key lever 3 slidably protrudesand a spring hook19 is provided opposed to the spring hook 6. A coil spring 20 is connected at opposite ends between the spring hooks 6 and 19.
In the cover 17 mounting holes 21, 21 are bored at opposite corners corresponding to the mounting holes 16,. 16 of the switch case I. At the other pair of opposite comers there are provided downwardly extending catches or hooks 22, 22 engageable with the engageable edges 15, 15 of the case as shown. These hooks 22, 22, as shown in FIG. 4 and FIG. 5, project inwardly from square depending portions and the axial ends of'the hooks are formed as conically shaped or bevelled portions 23, 23. In a supporting plate 24 of a calculator is provided a hole or opening 25 into which the case 1 is inserted. Positioning holes 26, 26 and mounting tapped holes are likewise provided. The positioning holes 26, 26 are bored at selected positions and they receive the depending or downwardly extending mounting portions 23, 23. The mounting holes are preferably round-shaped into which the square or rectangular fitting portions 23, 23 are forced, as shown in FIG. 5.
In the operation the cover 17 is mounted on the switch case 1 in such a manner that the upper portion of the key lever 3 protrudes from the hole 18, and the upper end of the coil spring 20 is mounted over the hook 19. When the cover 17 is pressed to the switch case 1, the bevelled tips of the hooks 22, 22 of the cover engage the top flange of the case and the hooks bend slightly outwardly and snap over the flange 14 to engage with the edges l5, 15 of the switch case 1. The switch case 1, covered with the cover 17 in the manner described above, is inserted into the hole 25 of the supporting plate 24, and the mounting portions 23, 23 are forced into the positioning holes 26, 26. The hooks 22, 22 are square-shaped in cross section and the positioning holes 26, 26 are round-shaped, so that the hooks are pressed into the positioning holes even if the holes are a little tight for the hooks. Thus the key lever 3 is arranged in a regular position. Finally the switch case 1 and the cover 17 are fixed t0 the supporting plate 24 by screws 27, 27 threaded in the threaded mounting holes 21, 21 and 16, 16. Those skilled in the art will understand that the switch operates in known manner upon axial actuation of the push key. The spring 20 biases the push-key upwardly and when it is actuated by depressing it the magnet carried thereon closes the reed switch elements and upon release of the key it is restored to its raised position and the switch opens.
What I claim and desire to secure by Letters Patent 1. For use in a calculator and the like, in combination, a push-key, a switch case, switch means in said case having contacts operable to a closed and open position in response to actuation of said push-key, means on said switch key for actuating said switch contacts, a cover on said case having integral thereon snapon hooks extending in a direction for engaging catch surfaces on said case, a support member having mounting holes, and said hooks having portions extending past said cover surfaces when said cover is mounted on said case for being received snugly in said mounting holes on said support member.
2. The combination according to claim 1, in which said hooks comprise, a portion mounted adjacent the periphery of said cover bendable outwardly from said periphery for clearing said case and snapping back to engage said hooks on said surfaces.
3. The combination according to claim 1, in which said switch comprises, a reed switch, said means on said push-key for actuating said contacts comprising a per manent magnet.
4. The combination according to claim 3, in which said integral hooks comprise, a bendable plastic material.
5. A case for a push-key comprising, a body, a cover having an opening for inserting a key therein into said body, said body having an inner space for housing a push-key actuated switch, said cover having a greater transverse dimension than said body, said cover having integral hooks extending in a direction for engaging surfaces on said case body, said hooks having shanks integral with said cover and having bevelled surfaces for engaging said body and being actuated outwardly away from said body and snapping back to engage said body, said body having flange surfaces for actuating said hooks outwardly when said bevelled surfaces are pressed against said flange surfaces and undersurfaces defining the first-mentioned surfaces engaged by said hooks.
6. A case for a push-key according to claim 5, in which said bevelled surfaces extend downwardly of said hooks for being received in mounting openings on a support member on which case is mounted.
a: a: a:

Claims (6)

1. For use in a calculator and the like, in combination, a pushkey, a switch case, switch means in said case having contacts operable to a closed and open position in response to actuation of said push-key, means on said switch key for actuating said switch contacts, a cover on said case having integral thereon snap-on hooks extending in a direction for engaging catch surfaces on said case, a support member having mounting holes, and said hooks having portions extending past said cOver surfaces when said cover is mounted on said case for being received snugly in said mounting holes on said support member.
2. The combination according to claim 1, in which said hooks comprise, a portion mounted adjacent the periphery of said cover bendable outwardly from said periphery for clearing said case and snapping back to engage said hooks on said surfaces.
3. The combination according to claim 1, in which said switch comprises, a reed switch, said means on said push-key for actuating said contacts comprising a permanent magnet.
4. The combination according to claim 3, in which said integral hooks comprise, a bendable plastic material.
5. A case for a push-key comprising, a body, a cover having an opening for inserting a key therein into said body, said body having an inner space for housing a push-key actuated switch, said cover having a greater transverse dimension than said body, said cover having integral hooks extending in a direction for engaging surfaces on said case body, said hooks having shanks integral with said cover and having bevelled surfaces for engaging said body and being actuated outwardly away from said body and snapping back to engage said body, said body having flange surfaces for actuating said hooks outwardly when said bevelled surfaces are pressed against said flange surfaces and undersurfaces defining the first-mentioned surfaces engaged by said hooks.
6. A case for a push-key according to claim 5, in which said bevelled surfaces extend downwardly of said hooks for being received in mounting openings on a support member on which case is mounted.
US00181080A 1970-09-22 1971-09-16 Switch for push key Expired - Lifetime US3718877A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3853199A (en) * 1971-11-30 1974-12-10 Nissan Motor Collision sensor for fender bumper operated vehicle safety device
US4334204A (en) * 1980-06-30 1982-06-08 The Boeing Company Proximity switch assembly

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3462719A (en) * 1967-10-26 1969-08-19 Peter A Peroni Universal modular printed circuit magnetic reed keyboard switch assembly
US3609268A (en) * 1970-05-25 1971-09-28 Gil C Sanchez Integrated rocker-switch and indicator-light unit

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT299361B (en) * 1969-01-13 1972-05-15 Schaltelektronik Veb K ARRANGEMENT FOR FASTENING REVERSIBLE END PLATES ON PACKAGE SWITCHES

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3462719A (en) * 1967-10-26 1969-08-19 Peter A Peroni Universal modular printed circuit magnetic reed keyboard switch assembly
US3609268A (en) * 1970-05-25 1971-09-28 Gil C Sanchez Integrated rocker-switch and indicator-light unit

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3853199A (en) * 1971-11-30 1974-12-10 Nissan Motor Collision sensor for fender bumper operated vehicle safety device
US4334204A (en) * 1980-06-30 1982-06-08 The Boeing Company Proximity switch assembly

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DE2147399A1 (en) 1972-04-06
GB1327904A (en) 1973-08-22
FR2108325A5 (en) 1972-05-19
DE2147399C2 (en) 1982-05-13

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