TWI222652B - Key switch device and keyboard device - Google Patents

Abstract

The present invention provides a key switch device where miniaturization and thinning are easy and key input can be carried out by positively contacting a contact part even when a circumferential rim part of a key top face is pressed by fingers or the like, and a keyboard device provided with the key switch device. The key switch device 1 is provided with a plurality of lever members 3-5 with one end sides turnably engaged with a base plate 2, a holding member 6 supported so as to vertically move with respect to the base plate 2 by engaging with other end sides of the lever members 3-5, and a switching element 9 provided between the base plate 2 and the holding member 6 and carrying out a switching action following vertical movement of the holding member 6. Turning shafts (shaft parts 3f and 4f) of the bilaterally symmetrical first and second lever members 3 and 4 are engaged with a groove part 6f (a guide groove) of the holding member 6, and a turning shaft (a shaft part 5d) of the lever member 5 is arranged so as to cross the turning shafts (the shaft parts 3f and 4f) of engagement parts of the lever members 3 and 4.

Description

1222652 Description of the invention: [Technical field to which the invention belongs] The present invention relates to a key switch device used in a keyboard device or an input switch device used in an input / output device such as a word processor and a personal computer, and the key switch device provided with the same Keyboard device. [Prior Art] An X-shaped key switch device previously applied to a keyboard device will be described with reference to Figs. 4 and 5. A mounting member 31 made of a metal plate or the like has a bottom wall 31a, a long support portion 3 1 b cut off from the bottom wall 3 1 a in a bilaterally supported state, and a plurality of neatly aligned support portions; and a bottom wall 3 1 a is cut in a cantilever state, and a plurality of semi-circular arc-shaped fixing portions 3 1 c are paired with the above-mentioned support portion 3 lb and are aligned in a row. In addition, a flexible substrate (not shown) having a plurality of fixed contact points 32 is disposed on the bottom wall 3 1 a. The movable contact member 33 has a cup-shaped movable portion 33a made of a resin material or the like, and a contact portion 33b provided on the upper surface of the inner portion of the movable portion 33a. The movable contact member 33 is opposed to the fixed contact 32. The state is mounted on a flexible substrate. Further, when the movable portion 33a is pressed and moved, the contact portion 33b contacts the fixed contact 32. In addition, when the pressing of the movable portion 33a is released, the movable portion 33a recovers itself, and the contact portion 33b returns to the non-contact state. The i-th lever member 34 made of a synthetic resin molded article includes: a pair of arm portions 34a formed in a [] shape; a connecting portion 34b connecting the pair of arm portions 34 & one end portion; and another pair of arm portions 34a provided A cylindrical lock portion 34e on one end portion. The second lever member 35 made of a synthetic resin molded article has: a Η-shaped pair of arms 35a; a connecting portion 35b connecting the pair of arms to the central portion; and a pair of arms ... provided at both ends Circle on the part -6-

84152.DOC

[222652 Columnar locking parts 35c, 35d. Further, the first and second lever members μ, "are provided so that the second lever member 35 is positioned in the first lever member 34, and the first and second lever members are positioned on the center of both by the rotation axis 34d. The lever member 34 and the cross-reading are combined to form an X-shaped retractor structure, and the rotation axis is rotated by 3 =: points, so that the upper sides of the first and second sample members 34 and 35 can be raised and lowered. In addition, the combined first When the second lever member 34, 35 is mounted on the mounting member ", as shown in Fig. 4," f "first presses a pair of arm portions 35a of the second lever member 35 in the direction of the arrow χ-the end portions are brought close to each other. After the lock foot 35c is matched with the fixed portion 31c, the pressing force in the direction of arrow 乂 is released, and the self-restoring force of the arm 35a makes the lock portion 35c locked in the fixed portion 3 lc. Second, as shown in the figure As shown in FIG. 4, one end of the pair of arm portions 34 a of the first ^ member 34 is pressed in the direction of the arrow γ to bring them into a close state. After the lock portion 34 c and the support portion 31 b are matched, the pressing force in the γ direction is released, and The self-restoring force of the arm portion 34a causes the lock portion 34 (; to be locked in the support portion 31b. As such, the i-th Both the second lever member 34 and the second lever member 34 are mounted on the mounting member 31 with the pair of arm portions 34a and 35a being pressed. When the first and second lever members 34 and 35 are mounted on the mounting member 31, they are movably connected. The point member 33 is located on the lower part of the cross-shaped center portion, and the movable contact member 33 can be pressed by the second lever member 35. The key top 36 made of a synthetic resin molded product forms an inverted boat shape and has A rail portion 3 formed by a groove in the up-down direction provided on the inside of the lower surface and a rail portion 36b formed by a groove in the horizontal direction provided on the inner surface of the lower surface. The button top 36 connects the i-th lever member 34. Part 3 讣 is inserted into the guide part 36 &, and the locking part 35d of the 24th dry member 35 is inserted into the guide part 36b, so that

84152.DOC

[222652, the structure of the second rod member 34, 35 mounting support. This constitutes a button # 36, a set of first and second lever members 34, 35, a movable contact member 33, a fixed contact 32, and a mounting member 31. A key switch device is formed, and a plurality of such key switches are arranged. Device to form a keyboard device. Secondly, when such a conventional key switch device operates, first, when the top of the key is pressed, the first and second lever members 34'35 are pressed, and the second and third lever members 34, 35 are rotated by the rotation axis 34 ( 1 is the fulcrum rotation down. At this time, the lock lever 35a of the second lever member is rotated in a state held by the fixing portion 31c, and at the same time, the lock portion 34c of the first talent 34 is supported by the support portion 31b. The state of sliding is moving upward in the horizontal direction. In addition, on the button top 36 side, the locking portion 35d of the second lever member 35 slides and moves in the guide rail portion in the horizontal direction, and at the same time, the connecting portion 34b of the first lever member 34 moves in the vertical direction. It slides in the direction within the guide rail portion 36a. Then, by the lowering of the first and second lever members 34 and 35, the movable portion 33a of the rotary contact portion 33 is pressed, and the contact portion 33b comes into contact with the fixed contact 32 and When the pressing force on the top 36 of the button is released, by the self-recovery of the movable Shao 33a, the ith and second lever members 34 and 35 are pushed back up, and the top 36 of the button is also raised, and the first The second lever members 34 and 35 and the button top 36 return to the state before pressing The problem to be solved by the present invention is that the key switch device having the above structure is widely used in a keyboard device of a personal computer and the like, but with the miniaturization of electronic devices in recent years, The demand for miniaturization and thinning is increasing. However, the push-button switch device having the structure shown in Figs. 4 and 5 is used as a lever.

84152.DOC 1222652 The rotation axis 34d of the center of rotation of the parts 34 and 35 is located at the center of the length of the lever members 34 and 35. The upper axis of the lever members 34 and 35 is connected to the center of the rotation axis 34d. The lower end sides of 34 and 35 are connected to the mounting member 31 side. The goal is to reduce the size and thickness of the key switch device. When the lever members 34 and 35 are shortened, the lever members 34 and 35 can rotate smoothly. Because of its limitation, it cannot be further downsized and thinned. In addition, in the above-mentioned push button switch device of the lever member side view X configuration, when the button top 36 is pressed on the upper peripheral portion on the shaft support portion side, the button top 36 is inclined in the direction of FIG. 5A_B instead of The ruler may be pressed down flatly, and although the top of the button is pressed, the contact point portion 33b and the fixed contact point 32 may not be in contact with each other. Therefore, it is required to reliably contact a key switch device for inputting a key without a part even when the peripheral part above the top of the key is pressed with a finger or the like. —The purpose of the present invention is to solve the above-mentioned problems. It provides easy miniaturization and thinning, and it is possible to perform contact with the contact portion even when the surrounding part on the top of the key is pressed with a finger or the like. A key switch device for key input In addition, an object of the present invention is to provide a keyboard device including the key switch device described above, which is easy to miniaturize and has excellent operability. [Summary of the Invention] Means for Solving the Problems In order to achieve the above object, the present invention adopts the following configuration. The key switch device of the present invention is characterized in that: and is, and is equipped with a base; allowing one end side to be movably engaged with a person on the base X; the base part is connected to the other end side of the lever member Card ... the top of the button supported by the base above, which can be raised and lowered;

84152.DOC -9- [222652 ㈣ Switching elements for lifting and lowering operations; on the upper Shao: 2 :: engagement Shao, respectively forming a rotation axis that allows the above lever member to rotate freely in its rotation plane, The above :: is the first engaging part of the above base: or the top of the button to movably support the ::.: Of the other, and the other card A of the rotation shaft A, is used as the shaft support% of the above rotation II: Erhe Shao, The plurality of rod members are composed of a second rod member and a tool.

The rotation axis or rotation of the second rod of the second member is composed of the rod member. The top of the button of the above-mentioned magic and second rod member = the engaging part system, as the rotation axis of the second rod member. The “movable ground card” is formed in the [engagement portion of the guide groove on the top of the button.] In the button _ device configured as described above, each lever member is not in the cross position as in the conventional 现有 switch device 2 The root lever member is supported by the shaft, and is configured to be independently engaged with the base and the top of the button. The rotation axis of at least one lever member intersects with the rotation axes of the other lever members. With this configuration, even if When the length of the lever member is shortened for the purpose of miniaturization and thinning of the key switch, the operability at the time of key input is not impaired, and it is easier than a key switch device with a conventional χ-type support. Miniaturization and thinness. In addition, when the peripheral part above the top of the key is pressed when a key is input, the top of the key cannot be lowered in an inclined state, but is lowered while remaining almost horizontal. This is because, for example, when the key tops are supported by two lever members, as in the conventional key switch device, when the rotation axis of the key top side of these lever members is arranged in parallel, the top of the key is allowed to be perpendicular to some of the rotation axes. The direction is inclined, and in the constitution of the present invention, two

84152.DOC -10- [222652 In the rotation axis, due to the inclination of the rotation direction of the one-sided rotation axis?, The sample part of the rotation axis orthogonal to the palatal rotation axis = The top part is maintained horizontally ascending and descending. Therefore, according to this: == device 'can prevent the horizontal shaking of the top of the button, ground = Shao :: without tilting up and down, and can reliably switch the switch element when the key is input. Alternatively, the following configuration can be applied. That is, its characteristic surface is provided with: a base two: a plurality of lever members that are movably engaged with the base on the side; and two ends that are "" end-to-side engaged and supported by the base to be lifted and lowered: = and A switching element that performs a switching force in accordance with the ascending and descending action of the top of the button; on the engaging portions at both ends of the lever member, respectively, a rotation axis is formed so that the lever member can rotate freely within its rotation plane. The square engaging portion serves as a second engaging portion that movably supports the rotation shaft to the base or the top of the button, and the other engaging portion serves as a second engaging portion that supports the rotating shaft. The plurality of lever members are composed of W, a second lever member, and a third lever member having a rotation axis that intersects the rotation axis or rotation axis of the second and second lever members. The engaging portion on the top side of the button is a second engaging portion that movably supports the rotation shafts of the first and second lever members in the ^ -direction groove formed on the top of the button. According to this configuration, the same effect as that of the conventional key switch device can be obtained. Secondly, the key switch device of the present invention is characterized in that the plurality of lever members are formed in a shape of a frame shape or a frame edge shape in plan view having a pair of arm portions and at least one connection portion connecting the arm portions, At both ends of the arm

84152.DOC -11- Second According to the above structure, without making the lever member arranged in the center, it can be used in the circle covered by the lever member.】 :: Ben: The key switch device is characterized by: A rotation shaft with a rotation angle of η is provided on the lower side of the rotation pump on the top side of the third lever key. According to the above configuration, since the member is disposed on the lower side of the lower lever member of the third lever portion of the rotating shaft where the first rotation axis intersects, the key top can be effectively used to make the key switch device thinner and smaller. The key switch device invented by ^ '纟 is characterized in that the above-mentioned first type ^ turn Γ borrows / forms a pair of hooks formed on the above-mentioned bases that are engaged with each other, and is borrowed by the husband From the above-mentioned pair of hook-shaped rotary bearing parts: the upper and the second systems are longer on the rotation shaft ... Moving the ^ 1 by the brake lever member in the direction of the rotation axis can effectively suppress the shaking of the top of the button. The key switch device of the invention is characterized in that: the third +: a -hook type sliding bearing formed on the base

Lw 'The third lever member is restricted in the lengthwise direction of the rotation axis by the hook-type sliding bearing portion. According to, the third lever member can also be restricted from moving in the direction of the rotation axis, so it is more able to suppress the shaking of the top of the button. Next, the "button switch device of the present invention is characterized in that said button 8L and said third cup member" are engaged between a rotation drawing portion at the top of the button and a shaft portion of the third lever member, and the rotation bearing Department by

84152.DOC • 12- [222652 The pair of arms of the above-mentioned third lever member is sandwiched, and its position is restricted. According to the above configuration, since the positions of the top and bottom lever members of the key are mutually restricted, the shaking of the top of the key can be more effectively suppressed. Secondly, the key switch device of the present invention is characterized in that the top of the key includes a fixing member engaged with the lever member and a key cover attached to the fixing (M & N. According to such a structure, since the tube What are the types of key covers? All of them can be used as common components including fixed parts, lever parts, and base parts, so it can provide a wide range of applications, and key switch devices such as key covers are easy to exchange. A key switch device according to the invention is characterized in that: the guide groove of the shaft portion on the key top side of the second lever member is movably branched between the recessed portion provided on the fixed member and attached to the guide groove. It is formed between the key covers on the fixing member. According to this structure, the engagement of the second and second levers with the top of the key can be performed more easily, and the assembling operation of the key switch device can be made easier. In addition, since the rotation axis of the second rod is held by the key cover and the fixing member, the rotation axis and the key cover can always be kept parallel, which can make the tilt of the key cover more difficult. The keyboard device of this book is characterized by having any of the key switch devices previously used. Because the keyboard device thus constructed includes the key switch device of the previous month, the top of the key of the key switch can be used frequently. $ Lift up and down while keeping the level, when pressing the key switch device, you can guilty of key input to get excellent operating performance. [Embodiment]

84152.DOC -13- [222652 Hereinafter, embodiments of the present invention will be described with reference to the drawings, but the present invention is not limited to the following embodiments. FIG. 1 shows a perspective configuration diagram of a key switch device according to the present invention, and FIG. 2 is an exploded view of the key switch device shown in FIG. 3A is a plan perspective view of the key switch device shown in FIG. 1, and FIG. 3B is a side view of a part of the key switch device shown in FIG. The key switch device 1 shown in these figures is composed of a base plate (base Shao) 2; a first lever member 3 having one end engaged with the base plate 2; a second lever member 4; and a third lever member 5; a fixing member 6 engaged with an end portion on the side opposite to the bottom plate 2 of each of the lever members 3 to 5; and a key cover 10 attached through the fixing member 6. In this embodiment, the key top of the key switch device 1 is constituted by the fixing member 6 and the key cover 10. The bottom plate 2 is a substantially flat plate-shaped member made of a metal material. The bottom plate 2 is rotatably engaged with each of the rod members 3, 4, and 5. The bottom plate 2 is formed by cutting a part of the bottom plate 2 in a cantilever shape to stand up and parallel to each other. The pair of sides are regarded as hook-shaped rotary bearing portions 23, 24 and sliding bearing portions 25 which are formed by cut-ups. Among these sliding bearing portions, the rotary bearing portions 23 and 24 are arranged such that the hook-type front end sides 23a and 24a thereof are opposite to each other, and one cut-and-raised portion of the sliding bearing portion 25 is arranged between the rotary bearing portions 23 and One of the cut-and-raised portions is disposed between the rotary bearing portions 24. The cut-and-raised portions of the rotary bearing portions 23 and 24 and the cut-and-raised portion of the plain bearing portion 25 are orthogonal to each other in a plan view. The bearings 23b and 23b formed on the rotary bearing portions 23 and 23 are formed at coaxial positions with each other. The bearings 24b, 24b on the rotary bearing portions 24, 24 are formed in a coaxial position with each other, and the bearings 25b, 25b formed on the sliding bearing portions 25, 25 are also formed with each other. 84152.DOC -14- [222652 This is formed in a coaxial position on.璧 古 ^^, then, the size of the children's exhibition board 2 can be freely changed in the range of the garden that can engage and support each of the rod members 3 to 5, and the material can also be changed to other materials such as resin materials. . Each of the lever members 3 to 5 is made of a resin material, a metal material, or the like, and supports the fixing member 6 and the key cover 10 so as to be able to move up and down, and has a function of limiting the raising and lowering range to a predetermined range. The first lever member 3 has a plan view and a zigzag shape, and is formed by forming a pair of arm portions 3a, and connecting a shaft portion (connecting portion) 3f on the inner surface side of the front ends of these arm portions. In addition, on the outer surface of the arm portion 3a and the front end portion opposite to the shaft portion 3f, a shaft system engaged with the bottom plate ㈣ rotation drawing portion 23 protrudes from the outside of the lever member 3 and is formed at a coaxial position. These _p3d and 3d are combined in the bearings 23b and 23bJ1 of the rotary bearing units 23 and 23, and the i-th rod member is rotated about the shaft 3 center ^ and rotates to the bottom plate 2. That is, the rotation engagement portions (second engagement portions) 13 and 13 are formed by the rotation bearing portions 23 and 23 of the bottom plate 2 and the shaft portions 3d and 3d of the first lever member 3. Further, a tapered portion 3m is formed on the arm portion 3a of the first lever member 3 and the lower surface side of the front end portion (side of the bottom plate 2). The arm portion 3 & These taper portions 3m determine the angle with respect to the bottom plate 2 of the first rod member 3. When the first rod member stands up to the maximum, these taper portions 3111 come into contact with the upper surface of the bottom plate 2, and have a limited number of The lever member 3 acts as an angle. In addition, a cylindrical shaft portion 3f is erected on the fixing member 6 side of the first lever member 3, and the shaft portion 3f is engaged with a fixing member 6 to be described later. The groove portion 6f (described later) rotates and slides, and the fixed member 6 side of the first lever member 3 becomes a sliding engagement portion (the first engagement engagement) 16 a 〇84152.DOC -15- the second guard member 4 and the first The lever member 3 is formed in the same shape, and includes arm portions such as 4b and a shaft portion (connection portion) 4f connecting the inner surface side of the front end portions. In addition, on the outer side of the arm portion 4a on the side opposite to the shaft portion 4f and the front end portion of the supplement, shaft portions 4d and 4d are protruded at coaxial positions, and these shaft portions M 4d are engaged with the rotary bearing Shao 24. The bearing 24b is rotatable around the shaft portions 4d and 4d with respect to the base plate 2, and the shaft portions 4d and 4d are rotatable within the rotary bearing portion 4. The cylindrical shaft portion is engaged with the groove portion 讦 of the fixing member 6 so as to rotate and slide. Therefore, the second engagement member 4 = the shaft portions 4d and 4d and the rotation bearing portions 24 and 24 of the bottom plate 2 to form the rotation engagement portions (second engagement portions) 14 and 14. The shaft portion 4f and the groove portion of the fixing member 6 form a ㈣ engagement portion (first engagement portion) 16a. In addition, as shown in FIG. 3B, a tapered portion 4 m is formed on the lower surface side of the front end portions of the arm portions 4 a and 4 b, and defines a rising angle of the second lever member 4. The Jin 3 # Shao 5 is formed in the shape of a plane when viewed from the top. In more detail, similar to the arms of the above-mentioned rod members 3 and 4, the arms 5a and 5b that tilt the base plate 2 and erected on these arms The shaft portions 9 on both end portions 5a and% are formed, and round shaft-shaped shafts 5d and 5d are provided on the inner side surfaces of the front end portions of the arm portions 5a and 5b. These shaft portions are rotatably and slidably engaged with the sliding bearing portion 25 formed on the base plate 2. The shaft portion is rotatably supported by the fixed member 6 by a shaft. Therefore, in the third lever member 5, as shown in FIG. 3A, the shaft portions 5d and 5d engaged with the bottom plate 2 are engaged with the sliding bearing portions 25 and 25 to form a sliding engagement portion (the first engagement portion). i5. The shaft portion becomes fixed and the fixing member 6 forms a rotation engaging portion (the first engaging portion). In addition, as shown in FIG. 3, the inner surface sides of the arm portions 5a, 5b of the third lever 5 are not formed,

84152.DOC -16- :: ΓΓΓ Inverted bowl-shaped concave portions 5h, 5h to prevent interference with the opening and closing element 9 which is in the valley. Each of the lever members 3 to 5 described above is provided with a guard member 5 below the assembled key switch members 3 and 4. In addition, the second section is called the pumping section 3f of Shao pieces 3 and 4, and the shaft section of the third lever member $ is arranged. Also, in the bottom plate 2 and the first! In the engaging portion of the second and third guard members 3 and 4, the movement in the direction of the rotation axis is restricted because the guard members 3 and 4 are held by the rotating bearing portions 23 and 24 which are engaged with each other. The lever member 5 sandwiches the sliding bearing portion 25 with the parallel arms 5a and 5b. Therefore, the sliding bearing portion ㈣ restricts β from moving in the lengthwise direction of the rotation shaft of the shaft portion 5d, so it is possible to suppress the # 乾 邵 件 3 on the bottom plate 2 ~ 5 shaking. The fixing member 6 is formed in a concave shape as viewed from the side. More specifically, the fixing member 6 includes a substantially flat plate-shaped substrate portion 6a, and side wall portions 6 standing on both sides of the lower substrate portion 6a. The structure of the above-mentioned lower substrate and the upper substrate portion 仳 and ribs formed by being connected to these side wall objects. That is, the fixing member 6 is provided with a groove portion (a guide groove portion) in a central portion thereof. Further, the upper substrate 4 6b 6b is formed so that one side of the extending direction of the groove portion 6f is more cried than the lower substrate 邙 6a. On the lower side of the protruding portion, two parallel bearings 4 6d and 6d are formed on the bottom plate 2 side. Further, as shown in FIG. I, a groove portion (guide) formed on the central portion of the fixing member 6 Groove) 6f The first and second rods 3 and 4 of the first and second rods 3 and 4 are rotated and slidably engaged with each other to form a sliding engagement portion (i-th engagement portion). The shaft portion 5c of the 3 cup member 5 is inserted into the bearing portion 6d, "to form a rotational engagement.

84152.DOC -17- 1222652 Shao (Section 7) 16d. In addition, the shaft portions 3 £ and 4f of the second and second guard members 3 and 4 are orthogonal to the shaft portion 5e of the third rod 5 in a plan view, and a shaft material is arranged below the shaft portion 4f. . In this way, since the shaft portion is arranged on the lower side, the space under the key cover 10 can be effectively used, and the thickness of the key switch device 1 can be made easier. The switching element 9 is composed of an inverted cup-shaped movable portion 9b made of an elastic tree material such as rubber, and a contact portion provided on the inner surface of the inverted cup. The wide-open side is directed toward the bottom plate 2 side. The device is mounted on the bottom plate surrounded by the base plate portion 63 and the rod members 3 to 5 of the fixed shawl 6. The above-mentioned contact point 9a is provided opposite to a fixed contact point (not shown) provided on the base plate 2. In addition, the 'stomach switch element 9 has a role of pushing the fixing member 6 to the raised position during use. In addition, the switching element 9 may be replaced with a thin-plate switch in which the respective contacts of the upper plate formed by the movable contact and the lower plate formed by the fixed contact are stacked on the upper or lower side of the base plate 2 to face each other. The key cover 10 is formed into a large domain and a platform shape by forming processing or the like, and becomes an inverted boat shape which is open below. In addition, digital or alphabetical characters (not shown) are formed on the printed matter by printing. The key cover ㈣ is connected to the fixing member 6 to form the top of the key of the key switch device. Then, the shaft portions 3f and 犲 of the lever members 3 and 4 which can be used first are engaged in a space formed by the key cover 10 and the groove portion 6 of the fixing member 6. Thereby, the key cover 10 and the fixing member 6 do not incline in the rotation direction of the shaft portion 5c of the third lever member, and the lower substrate portion 6a of the fixing member 6 is formed by the first and second lever members 3, 4. The arm portions 3a, 3b, 4a, and 4b are clamped to restrict the movement of the fixing member 6 in the longitudinal direction of the shaft portions 3f and 4f.

84152.DOC -18-[222652 The key switch device of the present embodiment provided with the above-mentioned components is shown in FIG. 1 when it is not in use, and the member 6 and the key cover are formed by the elastic force of the switch element 9. It was pushed up. When Yumeno Noda is input from a key and is pressed from the upper side of the key cover 10, the fixing member 6 connected to the key cover 10 is lowered in synchronization. Next, the switching element 9 pressed on the τ plane side of the fixing member 6 is deformed. The contact portion inside the switching element 9 comes into contact with the fixed contact on the base plate 2 and the switch is turned on. When the finger of the key cover 10 is pressed, When leaving, the elastic restoring force fixing member 6 and the key cover 10 of the switching element 9 are pushed up again. As the key cover 10 is moved up and down, each of the lever members 3 to 5 operates as follows. The symmetrically arranged lever member 3 and the second lever member 4 move the engaging portion with the fixing member 6 downward, and the arm portions 3a, 2a, 4a, and the rotation bearing portion 23, which are engaged with the fixed shaft, The shaft portions 3d and 4d on 24 are centered and move obliquely. Further, the shaft portion lamp and the bamboo which are engaged with the groove portion 6 £ of the fixing member 6 are guided by the groove portion 6f and move horizontally in directions approaching each other. In addition, the arm portions 5a, 5b of the third lever member 5 are inclined to move around the shaft portion 6 (the shaft portion 5c of 1) engaged with the fixing member 6, and along with this, they are inside the sliding bearing Shao 25 of the bottom plate 2. When sliding, the shaft portions 5d and 5d are moved horizontally. As described above, the key switch device 1 according to the present embodiment is a key switch device having a conventional χ-shaped support structure, because a rotary shaft is not formed at the center of the lever member. Therefore, even if the length of each lever member 3 to 5 is shortened in order to reduce the size and thickness of the key switch device, the smoothness of the lifting operation of the key switch device is not impaired, and each lever member 3 to 5 can be made shorter than now. , Smaller. Therefore, if a key switch equipped with this embodiment is installed

84152.DOC -19- 1222652 Setting 1 as an input means can easily achieve miniaturization and thinness of the keyboard or electronic equipment without impairing the operability at the time of key input. In addition, the key switch device 丨 according to this embodiment can prevent the keys from being knocked out without fail while keeping the key cover 10 horizontally moved up and down, and can reliably perform key input. This is because the structure includes the lever members 3 to 5 described above, so that the key cover 10 (fixing member 6) does not tilt even when it is pressed on the peripheral portion of the key cover 10. That is, if it is determined that the third lever member 5 is not provided, among the second and third lever members 3 and 4 which are symmetrically arranged left and right, the shaft portion 3 on the side of the fixed member 6 and the direction of rotation of the bamboo are fixed. The member 6 can be tilted. In this embodiment, since the lever member $ is provided, the direction of rotation to the above-mentioned shafts 3f and 4f is restricted by the shaft members in the direction intersecting these shaft portions 3f and 4f. Of tilt. In addition, the key switch device 1 of the present embodiment is hardly shaken in the horizontal direction of the key top π, and can obtain excellent operation performance when a key is input. This is because a structure capable of suppressing instability in horizontal insertion is adopted in the engaging portions of the lever members 3, 5, the fixing member 6, and the bottom plate 2. Therefore, it is not necessary. That is, in the engagement portion between the bottom plate 2 and the lever member 3, first, the bearing portions 23 and 24 are formed by a pair of parallel cut-and-raised portions, and are engaged at positions sandwiched by the bearing portions a and 24. Movement of the rod members 3 and 4 in the longitudinal direction of the shaft is restricted by the bearing portions 23 and 24. In the third rod member 5, the sliding bearing portion 25 is sandwiched by the arm portions 5a and 5b of the rod member 5 Movement of the rod member 5 in the longitudinal direction is restricted. On the other hand, in the engagement portion of the fixing member 6 and the third lever member 5, since the third lever member ㈣ arms 5a, 5b are sandwiched between the bearings ㈣, 6d of the fixing member 6, the fixing member 6

84152.DOC -20- 1222652 Restricts movement in the longitudinal direction of the rotation axis of the lever member 5. Thus, according to the key switch device 1 of this embodiment, since the top of the key is not tilted when the top of the key is raised and lowered during key input, the top of the key is hardly shaken, so the key switch is not knocked empty, and an excellent one can be obtained. Operational performance. (Keyboard Device) FIG. 6 is a perspective view showing an example of a keyboard device provided with the key switch device of the above-mentioned embodiment. The keyboard device 100 includes a plurality of key switch devices 102 arranged on the casing 101. According to the keyboard device 100 of this embodiment configured as described above, the horizontal position of the top of the key can be maintained during the ascending and descending operation of the top of the key. Furthermore, since the key switch device 102 is hardly shaken at the top of the key, Therefore, during key input, no keystroke is performed, and key input can be performed quickly and appropriately. In addition, in a large-sized key switch device 103 such as a blank key, a plurality of constituent parts of the key cover 10 excluding the key switch device i shown in Fig. 1 may be arranged at the lower portion of the horizontal key cover. (Effects of the Invention) As described above, the structure of the key switch device of the present invention will be described in detail .... Now, at the present, qw is the heart, and it has a .base #, so that the -end side can be movably engaged with the base. A plurality of lever members; by engaging with the other end side of the lever member, the key top supported by the base to be lifted and lowered; and a switch 开关 which performs a switching operation as the key top is raised; The engaging portions at both ends of the member are respectively formed with a screw that allows the lever member to rotate freely in its rotation surface.

The rotating shaft, the engagement member of the rod member, and the K-shaft of the T-series are used as the approximate engaging portions of the above-mentioned base to movably support the rotating shaft.

84152.DOC -21- Bayonet 4 is the second engaging part that supports the above-mentioned rotating sleeve as the shaft. The rotation of the second rod member is composed of the rotating and the second binding member. "The first and second cup members have an engaging part on the top side of the button as a rotation axis of the second rod member. And slidingly engage the first engaging portion formed in the guide groove on the top of the upper U key, so it is easier to miniaturize and thinner than the key switch device with the previous X-shaped support, and further: It does not impair the operation during key input during miniaturization and thinness. In addition, it prevents the top of the key from shaking in the horizontal direction. The outer edge of the key top also prevents the top of the key. It does not fall in a tilted state, but can be kept almost horizontally. Therefore, the 'button_device according to the present invention can obtain excellent results because there is no empty knock when key input is performed, and there is no shakyness at the top of the key'. Operational performance: Since the key switch device of the present invention is provided as described above, the keyboard device related to the present invention can be miniaturized more easily. A keyboard device with excellent operation performance. The drawing briefly illustrates FIG. 1 is a perspective structural view of a key switch device according to an embodiment of the present invention. FIG. 2 is an exploded perspective view of the key switch device shown in FIG. 1. The top perspective view of the key switch device shown in the figure is a side view showing a partial cross section.

84152.DOC -22- [222652 Figure 4 is an exploded perspective view of a keyboard device with a conventional key switch device. 5 is a sectional view of the key switch device shown in FIG. 4. Fig. 6 is a plan view showing an example of a keyboard device including a key switch device of the present invention. Explanation of the symbols of the drawings 1 ... Key switch device; 2 ... Base plate (base); 3 ... 1st lever member; 4 ... 2nd lever member; 5 ... 3rd lever member; 3a, 3b , 4a, 4b, 5a, 5b ... arm parts; 3 d, 4 d, 5 d ... shaft parts (rotary shafts); 3 f, 4 f, 5 c ... shaft parts (connection parts); 23, 24, 6d ·· rotary bearing section; 2 5 ... slide bearing section; 6f ... groove section (guide groove); 13,14,16d ·· rotational engagement section (second engagement section); 16a, 15 ... sliding Engaging part (1st engaging part); 6 ... Fixed part (top of key); 9 ... Switch element; 10 ... Key cover (top of key). -twenty three-

84152.DOC

Claims (1)

[222652] Patent application scope: A key switch device characterized in that it is provided with a plurality of lever members which movably engage one end side on the base portion; and the other-end side of the lever member And the key top supported by the base can be raised and lowered, and the switch element that performs the switching operation in accordance with the lifting action of the top of the key; the engaging parts at both ends of the lever member are respectively formed with the lever member at the The rotation axis that can rotate freely in its rotation surface: one engagement portion of the lever member serves as the first engagement portion that movably supports the rotation shaft to the base or the top of the key, and the other engagement portion = A second engaging portion that pivotally supports the rotation shaft, the plurality of lever members are a second lever member and a third type having a rotation shaft that intersects with the rotation axis or rotation axis of the second lever member The second and second lever members are constituted by engaging portions on the key top side of the key rods as a guide groove that movably engages the rotation shafts of the i and second lever members on the key tops. The first engaging portion. 2. The key switch device according to item 1 of the patent application range, wherein the plurality of lever members are formed into a rzr shape or a frame edge shape in a plan view having a pair of arm portions and at least one connection portion connecting the arm portions, The arms and shafts are provided on both ends of the arm portion. 3. The key switch device according to item 1 of the patent application scope, wherein a rotary shaft on the key top side of the third talent is arranged below the rotary shaft on the key top side of the first and second lever members. 4. The key switch device according to item 2 of the scope of patent application, wherein the first and second sample pieces are formed by a pair of hooks formed on each of the above-mentioned bases. With the above-for the fishing-type rotating bearing part, the position of u 1 # 2 is limited to the length of its rotation axis. 0: The key switch device of the second item of Ming Patent Fanyuan, where the third item is stuck = The hook-shaped sliding bearing portion is sandwiched on the base portion, and the L,: and the third lever member are restricted in position by the hook-shaped sliding bearing portion in the length direction of the rotation axis. The key switch device for the second item of Fanyuan, in which the key top part # 3 is engaged between the rotary bearing part on the top of the key and the shaft part of the sample part, and the rotary drawing part is From the upper brother, the dry part-pinched the arm, and was restricted in its position. The key switch device according to the first item of Li Fanyuan, wherein the key top is a fixed part engaged with the guard part and a key cover attached to the fixed part. For example, the key switch device of item 7 of the patent claim, wherein the above-mentioned guide groove on the top shaft of the key top side of the key is movably supported on the first, m 9 buckle, ^ ^ ^, and the like. The recessed portion on the fixing member is formed between a key cover attached to the mounting member. The key dish device is characterized by being provided with a patent-pending key switch device. _ 罘 ,, right