Short-stroke piano-key switch
By introducing guide grooves and reset push springs into the key switch, short-stroke operation and fast response are achieved, solving the problems of long pressing stroke, slow response and large structural space occupation of existing key switches, improving the convenience and comfort of operation, and making it suitable for modern electronic devices.
Patent Information
- Application Number
- CN202423150227.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-20
- Publication Date
- 2025-11-25
- Estimated Expiration
- 2034-12-20
AI Technical Summary
Existing key switches suffer from problems such as long pressing stroke, slow response speed, large structural space occupation, and inconvenient operation, making it difficult to meet the miniaturization and high response requirements of modern electronic devices.
A short-stroke piano key switch was designed. By setting a guide groove on the key shaft and installing a conductive plate, the conductive plate is pushed downward by a reset spring to achieve rapid circuit connection and disconnection. Combined with a locking plate and spring structure, the opening and closing stroke of the key is shortened.
The button opening and closing travel is significantly shortened, improving ease of operation and comfort. The structural height is reduced, making it suitable for the miniaturization design of modern electronic devices and enhancing the user experience.
Smart Images
Figure CN223598592U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a switch, in particular to a short stroke piano key switch. BACKGROUND
[0002] Piano key switch is a common mechanical structure, widely used in various electronic devices, musical instruments, keyboards and other devices. This kind of switch realizes switch action and circuit conduction by pressing the key cap to make the key shaft down, with the characteristics of simple structure and low cost. However, the existing piano key switch still has some obvious defects in practical application, mainly in the following aspects:
[0003] 1. Long pressing stroke: the existing piano key switch generally adopts the traditional long stroke design. In order to make the key shaft press down to the conduction position, the user needs to press the key cap with large amplitude. This not only leads to the need to exert large force in the operation process, but also the long pressing stroke affects the efficiency and comfort of operation.
[0004] 2. Slow response speed: due to the long pressing stroke, the switch response time is relatively slow, especially in the scene that needs to be operated quickly and repeatedly, it is difficult to meet the user's requirements for high sensitivity and high response. For example, in the case of electronic musical instruments or game keyboard that need to be quickly tapped, the long stroke design of the existing switch obviously affects the user experience.
[0005] 3. Large structure space occupation: in the structure of traditional piano key switch, the pressing stroke of key shaft is deep, which leads to the large installation height of the whole switch and the large structure space occupation, which is not conducive to the miniaturization design of equipment and is difficult to meet the demand of modern electronic equipment for compact structure.
[0006] 4. Inconvenient operation: in long time use, due to the need of deep pressing operation, the user's fingers are easy to fatigue, especially in continuous tapping or high intensity operation, the comfort is poor, which further affects the operation experience, so it is necessary to make further improvement. CONTENT OF THE UTILITY MODEL
[0007] The utility model aims at overcoming the shortcomings of the prior art, providing a short stroke piano key switch with simple structure, convenient use, significantly reducing pressing stroke, improving response speed, reducing structure height, and improving the convenience and comfort of operation.
[0008] The utility model discloses a short stroke piano key switch which comprises a base, a containing cavity arranged in the base, a locking plate slidingly installed on the side wall of the containing cavity, a panel covering the opening of the containing cavity, a plurality of mounting holes formed on the panel, a key shaft located in the containing cavity, a cap shaft extending upward from the top of the key shaft, a spring arranged between the panel and the cap shaft, and the cap shaft is always pushed upward.
[0009] The side of the key shaft towards the locking plate is provided with a locking column, and the locking column is hung or separated from the locking groove formed on the locking plate to realize the opening or closing of the key.
[0010] A guide groove is formed through the body of the key shaft, and a conductive sheet is installed in the guide groove, and a reset push spring is arranged between the conductive sheet and the guide groove to always push the conductive sheet downward.
[0011] The containing cavity is provided with a static contact cooperating with both ends of the conductive sheet, and the key shaft is pressed downward to push the conductive sheet downward to contact the static contact to realize the conduction of the circuit.
[0012] Further, the cross-sectional area of the key shaft is smaller than the opening area of the mounting hole to limit the key shaft to slide at the bottom of the panel.
[0013] Further, the cap shaft is provided with a spring stopper on the cylindrical surface, and a spring is sleeved on the cap shaft, the upper end of the spring is pressed on the spring stopper, and the lower end of the spring is pressed on the outer end surface of the panel.
[0014] Further, the cap shaft is provided with a spring stopper on the cylindrical surface, and a spring is sleeved on the cap shaft, the upper end of the spring is pressed on the spring stopper, and the lower end of the spring is pressed on the outer end surface of the panel.
[0015] Further, the conductive sheet is in the shape of "I" with a narrow middle and wide sides, and the width of the guide groove is smaller than the width of the two sides of the conductive sheet.
[0016] Further, the bottom of the guide groove is provided with a mounting groove penetrating the lower end surface of the key shaft.
[0017] Further, the locking plate is slidingly installed in a sliding groove on the side wall of the containing cavity, a locking spring is arranged between the sliding groove and the locking plate, and the locking spring always pushes the locking plate to move in the locking direction.
[0018] The utility model discloses a short stroke piano key switch which comprises a base, a containing cavity arranged in the base, a locking plate slidingly installed on the side wall of the containing cavity, a panel covering the opening of the containing cavity, a plurality of mounting holes formed on the panel, a key shaft located in the containing cavity, a cap shaft extending upward from the top of the key shaft, a spring arranged between the panel and the cap shaft, and the cap shaft is always pushed upward.
[0019] 2. The utility model discloses a guiding groove is set up on the key shaft, and the conducting sheet is installed in the guiding groove, and reset push spring is arranged between the conducting sheet and the guiding groove. Reset push spring always pushes the conducting sheet to move downward, so that the conducting sheet is always in the pre-pressing state. When the user presses the key shaft, the conducting sheet can quickly contact the static contact downward, so that the circuit conduction is realized. This structure design greatly shortens the opening and closing stroke of the key, and the user can complete the operation by lightly touching the key, and the operation convenience and comfort are obviously improved.
[0020] 3. Because the stroke of the key switch is short, the conducting sheet quickly returns to the original position under the action of the reset push spring, so that the quick response of the key is realized.
[0021] 4. The utility model discloses an integrated setting of the conducting sheet and the key shaft, and reset is carried out through reset push spring, so that the whole switch structure is more compact. The descending distance of the key shaft is shortened, the overall height of the switch is effectively reduced, the occupied space of the structure is reduced, and it is very suitable for the miniaturization design demand of modern electronic equipment.
[0022] 5. Because the stroke of the key is short and the pressing required force is small, the user does not need to exert too much force when operating, and the opening or closing of the switch can be realized by lightly touching. This light touch operation can effectively reduce finger fatigue when used for a long time, and the user experience is significantly improved. BRIEF DESCRIPTION OF DRAWINGS
[0023] Figure 1 It is the structure assembly drawing of the utility model.
[0024] Figure 2 , 3 It is the structure exploded view of the utility model.
[0025] Figure 4 , 5 It is the hidden base and the structure schematic diagram of the panel of the utility model.
[0026] Figure 6 It is the partial structure enlarged view of the utility model Figure 5 . DETAILED DESCRIPTION
[0027] The utility model will be specifically further explained in combination with the drawings. A short stroke key switch, which comprises a base 1, a containing cavity 2 arranged in the base 1, a locking plate 3 slidably mounted on the side wall of the containing cavity 2, an opening of the containing cavity 2 is covered with a panel 4, a plurality of mounting holes 41 are formed in the panel 4, a key shaft 5 is located in the containing cavity 2, a cap shaft 51 extends upward on the top of the key shaft 5, the cap shaft 51 extends out of the panel 4 through the mounting hole 41, a spring 52 is arranged between the panel 4 and the cap shaft 51, and the cap shaft 51 is always pushed upward.
[0028] The key shaft 5 is provided with a locking column 53 on the side facing the locking plate 3, and the locking column 53 is hung or separated from the locking groove 31 on the locking plate 3, so as to realize the opening or closing of the key.
[0029] The key shaft 5 is provided with a guide groove 54 penetrating the body of the key shaft 5, and a conductive sheet 6 is installed in the guide groove 54. A reset push spring 61 is arranged between the guide groove 54 and the conductive sheet 6, and the reset push spring 61 pushes the conductive sheet 6 to always move downward.
[0030] The accommodating cavity 2 is provided with a static contact 7 matched with both ends of the conductive sheet 6. After the key shaft 5 is pressed downward, the conductive sheet 6 is pushed to move downward and contact the static contact 7, so as to realize the conduction of the circuit.
[0031] In one of the embodiments, the cross-sectional area of the key shaft 5 is smaller than the opening area of the mounting hole 41, so as to limit the key shaft 5 to slide at the bottom of the panel 4.
[0032] In one of the embodiments, the cylindrical surface of the cap shaft 51 is provided with a spring stopper 55, and a spring 52 is sleeved on the cap shaft 51, with the upper end bearing on the spring stopper 55 and the lower end bearing on the outer end surface of the panel 4.
[0033] In one of the embodiments, the surface of the cap shaft 51 is further sleeved with a key cap 56.
[0034] In one of the embodiments, the conductive sheet 6 is in the shape of "I" with the middle narrow and the two sides wide, and the width of the guide groove 54 is smaller than the width of the two sides of the conductive sheet 6.
[0035] In one of the embodiments, the bottom of the guide groove 54 is provided with a mounting groove 57 penetrating the lower end surface of the key shaft 5.
[0036] In one of the embodiments, the locking plate 3 is slidingly installed in the sliding groove on the side wall of the accommodating cavity 2, and a locking spring 32 is arranged between the sliding groove and the locking plate 3, and the locking spring 32 pushes the locking plate 3 to always move in the locking direction.
[0037] Working principle:
[0038] In the static state, the key shaft 5 is slidingly limited in the accommodating cavity 2 through the mounting hole 41 of the panel 4.
[0039] The key shaft 5 is provided with a guide groove 54 penetrating the body of the key shaft 5, and a conductive sheet 6 is installed in the guide groove. A reset push spring 61 is located between the guide groove 54 and the conductive sheet 6, and continuously pushes the conductive sheet 6 downward, so that the conductive sheet is always in a pre-pressed state.
[0040] Under the action of the reset push spring, the lower end of the conductive sheet is slightly separated from the static contact 7, and the circuit is in an open state.
[0041] Pressing process realizes circuit conduction:
[0042] When the user presses the cap shaft 51 of the key shaft 5, the key shaft slides downward, compresses the spring 52 between the panel 4 and the cap shaft, and simultaneously moves the conductive sheet 6 in the guide groove 54 downward with the key shaft.
[0043] Since the conductive sheet 6 is always pushed downward by the reset spring 61, when the key shaft 5 is pressed to a certain position, the lower end of the conductive sheet 6 contacts the static contact 7, and the circuit is rapidly conducted. At the same time, the locking column 53 on the side wall of the key shaft 5 is hung and buckled with the locking groove 31 on the locking plate 3, and the key shaft is kept in the pressed and locked state.
[0044] This design makes the opening and closing stroke of the key shorter, and the user only needs to lightly touch the key shaft to realize circuit conduction, and the operation is more convenient.
[0045] Reset process disconnects the circuit:
[0046] When the user releases the pressed or reset key shaft 5, the locking column 53 on the side wall of the key shaft 5 is extruded with the side wall of the locking groove on the locking plate 3, and the locking plate is driven to move, so as to force the key shaft which has been locked to be separated from the locking groove, and the spring 52 between the panel 4 and the cap shaft 51 pushes the key shaft to rebound upward, and the key shaft returns to the initial position.
[0047] At the same time, the reset spring 61 in the guide groove 54 pushes the conductive sheet 6 to always return downward, so that the lower end of the conductive sheet rapidly separates from the static contact 7, and the circuit is disconnected.
[0048] This structural design makes the conductive sheet quickly recover under the action of the reset spring, and the key responds quickly.
[0049] Compared with the traditional technology, the key stroke in the case is short, and the key can be operated by lightly touching. The reset spring 61 always pushes the conductive sheet 6 downward, so that the conductive sheet is always located at the bottom of the key shaft, and the conductive sheet can quickly contact the static contact 7 to realize circuit conduction. This design significantly shortens the opening and closing stroke of the key, and the user does not need to press deeply, but only needs to lightly touch to complete the switching operation, thereby improving the convenience and comfort of the operation.
[0050] Since the reset spring always pushes the conductive sheet downward, the short stroke design of the key is realized, the key can be operated by lightly touching, the response is fast, the structure is compact, and the operation is comfortable, the technical defects of long stroke, laborious operation and slow response of the existing key switch are overcome, and therefore the key switch can be widely used.
[0051] The basic principle and main features of the present application and the advantages of the present application are shown and described above. Those skilled in the art should understand that the present application is not limited by the above examples, and the above examples and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the present application.
Claims
1. A short-stroke piano key switch, comprising a base (1), a receiving cavity (2) disposed within the base (1), a locking plate (3) slidably mounted on the side wall of the receiving cavity (2); a panel (4) covering the opening of the receiving cavity (2), the panel (4) having a plurality of mounting holes (41), a key shaft (5) located within the receiving cavity (2), a cap shaft (51) extending upward from the top of the key shaft (5), the cap shaft (51) extending out of the panel (4) through the mounting holes (41), and a spring (52) disposed between the panel (4) and the cap shaft (51) to push the cap shaft (51) to always spring upward; The button shaft (5) is provided with a locking post (53) on the side facing the locking plate (3). The locking post (53) and the locking plate (3) are provided with a locking groove (31) to hook or separate, so as to realize the opening or closing of the button. Its features are: The key shaft (5) has a guide groove (54) through its body. A conductive sheet (6) is installed in the guide groove (54). A reset push spring (61) is provided between the conductive sheet (6) and the guide groove (54). The reset push spring (61) pushes the conductive sheet (6) to move downwards continuously. The cavity (2) is provided with stationary contacts (7) that cooperate with both ends of the conductive sheet (6). After the key shaft (5) is pressed down, it pushes the conductive sheet (6) to move downward and contact the stationary contacts (7) to realize the conduction of the circuit.
2. A short-stroke piano key switch according to claim 1, characterized in that: The cross-sectional area of the key shaft (5) is smaller than the opening area of the mounting hole (41), thus restricting the key shaft (5) to slide at the bottom of the panel (4).
3. A short-stroke piano key switch according to claim 1, characterized in that: A spring stop (55) is provided on the cylindrical surface of the cap shaft (51). The spring (52) is fitted on the cap shaft (51), with its upper end pressing on the spring stop (55) and its lower end pressing on the outer end surface of the panel (4).
4. A short-stroke piano key switch according to claim 1, characterized in that: The surface of the cap shaft (51) is also fitted with a button cap (56).
5. A short-stroke piano key switch according to claim 1, characterized in that: The conductive sheet (6) is an "I" shape that is narrow in the middle and wide on both sides, and the width of the guide groove (54) is smaller than the width of the two sides of the conductive sheet (6).
6. A short-stroke piano key switch according to claim 5, characterized in that: The bottom of the guide groove (54) is provided with a mounting groove (57), which passes through the lower end face of the key shaft (5).
7. A short-stroke piano key switch according to claim 1, characterized in that: The locking plate (3) is slidably installed in the sliding groove located on the side wall of the accommodating cavity (2). A locking spring (32) is provided between the sliding groove and the locking plate (3). The locking spring (32) pushes the locking plate (3) to move in the locking direction at all times.