CN215770949U

CN215770949U - Key structure and electronic control device

Info

Publication number: CN215770949U
Application number: CN202122281097.6U
Authority: CN
Inventors: 徐益军
Original assignee: Shanghai United Imaging Healthcare Co Ltd
Current assignee: Shanghai United Imaging Healthcare Co Ltd
Priority date: 2021-09-18
Filing date: 2021-09-18
Publication date: 2022-02-08
Anticipated expiration: 2031-09-18

Abstract

In the key structure and the electronic control device of the present invention, the key structure includes: a housing: the keycaps are movably arranged along the preset direction and are arranged with the shell along the preset direction; each group of guide structures comprises two rod assemblies, each rod assembly comprises a first rod and a second rod which are coplanar and not perpendicular, and the axial direction of the first rod is perpendicular to the preset direction; the first rod is arranged on the shell; the second rod is connected with the keycap and is configured to rotate around the central axis of the first rod along with the movement of the keycap along the preset direction; wherein the rotation directions of the second rods of the two rod assemblies are opposite. According to the configuration, the two second rods rotate around the corresponding first rods, and the rotation directions are opposite, so that the consistency of pressing strokes of all parts of the keycap can be greatly improved when a user presses any point on the keycap; two second poles can offset each other along the displacement of the direction of predetermineeing of perpendicular to at the rotation in-process, are favorable to reducing the volume of shaking of key cap.

Description

Key structure and electronic control device

Technical Field

The present invention relates to a key structure and an electronic control device.

Background

In the prior art, a key of an electronic control device generally needs to be provided with a guide column or a guide rib to guide the key, so that the key can have better stability when being pressed and moved. At present, cases adopting guide columns or guide ribs still have relatively large shaking amount, which is not beneficial to improving user experience; when any point of the keycap is pressed, the pressing strokes of all the positions of the keys are inconsistent, and the operation hand feeling of a user is influenced.

In addition, the keys applied to the electronic control device need higher precision, are usually formed by mold-opening injection molding, and have higher precision requirement on the mold, and particularly, for large-scale equipment (such as large-scale medical equipment) using the keys, the development cycle of the equipment is long, if a designer opens the mold earlier to meet the requirement of a human-computer interaction product, once the design requirement of the human-computer interaction changes, the related injection mold may be scrapped, thereby increasing the design budget. In addition, the period from the injection mold opening to the product molding is generally three months, which is not beneficial to reducing the time cost.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a key structure and an electronic control device, and aims to solve the problems that the user experience is influenced due to the fact that the key shaking amount is large and the pressing strokes of the keys are inconsistent when the conventional keys are pressed.

To solve the above technical problem, according to one aspect of the present invention, there is provided a key structure applied to an electronic control device, the key structure including:

a housing;

the keycaps are movably arranged along a preset direction and are arranged with the shell along the preset direction;

each group of guide structures comprises two rod assemblies, each rod assembly comprises a first rod and a second rod which are coplanar and non-perpendicular, and the axial direction of the first rod is perpendicular to the preset direction;

the first lever is mounted on the housing;

the second rod is connected with the keycap and is configured to rotate around the central axis of the first rod along with the movement of the keycap along the preset direction;

wherein the rotation directions of the second rods of the two rod assemblies are opposite.

Optionally, the first rods corresponding to the two rod assemblies are parallel to each other, and a plane where the first rods corresponding to the two rod assemblies are located is perpendicular to the preset direction.

Optionally, the housing includes a first mounting aperture for receiving the first rod.

Optionally, the key structure includes a fixing block, an assembly groove is formed in the housing, and the fixing block and the assembly groove are matched to form the first assembly hole.

Optionally, the key cap includes a second assembly hole, and the second rod is movably accommodated in the second assembly hole along a radial direction of the second assembly hole.

Optionally, the key structure includes a limiting member, and the limiting member is located on the housing and is used for limiting the rod assembly to move along the axial direction of the first rod.

Optionally, the second rod comprises a first subsection and a second subsection which are formed by segmenting along the axial direction of the second rod.

Optionally, the rod assembly includes a third rod and a fourth rod, the first sub-segment is connected to the first rod through the third rod, and the second sub-segment is connected to the first rod through the fourth rod.

Optionally, the housing and the lever assembly are of a frame construction.

Based on another aspect of the present invention, the present invention further provides an electronic control device, which includes the key structure as described above, where the key structure further includes an elastic bottom key, carbon key particles, a first circuit board, a metal dome sheet, and a second circuit board, the keycap, the elastic bottom key, the housing, the first circuit board, and the second circuit board are sequentially arranged along the preset direction, the carbon key particles are disposed at an end of the elastic bottom key facing the first circuit board, and the metal dome sheet is disposed on the second circuit board.

In summary, in the key structure and the electronic control device provided in the present invention, the key structure includes: a housing: the keycaps are movably arranged along a preset direction and are arranged with the shell along the preset direction; each group of guide structures comprises two rod assemblies, each rod assembly comprises a first rod and a second rod which are coplanar and non-perpendicular, and the axial direction of the first rod is perpendicular to the preset direction; the first lever is mounted on the housing; the second rod is connected with the keycap and is configured to rotate around the central axis of the first rod along with the movement of the keycap along the preset direction; wherein the rotation directions of the second rods of the two rod assemblies are opposite. According to the configuration, the second rods of the two rod assemblies rotate around the central axes of the corresponding first rods along with the movement of the keycap, and the rotating directions of the two second rods are opposite, so that the consistency of pressing strokes of the keycap at each position can be greatly improved when a user presses any point on the keycap, and the stability of the keycap in the moving process is improved; two second poles at the rotation in-process, offset each other along the displacement of the direction of predetermineeing of perpendicular to, are favorable to reducing the volume of shaking of key cap. In addition, compared with the existing guide post or guide rib, the guide post or guide rib has a simpler structure and is easier to design and realize.

Drawings

It will be appreciated by those skilled in the art that the drawings are provided for a better understanding of the utility model and do not constitute any limitation to the scope of the utility model. Wherein:

FIG. 1 is a schematic diagram of a key structure according to an embodiment of the utility model;

FIG. 2 is a cross-sectional view taken along A-A of FIG. 1;

FIG. 3 is a schematic view of a key cap and rod assembly of a key configuration according to one embodiment of the present invention;

FIG. 4 is a schematic view taken along the line B-B in FIG. 3;

FIG. 5 is a sectional view of a key structure along a predetermined direction according to an embodiment of the present invention.

In the drawings:

10-a keycap; 11-a second assembly hole;

20-a housing; 21-an extension; 210-a first assembly aperture; 211-assembly grooves; 212-fixed block;

30-a rod assembly; 31-a first rod; 32-a second rod; 321-a first sub-segment; 322-a second subsection; 33-a third rod; 34-fourth bar;

40-a limit stop; 50-elastic bottom key; 60-key carbon granules; 70-a first circuit board; 80-hand feeling increasing blocks; 90-metal dome sheet; 100-a second circuit board; z-the preset direction.

Detailed Description

To further clarify the objects, advantages and features of the present invention, a more particular description of the utility model will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings. It is to be noted that the drawings are in greatly simplified form and are not to scale, but are merely intended to facilitate and clarify the explanation of the embodiments of the present invention. Further, the structures illustrated in the drawings are often part of actual structures. In particular, the drawings may have different emphasis points and may sometimes be scaled differently.

As used in this application, the singular forms "a", "an" and "the" include plural referents, the term "or" is generally employed in a sense including "and/or," the terms "a" and "an" are generally employed in a sense including "at least one," the terms "at least two" are generally employed in a sense including "two or more," and the terms "first", "second" and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit to the number of technical features indicated. Thus, features defined as "first", "second" and "third" may explicitly or implicitly include one or at least two of the features, "one end" and "the other end" and "proximal end" and "distal end" generally refer to the corresponding two parts, which include not only the end points, but also the terms "mounted", "connected" and "connected" should be understood broadly, e.g., as a fixed connection, as a detachable connection, or as an integral part; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. Furthermore, as used in the present invention, the disposition of an element with another element generally only means that there is a connection, coupling, fit or driving relationship between the two elements, and the connection, coupling, fit or driving relationship between the two elements may be direct or indirect through intermediate elements, and cannot be understood as indicating or implying any spatial positional relationship between the two elements, i.e., an element may be in any orientation inside, outside, above, below or to one side of another element, unless the content clearly indicates otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

The utility model provides a key structure and an electronic control device, which are used for solving the problems that the user experience is influenced due to the fact that the key shaking amount is large and the pressing strokes of all parts of the key are inconsistent when the conventional key is pressed.

The following describes the key structure of the present embodiment with reference to the drawings.

As shown in fig. 1 and fig. 3, fig. 1 is a schematic diagram of a key structure according to an embodiment of the present invention, fig. 3 is a schematic diagram of a key cap and a rod assembly of the key structure according to the embodiment of the present invention, and the embodiment provides a key structure applied to an electronic control device, the key structure including: a key cap 10, which is movably arranged along a preset direction Z, i.e. the key cap 10 is pressed when a user applies pressure, and the key cap 10 is reset by moving in the opposite direction when the user is not applied, wherein the preset direction Z generally refers to a direction perpendicular to the key cap 10, i.e. a vertical direction of the key cap 10, and the preset direction Z is a direction perpendicular to the paper in fig. 1 and 3; the housing 20 and the keycap 10 are arranged along a preset direction Z, in one embodiment, the housing 20 surrounds the circumference of the keycap 10, the keycap 10 moves along the outer wall of the housing 20 towards the inner wall after being pressed, so that the keycap 10 is recessed compared with the housing 20, and the keycap 10 generally moves along the inner wall of the housing 20 towards the outer wall when being reset; at least one set of guiding structures, each set of guiding structures comprising two rod assemblies 30, said rod assemblies 30 comprising a first rod 31 and a second rod 32, said first rod 31 being coplanar and non-perpendicular to said second rod 32, the axial direction of said first rod 31 being perpendicular to said preset direction Z; the first rod 31 is located on the housing 20 (e.g., mounted on an inner wall of the housing 20); the second rod 32 is connected with the key cap 10 and configured to rotate around the central axis of the first rod 31 with the movement of the key cap 10 along the preset direction Z; in order to satisfy the condition that the rotation directions of the second rods 32 of the two rod assemblies 30 are opposite, that is, one of the second rods 32 rotates clockwise, and the other second rod 32 rotates counterclockwise, it is necessary to arrange the two rod assemblies 30 on opposite sides of the key cap 10, for example, in fig. 1, one of the rod assemblies 30 is located on the left side of the key cap 10, the other of the rod assemblies 30 is located on the right side of the key cap 10, taking the key cap 10 as a circle as an example, the two rod assemblies 30 are preferably located on two sides of a straight line in which the diameter direction of the key cap 10 is located, for example, in fig. 1, the two second rods 32 are located on two sides of a central vertical line of the key cap 10. Here, the two second rods 32 rotate in opposite directions, which means that the two second rods 32 rotate in substantially opposite directions when viewed from the same direction, for example, from bottom to top in fig. 3, when the key cap 10 is pressed (the pressing direction is into the vertical paper), the left second rod 32 rotates clockwise, and the right second rod 32 rotates counterclockwise, so that from the same direction, the second rods 32 corresponding to the two rod assemblies 30 need to meet the condition that they cannot be perpendicular to each other.

With the key structure configured as above, the second rods 32 of the two rod assemblies 30 rotate around the central axes of the corresponding first rods 31 along with the movement of the key cap 10, and the rotation directions of the two second rods 32 are opposite, so that when a user presses any point on the key cap 10, the consistency of the pressing strokes of all parts of the key cap 10 (i.e. the moving distance of all parts on the key cap 10 along the preset direction Z) can be greatly improved, i.e. the pressing strokes of all parts on the key cap 10 are substantially consistent, and the stability of the key cap 10 in the moving process can be improved; in the rotating process, the displacements of the two second rods 32 along the direction perpendicular to the preset direction Z are offset, specifically, the two second rods 32 move in opposite directions respectively in fig. 1, one moves leftwards and the other moves rightwards, and the displacements of the two second rods are approximately offset, which is beneficial to reducing the shaking amount of the keycap 10. In addition, compared with the prior art, the key cap 10 does not need to be provided with a guide post or a guide rib, the structure is simpler, the design is easier to realize, and compared with the guide post or the guide rib in the prior art, the key cap 10 has better movement stability, and the operation hand feeling of a user is improved. In addition, in the composite scheme of the rod assembly 30, the key cap 10 and the housing 20 in the embodiment, the requirement on the processing precision of the key structure is not high, and the key structure can be realized by adopting a conventional hand plate processing process, compared with the key of large medical equipment in the prior art which needs mold opening and injection molding, the consumed cycle is three months, the embodiment can adopt the hand plate processing, the cycle from processing to molding is usually one month, and the design budget and the time cost can be reduced.

In this embodiment, the second rod 32 is closer to the key cap 10 than the first rod 31, i.e. in fig. 1 and 3, the second rod 32 is closer to the central vertical line of the key cap 10; of course, in other embodiments, the first rod 31 may be closer to the key cap 10 than the second rod 32, for example, as shown in fig. 1 or 3, that is, the first rod 31 is closer to the central vertical line of the key cap 10.

It should be noted that, in the present embodiment, a specific arrangement form of the preset direction Z is not limited, and is determined according to an application scenario and an arrangement manner of the electronic control device. For example, the preset direction Z may be parallel to the gravity direction, and the keycap 10 generally moves vertically downward (downward along the gravity direction) when being pressed, and certainly in some specific application scenarios, the keycap 10 moves vertically upward when being pressed; the preset direction Z is arranged at an angle (e.g. 15 °, 30 ° or 45 °) to the gravity direction, and the keycap 10 usually moves obliquely downward when pressed, and certainly in some specific application scenarios, the keycap 10 moves obliquely upward when pressed; the preset direction Z is perpendicular to the gravity direction, i.e. the preset direction Z is parallel to the horizontal direction, and the keycap 10 moves in the horizontal left or right direction when being pressed.

Preferably, the present embodiment satisfies at least one of the following: (1) the first bar 31 and the second bar 32 are parallel to each other; (2) the first rods 31 corresponding to the two rod assemblies 30 in the same group of guiding structures are parallel to each other, and the plane of the first rods 31 corresponding to the two rod assemblies 30 is perpendicular to the preset direction (Z), that is, the normal direction of the plane shared by the two first rods 31 after being parallel is parallel to the preset direction Z. Any of the above solutions can make the key structure easier to design and the rotation of the second lever 32 easier to achieve. Preferably, the present embodiment satisfies both of the above schemes. In other embodiments, the first rod 31 and the second rod 32 of the same rod assembly 30 may also be arranged obliquely, and the angle of inclination between them may be, for example, 15 °, 30 ° or 45 °. Moreover, in other embodiments, it is also possible to arrange the first rod 31 of one of the rod assemblies 30 and the first rod 31 of the other rod assembly 30 in a coplanar or inclined manner, the projections of which on the same plane along the preset direction Z are substantially in the shape of a "figure eight".

The rod assembly 30 of the present embodiment may be made of a metal material such as copper, iron, steel, etc., for example, and the present invention is not limited thereto. Further, the bar assembly 30 comprises a third bar 33 and a fourth bar 34, the first bar 31, the third bar 33, the second bar 32 and the fourth bar 34 being connected in sequence such that the bar assembly 30 forms a similar frame, i.e. the bar assembly 30 corresponds to a closed frame. It will be appreciated that with respect to the rotation of the second rod 32 about the central axis of the first rod 31, including but not limited to the following forms:

(1) the first rod 31 is movably connected to the housing 20, the second rod 32 is movably connected to the key cap 10, the second rod 32 drives the first rod 31 to rotate around the central axis of the second rod 31 when rotating, specifically, the first rod 31 and the second rod 32 are fixedly connected through the third rod 33 and the fourth rod 34, and the second rod 32 rotates around the central axis of the first rod 31 to drive the first rod 31 to rotate;

(2) the first rod 31 is fixed on the housing 20, the second rod 32 is movably connected to the key cap 10, the third rod 33 is at least hinged to the first rod 31 (or hinged to the first rod 31 and the second rod 32 at the same time), the fourth rod 34 is at least hinged to the first rod 31 (or hinged to the first rod 31 and the second rod 32 at the same time), and when the second rod 32 rotates around the central axis of the first rod 31, the first rod 31 will not rotate around its central axis.

Preferably, referring to fig. 4, fig. 4 is a schematic view along B-B in fig. 3, where it should be noted that B-B is a sectional view taken perpendicular to the paper surface, i.e., fig. 4 is a sectional view taken perpendicular to B-B in fig. 3, and the second rod 32 includes a first sub-section 321 and a second sub-section 322 which are segmented along an axial direction thereof. This arrangement, in addition to saving material from the rod assembly 30, making the overall structure simpler, also facilitates easy mounting of the rod assembly 30 to the housing 20 via the first and

second sub-segments

321, 322. Further, the first subsection 321 is connected to the first rod 31 via the third rod 33, and the second subsection 322 is connected to the first rod 31 via the fourth rod 34. The rod assembly 30 is generally similar to a frame having an opening (or notch) formed by the segmentation of the second rod 32.

Further, in order to prevent the rod assembly 30 from moving along the axial direction of the first rod 31, the key structure further includes a stopper 40, and the stopper 40 is located on the housing 20 and is used for limiting the movement of the rod assembly 30 along the axial direction of the first rod 31. In a specific embodiment, the limiting member 40 limits the movement of the lever assembly 30 by abutting against the third and

fourth levers

33, 34. In order to make the rotation of the limiting member 40 and the third rod 33 and the fourth rod 34 against the second rod 32 of the rear rod assembly 30 relatively easy, the present embodiment preferably configures that the third rod 33 and the fourth rod 34 are both vertically connected with the first rod 31, and the rod assembly 30 is similar to a rectangular frame as a whole.

In an exemplary embodiment, please refer to fig. 2, fig. 2 is a cross-sectional view taken along a direction a-a in fig. 1, where it should be noted that the direction a-a is a cross-sectional view taken along a direction a-a perpendicular to the paper, that is, fig. 2 is a cross-sectional view taken along a direction a-a perpendicular to the paper in fig. 1, the housing 20 includes a first assembling hole 210, specifically, the inner wall of the housing 20 may have a protruding extending portion 21, the extending portion 21 has a first assembling hole 210, and the first assembling hole 210 is used for receiving the first rod 31. It should be noted that, for the sake of easier practical processing, the first assembling hole 210 may be segmented into at least two, for example, the first assembling hole 210 corresponding to the left first rod 31 in fig. 1 is segmented into two. Further, with reference to fig. 2, the key structure includes a fixing block 212, the extending portion 21 defines an assembling groove 211, the fixing block 212 is matched with the assembling groove 211 to form a first assembling hole 210, and specifically, the fixing block is used for being engaged with an opening of the assembling groove 211 to form the first assembling hole 210. During assembly, the first rod 31 enters from the opening of the assembly groove 211 and is accommodated in the assembly groove 211, and then the opening of the assembly groove 211 is closed by the fixing block 212, so that the first rod 31 is prevented from being withdrawn from the assembly groove 211. The first rod 31 is conveniently installed by the matching mode of the fixing block 212 and the assembling groove 211, and the assembling groove 211 can facilitate the direct processing and forming of a milling cutter during actual processing.

In other embodiments, if the second rod 32 is configured to rotate around the central axis of the first rod 31, and the first rod 31 does not rotate, the first rod 31 can be fixedly connected to the housing 20, for example, it can be fixed in the first assembly hole 210 by snapping, i.e. the first rod 31 is clamped in the first assembly hole 210, or fixed on the inner wall of the housing 20 by screws, snapping, welding, or the like.

In an exemplary embodiment, please refer to fig. 4 in combination with fig. 2, fig. 4 is a sectional view taken along a direction B-B in fig. 3, where it should be noted that the direction B-B is a sectional view taken perpendicular to a plane of paper, that is, fig. 4 is a sectional view taken along the direction B-B perpendicular to the plane of paper in fig. 3, the key cap 10 is provided with a second assembling hole 11, and the second rod 32 is movably received in the second assembling hole 11 along a radial direction of the second assembling hole 11. Specifically, the second rod 32 needs to be movably disposed in the second assembly hole 11 along a direction perpendicular to the preset direction Z, and more specifically, referring to fig. 1, the second rod 32 needs to be movable in the second assembly hole 11 along the transverse direction in fig. 1, which can prevent the second rod 32 from being jammed and the key cap 10 from being unable to be pressed because the key cap 10 has a component of the transverse movement of the second rod 32 when being pressed (specifically, the two second rods 32 move toward each other in fig. 1). Specifically, the second fitting hole 11 may be configured as a long hole, and the long axis direction of the long hole corresponds to the moving direction of the second rod 32 (the long axis direction is parallel to the transverse direction in fig. 1), which is substantially the connecting direction between the two rod assemblies.

The present embodiment is not limited to the specific form of the second fitting hole 11. For example, the second assembly hole 11 may be a whole, the second assembly hole 11 is a through hole, and the second rod 32 penetrates into the second assembly hole 11. The second assembling holes 11 can be segmented into at least two (for example, two in fig. 4), at least two segmented second assembling holes 11 are through holes, and the second rod 32 sequentially passes through each segment of the second assembling holes 11; or, the second assembly holes 11 formed in sections are blind holes or through holes, and taking fig. 4 as an example, the second assembly holes 11 located at the upper side may be through holes or blind holes, and the second assembly holes 11 located at the lower side may be through holes or blind holes. The second rod 32 is also segmented into two segments (corresponding to the middle of the second rod 32 is cut off), namely, the first segment 321 and the second segment 322 described above, the first segment 321 is received in the upper second assembly hole 11, and the second segment 322 is received in the lower second assembly hole 11. Therefore, after the second rod 32 is segmented into the first subsection 321 and the second subsection 322, the first subsection 321 and the second subsection are respectively installed in the second assembly hole 11 from the openings at the two ends of the second assembly hole 11, which is beneficial for an operator to conveniently install the second rod 32 on the key cap 10.

Further, referring to fig. 2, the second assembling hole 11 corresponding to the second rod 32 of one of the rod assemblies 30 is communicated with the second assembling hole 11 corresponding to the second rod 32 of the other one of the rod assemblies 30 (that is, one second assembling hole 11 is equivalent to accommodate two second rods 32), so that the second assembling holes 11 can be conveniently machined, the machining time is reduced, and the machining difficulty is simplified. Of course, in other embodiments, the second assembly holes 11 corresponding to the two second rods 32 may not be connected and are independently arranged.

With continuing reference to fig. 1, 3 and 2, in the present embodiment, the second rod 32 is selected to be closer to the key cap 10 than the first rod 31, i.e., fig. 1 and 3, the second rod 32 is closer to the vertical line of center of the key cap 10, wherein, with respect to the scheme in which the second fitting holes 11 corresponding to the respective two second rods 32 communicate (here, the communicating scheme is still indicated by the nomenclature of the second fitting holes 11), the inventors found that, when the key cap 10 is not pressed after the two second rods 32 are located in the same second fitting hole 11, it is necessary to make the two second rods 32 respectively abut against two side walls of the second assembling hole 11, so that the shaking amount existing when the key cap 10 is pressed can be further reduced, it is also necessary to have a certain distance between the two second rods 32, so that the two second rods 32 can move towards each other, and the keycap 10 is not locked and can not be pressed.

Further, the inventors have found that the spacing between the two second bars 32 needs to satisfy the formula shown below after a plurality of experiments in a test scheme including: the first rod 31 and the second rod 32 are parallel to each other, the two rod assemblies 30 are symmetrically disposed about a straight line (specifically, a central vertical line of the key cap 10 in fig. 3) where a diameter of the key cap 10 (the key cap 10 is circular), and when the key cap 10 is not pressed, the two second rods 32 respectively abut against two side walls of the second assembly hole 11. The formula is as follows:

Δx＝R-Rcosα

wherein the content of the first and second substances,

Δ x is the spacing between the two second bars 32;

r represents a turning radius of the second lever 32, i.e., a distance between the second lever 32 and the first lever 31;

α represents the maximum rotation angle of the second lever 32, corresponding to the angle by which the second lever 32 is rotated at the maximum depression stroke of the key cap 10.

In addition, considering the key structure of the present embodiment of the hand board process, the distance between the two second levers 32 is Δ x + x₁Wherein x is₁The value is between 0.4mm and 1mm, including 0.4mm and 1 mm.

In one embodiment, the key structure includes at least two sets of the guide structures, and the positions of the at least two sets of the guide structures along the preset direction Z are matched with each other.

Taking the example that the key structure includes two sets of guiding structures, after the two sets of guiding structures are connected to the key cap 10, the connecting line direction between the two rod assemblies 30 of one set of guiding structures needs to be different from the (arrangement) connecting line direction between the two rod assemblies 30 of the other set of guiding structures. For example, the two rod assemblies 30 of this guiding structure shown in fig. 3 are arranged along the transverse direction, the two rod assemblies 30 of the other guiding structure may be arranged along the vertical direction, or may be arranged at an angle (for example, 45 ° or 60 °) with the transverse direction, and preferably, the connecting line direction between the two rod assemblies 30 of one guiding structure and the connecting line direction between the two rod assemblies 30 of the other guiding structure are perpendicular to each other. With this arrangement, when the edge of the key top 10 is pressed, the uniformity of the pressing stroke of the key top 10 can be further improved. When the key structure includes a plurality of sets (more than two sets) of guide structures, the mutual arrangement direction between at least a part of the guide structures may satisfy the above example, and will not be described herein. It should be noted that, at least two (or more) sets of the guiding structures are adapted to each other along the predetermined direction Z, and specifically, the positions of the sets of the guiding structures along the predetermined direction Z are different, and when the predetermined direction Z is parallel to the gravity direction, that is, the heights of the sets of the guiding structures are different, so that mutual interference between the guiding structures can be avoided.

Actually, the key structure may further include a main key cap (not shown), the plurality of key caps 10 are connected to the main key cap and located on the same side of the main key cap, the key caps 10 are arranged in an array on the same side of the main key cap, when the main key cap is pressed, the key caps 10 are correspondingly pressed, and each key cap 10 is correspondingly connected to one or at least two sets of guiding structures. In this manner, the plurality of sets of guide structures may act on the same key top (the key top is understood to be a structure actually used for pressing by an operator), thereby increasing the pressing stability of the key structure.

Further, referring to fig. 5, fig. 5 is a cross-sectional view of a key structure according to an embodiment of the present invention along a predetermined direction, generally, the key structure includes an elastic bottom key 50, and the elastic bottom key 50 is located between the housing 20 and the key cap 10. The elastic bottom key 50 is configured to expand or contract with the movement of the key cap 10 along the preset direction Z, specifically, the elastic bottom key 50 will generate elastic deformation when the user presses the key cap 10, and the elastic bottom key 50 gradually restores to jack up and reset the key cap 10 when the user does not press the key cap 10. In this embodiment, the elastic bottom key 50 can be made of silicone, i.e. a silicone key of the prior art. In addition, the key structure further comprises key carbon particles 60 (arranged at the end of the elastic bottom key 50), a first circuit board 70 (flexible circuit board), a hand feeling increasing block 80, a metal dome 90 and a second circuit board 100 which are sequentially arranged along the preset direction Z. After the key cap 10 is pressed, the carbon particles 60 of the key act on the first circuit board 70, and the first circuit board 70 acts on the snap dome 90, so that the snap dome 90 contacts with the corresponding circuit contact on the second circuit board 100, and the second circuit board 100 forms a corresponding circuit loop, thereby completing the corresponding command action. The feel enhancing piece 80 has a certain softness that improves the user's pressing experience.

Based on the above key structure, the present invention further provides an electronic control device, which includes the above key structure. The electronic control device is not specifically limited in this embodiment, and the application scenario of the key structure is illustrated, for example, the key structure is applied to a workstation (computer) of a medical imaging device, the key structure is applied to a central control panel of an automobile, and the key structure is applied to a peripheral keyboard of a digital device.

It is understood that the electronic control device has the advantages of the key structure, and the working principle and other structural components of the electronic control device are not explained, and those skilled in the art can understand the prior art.

The above description is only for the purpose of describing the preferred embodiments of the present invention, and is not intended to limit the scope of the present invention, and any variations and modifications made by those skilled in the art according to the above disclosure are within the scope of the present invention.

Claims

1. A key structure applied to an electronic control device, comprising:

a housing (20);

a key cap (10) movably arranged along a preset direction (Z) and arranged with the housing (20) along the preset direction (Z);

at least one set of guiding structures, each set of guiding structures comprising two rod assemblies (30), said rod assemblies (30) comprising a first rod (31) and a second rod (32) which are coplanar and non-perpendicular, the axial direction of said first rod (31) being perpendicular to said preset direction (Z);

the first lever (31) is mounted on the housing (20);

the second rod (32) is connected with the key cap (10) and is configured to rotate around the central axis of the first rod (31) along with the movement of the key cap (10) along the preset direction (Z);

wherein the direction of rotation of the second lever (32) of the two lever assemblies (30) is opposite.

2. Key construction according to claim 1, characterised in that said first lever (31) is parallel to said second lever (32).

3. A key construction according to claim 1, characterized in that said housing (20) comprises a first fitting hole (210), said first fitting hole (210) being intended to receive said first rod (31).

4. The key structure of claim 3, characterized in that the key structure comprises a fixing block (212), the housing (20) is provided with a mounting groove (211), and the fixing block (212) and the mounting groove (211) are matched to form the first mounting hole (210).

5. A key construction according to claim 1, wherein said key cap (10) comprises a second assembly aperture (11), said second rod (32) being movably received in said second assembly aperture (11) in a radial direction of said second assembly aperture (11).

6. The key construction according to claim 1, characterized in that it comprises a stop (40), said stop (40) being located on said housing (20) and being adapted to limit the movement of said lever assembly (30) in the axial direction of said first lever (31).

7. A key construction according to claim 1, characterized in that said second rod (32) comprises a first subsection (321) and a second subsection (322) which are sectionally formed axially along itself.

8. A key construction according to claim 7, characterized in that said rod assembly (30) comprises a third rod (33) and a fourth rod (34), said first subsection (321) being connected to said first rod (31) via said third rod (33), and said second subsection (322) being connected to said first rod (31) via said fourth rod (34).

9. A key construction according to claim 1, characterized in that said lever assembly (30) is a frame structure.

10. An electronic control device, comprising the key structure according to any one of claims 1 to 9, wherein the key structure further comprises an elastic bottom key (50), carbon key particles (60), a first circuit board (70), a metal dome (90) and a second circuit board (100), the key cap (10), the elastic bottom key (50), the housing (20), the first circuit board (70) and the second circuit board (100) are sequentially arranged along the preset direction (Z), the carbon key particles (60) are disposed at an end of the elastic bottom key (50) facing the first circuit board (70), and the metal dome (90) is disposed on the second circuit board (100).