Jig for testing steering wheel

Abstract

A jig for testing a steering wheel is disclosed. The test jig of the present invention comprises: a first link and a second link, each comprising a link hand extending longitudinally and a link arm extending from the link hand, which are spaced apart in the transverse direction and face each other; a holder body comprising a first holder body end coupled to the link arm of the first link and a second holder body end coupled to the link arm of the second link; and a pad comprising a first pad end coupled to the link hand of the first link and a second pad end coupled to the link hand of the second link, and extending from the first pad end to the second pad end, wherein the link arm of the first link is elastically coupled to the first holder body end and the link arm of the second link is elastically coupled to the second holder body end.

Description

Technology Field

[0001] The present invention relates to a jig for testing a steering wheel. Background Technology

[0002] A steering wheel installed in a vehicle may include a HOD sensor. The HOD sensor can be utilized in a driving assistance system by detecting a person's hand gripping the steering wheel. To test the performance of the HOD sensor, an actual human hand may grip the steering wheel. In this case, it may be difficult to ensure the reliability of the test because the condition of the human hand may vary depending on the test environment. Prior art literature

[0003] US 2024 / 0083488 A1 The problem to be solved

[0004] The present invention aims to solve the aforementioned problems and other problems.

[0005] Another purpose of the present invention is to provide a steering wheel testing jig that mimics a human hand. means of solving the problem

[0006] According to one aspect of the present invention for achieving the above or other purposes, a test jig may be provided, comprising: a first link and a second link, each having a link hand extending longitudinally and a link arm extending from the link hand, which are spaced apart in the transverse direction and face each other; a holder body including a first holder body end coupled to the link arm of the first link and a second holder body end coupled to the link arm of the second link; and a pad including a first pad end coupled to the link hand of the first link and a second pad end coupled to the link hand of the second link, the pad extending from the first pad end and continuing to the second pad end, wherein the link arm of the first link is elastically coupled to the first holder body end and the link arm of the second link is elastically coupled to the second holder body end.

[0007] One end of the link arm of the first link is pivotally coupled to the end of the first holder body and the other end of the link arm of the first link is coupled to the link hand of the first link, and one end of the link arm of the second link is pivotally coupled to the end of the second holder body and the other end of the link arm of the second link can be connected to the link hand of the second link.

[0008] The above test jig may further include a holder including the holder body; a first elastic member connecting the first link and the holder; and a second elastic member connecting the second link and the holder.

[0009] Each of the first link and the second link may further include a link wing protruding from the link arm, and the first elastic member may connect the link wing of the first link and the holder, and the second elastic member may connect the link wing of the second link and the holder.

[0010] The holder includes a first holder wing and a second holder wing protruding in different directions from the holder body, the first elastic member connects the link wing of the first link and the first holder wing, and the second elastic member connects the link wing of the second link and the second holder wing.

[0011] The holder body end includes at least one of the first holder body end and the second holder body end, and a wrinkle may be formed on one surface of at least one of the link arm and the holder body.

[0012] The holder body end includes at least one of the first holder body end and the second holder body end, and a groove may be formed on one surface of at least one of the link arm and the holder body.

[0013] The pad may include a pad contact surface forming one side of the pad; and a pad non-contact surface forming the other side of the pad. The dielectric constant of the pad contact surface may be 41 to 51.

[0014] The pad may include a silicon layer and a skin layer that are laminated and have different dielectric constants. The dielectric constant of the skin layer may be 41 to 51.

[0015] The above link hand comprises a palm including a palm body extended in a longitudinal direction; and a plurality of fingers each including a finger body arranged longitudinally along the palm body and facing the inner surface of the palm body, and the pad may be coupled to the finger body.

[0016] The palm may include a plurality of palm guide holes formed as holes in the palm body that penetrate the palm body in a transverse direction and are sequentially arranged in a longitudinal direction; and a plurality of palm connecting holes formed as holes in the palm body that penetrate the palm body in a transverse direction and are sequentially arranged in a longitudinal direction.

[0017] The finger comprises a finger guide rod protruding laterally from the finger body; and a finger connecting rod protruding laterally from the finger body and having threads formed on at least a portion of its outer surface, wherein the finger guide rod of the plurality of fingers is inserted into and coupled to one of the corresponding palm guide holes, and the finger connecting rod of the plurality of fingers can be inserted into and coupled to one of the corresponding palm connecting holes.

[0018] The distance between the inner surface of the palm body and the finger body can be adjusted.

[0019] The above link hand includes a plurality of finger couplers that are inserted into and coupled to one of the corresponding palm connecting holes, and the plurality of fingers can be coupled to one of the corresponding finger couplers.

[0020] Each of the plurality of finger couplers comprises: a finger coupler body facing the outer surface of the palm body; a finger coupler rod received in the palm connecting hole and connected to the finger body; and a finger coupler flange facing the inner surface of the palm body and connected to the finger coupler rod, and each of the plurality of fingers may comprise: a finger guide rod protruding laterally from the finger body and inserted into one of the corresponding palm guide holes; and a finger connecting rod protruding laterally from the finger body, having threads formed on at least a portion of its outer surface, and inserted into one of the corresponding finger couplers. Effects of the invention

[0021] According to at least one of the embodiments of the present invention, a steering wheel test jig simulating a human hand may be provided.

[0022] Further scopes of the applicability of the present invention will become apparent from the following detailed description. However, since various changes and modifications within the spirit and scope of the present invention are clearly understood by those skilled in the art, specific embodiments, such as the detailed description and preferred embodiments of the present invention, should be understood as being given merely as examples. Brief explanation of the drawing

[0023] Figure 1 is a diagram showing a driver holding the steering wheel for a HOD (Hand On Detection) sensor test. FIG. 2 is a perspective view showing a test jig according to one embodiment of the present invention. Figure 3 is an exploded perspective view of the test jig shown in Figure 2. Figure 4 is a drawing showing a part of the pad illustrated in Figure 3. Figure 5 is a drawing showing the pad illustrated in Figure 3. Figure 6 is a drawing showing the state in which the pad and coupler are disassembled among the test jig shown in Figure 2. Figure 7 is a drawing showing the test jig shown in Figure 2 being used on the steering wheel shown in Figure 1. Figure 8 is a drawing showing the steering wheel and test jig illustrated in Figure 7 viewed from a different direction. Figure 9 is a drawing showing a palm with palm guide holes and palm connecting holes formed therein. FIG. 10 is a drawing showing a finger according to one embodiment of the present invention. FIG. 11 is a drawing showing a finger coupler according to one embodiment of the present invention. Figure 12 is a drawing showing the finger coupler shown in Figure 11 coupled to the palm shown in Figure 9. FIG. 13 is a drawing showing a cross-section of the link hand shown in FIG. 12 cut along A1-A2. FIG. 14 is a drawing showing the finger shown in FIG. 10 coupled to the finger coupler shown in FIG. 13. Specific details for implementing the invention

[0024] Hereinafter, embodiments disclosed in this specification will be described in detail with reference to the attached drawings. Identical or similar components regardless of drawing symbols will be assigned the same reference number, and redundant descriptions thereof will be omitted. The suffixes "module" and "part" used for components in the following description are assigned or used interchangeably solely for the ease of drafting the specification and do not inherently possess distinct meanings or roles. Furthermore, in describing embodiments disclosed in this specification, if it is determined that a detailed description of related prior art could obscure the essence of the embodiments disclosed in this specification, such detailed description will be omitted. Additionally, the attached drawings are intended only to facilitate understanding of the embodiments disclosed in this specification; the technical concept disclosed in this specification is not limited by the attached drawings, and it should be understood that they include all modifications, equivalents, and substitutions that fall within the spirit and technical scope of the present invention.

[0025] Terms including ordinal numbers, such as first, second, etc., may be used to describe various components, but said components are not limited by said terms. These terms are used solely for the purpose of distinguishing one component from another.

[0026] When it is stated that one component is "connected" or "connected" to another component, it should be understood that while it may be directly connected or connected to that other component, there may also be other components in between. On the other hand, when it is stated that one component is "directly connected" or "directly connected" to another component, it should be understood that there are no other components in between.

[0027] Singular expressions include plural expressions unless the context clearly indicates otherwise.

[0028] In this application, terms such as “comprising” or “having” are intended to specify the existence of the features, numbers, steps, actions, components, parts, or combinations thereof described in the specification, and should be understood as not precluding the existence or addition of one or more other features, numbers, steps, actions, components, parts, or combinations thereof.

[0029] In the drawings, the size of components may be exaggerated or reduced for convenience of explanation. For example, the size and thickness of each component shown in the drawings are depicted arbitrarily for convenience of explanation, so the present invention is not necessarily limited to what is illustrated.

[0030] Where an embodiment can be implemented differently, a specific process sequence may be performed differently from the order described. For example, two processes described consecutively may be performed substantially simultaneously or proceed in the reverse order of the description.

[0031] In the following embodiments, when it is stated that a membrane, region, component, etc. is connected, it includes not only cases where the membrane, region, or component is directly connected, but also cases where other membranes, regions, or components are interposed between them to form an indirect connection. For example, when it is stated in this specification that a membrane, region, component, etc. is electrically connected, it includes not only cases where the membrane, region, or component, etc. are directly electrically connected, but also cases where other membranes, regions, or components are interposed between them to form an indirect electrical connection.

[0032] In this specification, an XYZ coordinate system may be used. For example, the XYZ coordinate system may include an X-axis, a Y-axis, and a Z-axis. The XYZ coordinate system may be a Cartesian coordinate system.

[0033] For example, the X-axis can be parallel to the front-back direction. For example, the direction in which the positive X-axis points can be forward. For example, the direction in which the negative X-axis points can be rearward.

[0034] For example, the Z-axis can be parallel to the vertical direction. For example, the direction in which the positive Z-axis points can be upward. For example, the direction in which the negative Z-axis points can be downward.

[0035] For example, the Y-axis can be parallel to the left and right directions. For example, the X-axis and Y-axis can form a horizontal plane. For example, the direction in which the positive Y-axis points can be the left direction. For example, the direction in which the negative Y-axis points can be the right direction.

[0036] Figure 1 is a diagram showing a driver holding the steering wheel for a HOD (Hand On Detection) sensor test.

[0037] Referring to FIG. 1, a steering wheel (STW) installed in a vehicle (VHC) may include a HOD sensor (not shown). The HOD sensor (not shown) can detect a human hand (HMH) gripping the steering wheel (STW). The HOD sensor (not shown) may be used in a driving assistance system of the vehicle (VHC).

[0038] When a human hand (HMH) grips the steering wheel (STW) to test the operational performance of the HOD sensor (not shown), it may be difficult to ensure the test reliability of the HOD sensor (not shown) because the size and shape of the human hand (HMH) vary from person to person and the condition of the human hand (HMH) may vary depending on the test environment.

[0039] FIG. 2 is a perspective view showing a test jig according to one embodiment of the present invention.

[0040] Referring to FIGS. 1 and 2, the test jig (10) can grip the steering wheel (STW) in place of a human hand (HMH). For example, the test jig (10) may include a pad (500). The pad (500) can simulate the area of ​​the human hand (HMH) that contacts the steering wheel (STW). In this context, the test jig (10) may be referred to as a “steering wheel test jig.”

[0041] The test jig (10) may include a knob (100). A user of the test jig (10) may grasp the knob (100). The knob (100) may be formed in a shape suitable for use in which the user can grasp it.

[0042] For example, the knob (100) may be extended in one direction. For example, the knob (100) may be extended from the bottom upward to the top. For example, the longitudinal direction of the knob (100) may be vertical.

[0043] Figure 3 is an exploded perspective view of the test jig shown in Figure 2.

[0044] Referring to FIGS. 2 and 3, the test jig (10) may include a holder (200). The holder (200) may include a holder body (210). The holder body (210) may be connected to or coupled to a knob (100).

[0045] For example, the holder body (210) can form a shape extending from the top of the knob (100). For example, the holder body (210) can extend from one end and connect to the other end.

[0046] For example, the first holder body end (210A) may be one end of the holder body (210). For example, the second holder body end (210B) may be the other end of the holder body (210). The holder body end (210A, 210B) may include or mean at least one of the first holder body end (210A) and the second holder body end (210B).

[0047] The holder body (210) may form a concave or convex shape. For example, the upper face of the holder body (210) may be concave as one side of the holder body (210). For example, the lower face of the holder body (210) may be convex as the other side of the holder body (210). The lower face of the holder body (210) may be connected to the knob (100).

[0048] The holder (200) may include a holder wing (220). The holder wing (220) may be connected to or coupled to at least one of the holder body (210) and the knob (100). The holder wing (220) may be multiple.

[0049] For example, the holder (200) may include a first holder wing (220A) and a second holder wing (220B). The holder wing (220) may include or mean at least one of the first holder wing (220A) and the second holder wing (220B).

[0050] For example, the first holder wing (220A) may be located below the first holder body end (210A). For example, the second holder wing (220B) may be located below the second holder body end (210B).

[0051] The test jig (10) may include a link (300). The link (300) may be multiple. For example, the test jig (10) may include a first link (300A) and a second link (300B). The link (300) may include or refer to at least one of the first link (300A) and the second link (300B).

[0052] The link (300) may include a link arm (310). The link arm (310) may extend from the bottom upward to form a shape connected to the top. The link (300) may be connected to a holder body (210).

[0053] For example, the link arm (310) may be pivotally coupled or hingedly coupled to the holder body (210). For example, the lower portion of the link arm (310) may be pivotally coupled or hingedly coupled to the holder body (210).

[0054] For example, the link arm (310) of the first link (300A) may be pivotally or hinge-connected to the first holder body end (210A). For example, the lower end of the link arm (310) of the first link (300A) and the first holder body end (210A) may be connected by a fastener (FST).

[0055] For example, the link arm (310) of the second link (300B) may be pivotally or hinge-connected to the second holder body end (210B). The lower end of the link arm (310) of the second link (300B) and the second holder body end (210B) may be connected by a fastener (FST).

[0056] For example, the link (300) may rotate or pivot at the holder body (210). For example, the first link (300A) may rotate or pivot at the end (210A) of the first holder body. For example, the upper part of the link arm (310) of the first link (300A) may approach the second link (300B) or move away from the second link (300B).

[0057] For example, the second link (300B) can rotate or pivot at the second holder body end (210B). For example, the upper part of the link arm (310) of the second link (300B) can approach the first link (300A) or move away from the first link (300A).

[0058] The link (300) may include a link wing (320). The link wing (320) may be connected to or coupled to the link arm (310). For example, the link wing (320) may extend from the link arm (310). For example, the link wing (320) may protrude from the lower part of the link arm (310).

[0059] For example, the link wing (320) of the first link (300A) may protrude from the lower part of the link arm (310) of the first link (300A) in a direction away from the second link (300B).

[0060] For example, the link wing (320) of the second link (300B) may protrude from the lower part of the link arm (310) of the second link (300B) in a direction away from the first link (300A).

[0061] For example, the link wing (320) of the first link (300A) may protrude from the outer surface of the link arm (310) of the first link (300A). For example, the outer surface of the link arm (310) of the first link (300A) may be located on the opposite side of the inner surface of the link arm (310) of the first link (300A).

[0062] For example, the link wing (320) of the second link (300B) may protrude from the outer surface of the link arm (310) of the second link (300B). For example, the outer surface of the link arm (310) of the second link (300B) may be located on the opposite side of the inner surface of the link arm (310) of the second link (300B).

[0063] The inner surface of the link arm (310) of the first link (300A) may face the inner surface of the link arm (310) of the second link (300B).

[0064] The link (300) may include a link hand (330). The link hand (330) may include a palm (331). The palm (331) may include a palm body (3311).

[0065] The palm body (3311) may be connected to or coupled to the link arm (310). For example, the palm body (3311) may extend or protrude from the link arm (310). For example, the palm body (3311) may extend or protrude in the forward and backward direction from the upper part of the link arm (310).

[0066] For example, the longitudinal direction of the palm body (3311) may be the front-back direction. For example, the palm body (3311) of the first link (300A) and the palm body (3311) of the second link (300B) may be arranged side by side with each other. The longitudinal direction of the palm body (3311) may be referred to as the “longitudinal direction.”

[0067] The palm (331) may include a palm fastening groove (3314). The palm fastening groove (3314) may form a recessed shape on the upper surface of the palm body (3311). A well shape protruding upward from the upper circumference of the palm fastening groove (3314) may be formed.

[0068] The link (300) and the holder (200) can be elastically connected. For example, the link wing (320) and the holder wing (220) can be connected by an elastic member (SPR). For example, one end of the elastic member (SPR) can be connected to the link wing (320), and the other end of the elastic member (SPR) can be connected to the holder wing (220).

[0069] For example, the link wing (320) of the first link (300A) and the first holder body end (210A) can be joined through an elastic member (SPR). For example, the link wing (320) of the second link (300B) and the second holder body end (210B) can be joined through an elastic member (SPR).

[0070] The elastic member (SPR) connecting the first link (300A) and the holder (200) may be referred to as the “first elastic member.” The elastic member (SPR) connecting the second link (300B) and the holder (200) may be referred to as the “second elastic member.”

[0071] For example, the elastic member (SPR) may be formed from a material comprising at least one of a metal and a polymer. For example, the elastic member (SPR) may include at least one of a tension spring, a torsion spring, a coil spring, a leaf spring, and a volute spring.

[0072] For example, the elastic member (SPR) may be an extension spring connecting the link wing (320) and the holder body ends (210A, 210B). For example, as an extension spring, both ends of the elastic member (SPR) may be connected to the link wing (320) and the holder body ends (210A, 210B), respectively.

[0073] As another example, the elastic member (SPR) may be a torsion spring. For example, as a torsion spring, both ends of the elastic member (SPR) may be connected to the link arm (310) and the holder body ends (210A, 210B), respectively.

[0074] The elastic member (SPR) can provide elasticity to the link (300) with respect to the holder body (210). For example, if at least one of the position and orientation of the link (300) with respect to the holder body (210) changes, the shape of the elastic member (SPR) can be deformed.

[0075] When the shape of the elastic member (SPR) is deformed, an elastic force may be formed in the link (300) relative to the holder body (210). The direction of the elastic force formed in the link (300) may be the direction of the restoring force, which is the direction in which the position or orientation of the link (300) relative to the holder body (210) is restored.

[0076] For example, if the palm (331) of the first link (300A) moves or tilts toward the second link (300B), the elastic member (SPR) connected to the first link (300A) can provide an elastic force to the first link (300A) in a direction that causes the palm (331) of the first link (300A) to move away from the second link (300B).

[0077] For example, if the palm (331) of the second link (300B) moves or tilts toward the first link (300A), the elastic member (SPR) connected to the second link (300B) can provide an elastic force to the second link (300B) in a direction that causes the palm (331) of the second link (300B) to move away from the first link (300A).

[0078] As another example, the link arm (310) may extend from the holder body end (210A, 210B). For example, the link arm (310) may be formed of an elastic material. For example, the link arm (310) may be formed of a material comprising at least one of silicone and polyurethane.

[0079] For example, at least one of the lower part of the link arm (310) and the end part of the holder body (210A, 210B) may have a corrugated structure. For example, the link arm (310) may have a structure that forms elasticity. For example, the lower part of the link arm (310) may be corrugated.

[0080] For example, at least one groove may be formed on at least one surface of the lower part of the link arm (310) and the end part of the holder body (210A, 210B). For example, at least one groove may be formed on at least one surface of the lower part of the link arm (310).

[0081] The test jig (10) may include a pad (500). The pad (500) may include a pad body (510). The pad body (510) may form two sides. For example, one side of the pad body (510) may face at least one of the holder body (210) and the knob (100).

[0082] The pad body (510) may extend from one end and continue to the other end. For example, the longitudinal direction of the pad body (510) may be parallel to the direction from the link hand (330) of the first link (300A) to the link hand (330) of the second link (300B). The longitudinal direction of the pad body (510) may be referred to as the “width direction” or “transverse direction.”

[0083] For example, the pad body (510) may extend laterally from the first pad end (520A) to the second pad end (520B). The pad (500) may be coupled to the link (300). For example, the pad (500) may be detachably coupled to the link (300). The pad end (520) may include or mean at least one of the first pad end (520A) and the second pad end (520B).

[0084] For example, the first pad end (520A) may be coupled to the palm (331) of the first link (300A). For example, the test jig (10) may include a first coupler (400A). The first coupler (400A) may be positioned over the first pad end (520A) and fastened to the palm (331) of the first link (300A) by means of a fastener (FST).

[0085] For example, the second pad end (520B) may be coupled to the palm (331) of the second link (300B). For example, the test jig (10) may include a second coupler (400B). The second coupler (400B) may be positioned over the second pad end (520B) and fastened to the palm (331) of the second link (300B) by means of a fastener (FST).

[0086] The coupler (400) may include or mean at least one of a first coupler (400A) and a second coupler (400B). The coupler (400) may include a coupler body (410). The coupler body (410) may extend in a longitudinal direction. For example, the longitudinal direction of the coupler body (410) may be the longitudinal direction.

[0087] The coupler (400) may include a coupler hole (420). The coupler hole (420) may be a hole formed in the coupler body (410). The coupler hole (420) may penetrate the coupler body (410) vertically.

[0088] The coupler hole (420) may be positioned above a hole or opening formed in the pad end (520). The opening formed in the pad end (520) may be fitted into a well-shaped projection protruding upward from the upper surface of the palm body (3311). The fastener (FST) may sequentially penetrate the coupler (400) and the pad (500) and be fastened to the palm fastening groove (3314).

[0089] FIG. 4 is a drawing showing a part of the pad illustrated in FIG. 3. FIG. 5 is a drawing showing the pad illustrated in FIG. 3.

[0090] Referring to FIGS. 4 and FIGS. 5, the pad (500) shown in FIGS. 4 may be referred to as a “pad segment.” The pad (500) shown in FIGS. 5 may be formed by arranging a plurality of pad segments (500) shown in FIGS. 4.

[0091] The pad segment (500) illustrated in FIG. 4 may include two openings or holes. For example, one opening may be formed in each of the first pad end (520A) and the second pad end (520B) of the pad segment (500) illustrated in FIG. 4.

[0092] The pad (500) illustrated in FIG. 5 may include three or more openings. For example, a plurality of openings may be formed in each of the first pad end (520A) and the second pad end (520B) of the pad (500) illustrated in FIG. 5.

[0093] The pad (500) can form two sides. For example, the pad contact surface (500C) can form the upper face of the pad (500). For example, the pad non-contact surface (500N) can form the lower face. The pad contact surface (500C) and the pad non-contact surface (500N) can be positioned opposite each other.

[0094] The non-contact surface (500N) of the pad may face at least one of the holder body (210, see FIG. 3) and the knob (100, see FIG. 3). The contact surface (500C) of the pad may come into contact with the steering wheel (STW, see FIG. 1) when using the test jig (10, see FIG. 1).

[0095] The pad (500) may be formed from a material including silicon. For example, the pad (500) may form a plurality of layers. For example, the pad (500) may include a “silicon layer” and a “skin layer”.

[0096] For example, a silicone layer (not shown) can form the framework of the pad (500). For example, a silicone layer (not shown) can form the non-contact surface (500N) of the pad. For example, a silicone layer (not shown) can provide elasticity to the pad (500).

[0097] For example, a skin layer (not shown) may be laminated onto a silicone layer (not shown). For example, the skin layer (not shown) may form a pad contact surface (500C). For example, the relative permittivity of the skin layer (not shown) may be 41 to 51.

[0098] For example, the dielectric constant of the pad contact surface (500C) may be 41 to 51. Thus, the pad (500) can effectively mimic a human hand (HMH, see FIG. 1). For example, the capacitance of the pad contact surface (500C) may be similar to the average capacitance of a human hand (HMH, see FIG. 1).

[0099] Figure 6 is a drawing showing the state in which the pad and coupler are disassembled among the test jig shown in Figure 2.

[0100] Referring to FIG. 6, the fastener (FST) attached to the link (300) can be detached from the link (300). When the fastener (FST) attached to the link (300) is released from the link (300), the coupler (400) and the pad (500) can be detached from the link (300).

[0101] The pad (500) can be replaced with a new pad (500). The replaced pad (500) can be connected to the link (300) via the coupler (400) and the fastener (FST), as previously described.

[0102] FIG. 7 is a drawing showing the test jig shown in FIG. 2 being used on the steering wheel shown in FIG. 1. FIG. 8 is a drawing showing the steering wheel and the test jig shown in FIG. 7 viewed from a different direction. In FIG. 8, for convenience of explanation, part of the steering wheel (STW) may be omitted and the steering wheel (STW) may be shown as translucent.

[0103] Referring to FIGS. 1 to 8, the test jig (10) can come into contact with the steering wheel (STW). For example, the pad contact surface (500C) can come into contact with the steering wheel (STW).

[0104] The test jig (10) can be moved so that the pad contact surface (500C) contacts the steering wheel (STW), with the pad contact surface (500C) facing the steering wheel (STW).

[0105] A HOD sensor (not shown) connected to the steering wheel (STW) can measure the capacitance of the steering wheel (STW). The capacitance of the steering wheel (STW) can be referred to as the “first capacitance.”

[0106] When the pad contact surface (500C) comes into contact with the steering wheel (STW), the HOD sensor (not shown) can measure the combined capacitance of the steering wheel (STW) and the pad (500). The combined capacitance of the steering wheel (STW) and the pad (500) can be referred to as the “second capacitance.”

[0107] The HOD sensor (not shown) can measure the first capacitance and the second capacitance, and extract the difference between the first capacitance and the second capacitance to determine whether the test jig (10) is in contact with the steering wheel (STW).

[0108] As another example, a HOD sensor (not shown) measures a first capacitance and a second capacitance, and a control unit (not shown) extracts the difference between the first capacitance and the second capacitance to determine whether the test jig (10) is in contact with the steering wheel (STW).

[0109] For example, if there is substantially no difference between the first capacitance and the second capacitance measured by the HOD sensor (not shown), the performance of the HOD sensor (not shown) may be evaluated as relatively low.

[0110] The pad (500) can wrap around and come into contact with the steering wheel (STW). During the process of the pad (500) wrapping around the steering wheel (STW), the distance between the first pad end (520A) and the second pad end (520B) may be reduced.

[0111] In the process of decreasing the distance between the first pad end (520A) and the second pad end (520B), the pad (500) can pull the first link (300A) and the second link (300B). For example, the link hand (330) of the first link (300A) and the link hand (330) of the second link (300B) can approach each other.

[0112] For example, when the link hand (330) of the first link (300A) and the link hand (330) of the second link (300B) approach each other, the link (300) can pivot or rotate with respect to the holder (200).

[0113] For example, when the first link (300A) pivots or rotates with respect to the first holder body end (210A), an elastic force may be formed in the elastic member (SPR) connecting the first holder wing (220A) and the first link (300A).

[0114] For example, when the second link (300B) pivots or rotates with respect to the second holder body end (210B), an elastic force may be formed in the elastic member (SPR) connecting the second holder wing (220B) and the second link (300B).

[0115] After the performance evaluation of the HOD sensor (not shown) is completed, the test jig (10) can be separated from the steering wheel (STW).

[0116] When the test jig (10) is separated from the steering wheel (STW), the elastic member (SPR) connecting the link (300) and the holder wing (220) can provide a restoring force to the link (300). As a result, the link hand (330) of the first link (300A) and the link hand (330) of the second link (300B) can move away from each other, and the pad (500) can be spread out.

[0117] Figure 9 is a drawing showing a palm with palm guide holes and palm connecting holes formed therein.

[0118] Referring to FIG. 9, the palm (331) may include a palm body (3311). The palm body (3311) may form a shape that extends in the longitudinal direction of the palm body (3311). The longitudinal direction of the palm body (3311) may be the longitudinal direction.

[0119] The palm (331) may include a palm guide hole (3312). The palm guide hole (3312) may be a hole formed in the palm body (3311). The palm guide hole (3312) may penetrate the palm body (3311) in a transverse direction.

[0120] The palm (331) may include a palm connecting hole (3313). The palm connecting hole (3313) may be a hole formed in the palm body (3311). The palm connecting hole (3313) may penetrate the palm body (3311) in a transverse direction.

[0121] The palm connecting hole (3313) and the palm guide hole (3312) may be spaced apart from each other. For example, the palm connecting hole (3313) and the palm guide hole (3312) may be arranged in an up-and-down direction.

[0122] The palm connecting holes (3313) and palm guide holes (3312) may each be provided in multiple numbers. For example, the palm (331) may include multiple palm connecting holes (3313) and multiple palm guide holes (3312). The number of multiple palm connecting holes (3313) may be equal to the number of multiple palm guide holes (3312).

[0123] For example, a plurality of palm connecting holes (3313) may be spaced apart in the longitudinal direction and arranged sequentially. For example, a plurality of palm guide holes (3312) may be spaced apart in the longitudinal direction and arranged sequentially.

[0124] FIG. 10 is a drawing showing a finger according to one embodiment of the present invention.

[0125] Referring to FIG. 10, the link hand (330, see FIG. 3) may include a finger (332). The finger (332) may include a finger body (3321). The finger body (3321) may form the shape of a block.

[0126] The finger (332) may include a finger guide rod (3322). The finger guide rod (3322) may extend or protrude from the finger body (3321). For example, the finger guide rod (3322) may protrude laterally from the outer surface of the finger body (3321). The finger guide rod (3322) may form the shape of a pillar, for example.

[0127] The finger (332) may include a finger connecting rod (3323). The finger connecting rod (3323) may protrude laterally from the outer surface of the finger body (3321). The finger connecting rod (3323) may form, for example, the shape of a pillar.

[0128] The arrangement relationship between the finger connecting rod (3323) and the finger guide rod (3322) may be substantially the same as the arrangement relationship between the palm connecting hole (3313, see FIG. 9) and the palm guide hole (3312, see FIG. 9).

[0129] For example, the finger connecting rod (3323) and the finger guide rod (3322) may be spaced apart from each other. For example, the finger connecting rod (3323) and the finger guide rod (3322) may be arranged in an up-and-down direction.

[0130] A thread may be formed on at least a portion of the outer surface of the finger connecting rod (3323). For example, the finger connecting rod (3323) may form the shape of a lead screw.

[0131] For example, a thread may be formed on the outer surface of the distal end portion of the finger connecting rod (3323). The distal end portion of the finger connecting rod (3323) may refer to the end located relatively far from the finger body (3321) among the two ends of the finger connecting rod (3323).

[0132] The finger (332) may include a finger fastening groove (3324). The finger fastening groove (3324) may be a groove formed in the finger body (3321). For example, the finger fastening groove (3324) may form a recessed shape on the upper surface of the finger body (3321).

[0133] For example, the shape of the finger fastening groove (3324) may be similar to the shape of the palm fastening groove (3314, see FIG. 3). For example, a well shape protruding upward from the upper circumference of the finger fastening groove (3324) may be formed.

[0134] FIG. 11 is a drawing showing a finger coupler according to one embodiment of the present invention.

[0135] Referring to FIG. 11, the link hand (330, see FIG. 3) may include a finger coupler (333). The finger coupler (333) may include a finger coupler body (3331). The finger coupler body (3331) may form the shape of a nut or a female screw.

[0136] For example, the finger coupler body (3331) may form a hollow portion. For example, the inner surface of the finger coupler body (3331) may face the hollow portion of the finger coupler body (3331). Screw threads may be formed on the inner surface of the finger coupler body (3331).

[0137] The finger coupler body (3331) may, for example, form a shape extended in the longitudinal direction of the finger coupler body (3331). For example, the longitudinal direction of the finger coupler body (3331) may be a transverse direction.

[0138] For example, the longitudinal direction of the hollow formed in the finger coupler body (3331) may be transverse. For example, the hollow formed in the finger coupler body (3331) may be open at both ends.

[0139] The finger coupler (333) may include a finger coupler rod (3332). The finger coupler rod (3332) may be connected to the finger coupler body (3331). For example, the finger coupler rod (3332) may extend laterally from the finger coupler body (3331).

[0140] The outer surface of the finger coupler rod (3332) can form the shape of a pillar. For example, the longitudinal direction of the finger coupler rod (3332) may be transverse. For example, the longitudinal direction of the hollow portion formed in the finger coupler rod (3332) may be transverse.

[0141] The finger coupler (333) may include a finger coupler flange (3333). The finger coupler flange (3333) may extend laterally from the finger coupler rod (3332). For example, the finger coupler flange (3333), the finger coupler rod (3332), and the finger coupler body (3331) may be connected laterally in sequence.

[0142] For example, one end of the finger coupler rod (3332) may be connected to the finger coupler body (3331), and the other end of the finger coupler rod (3332) may be connected to the finger coupler flange (3333).

[0143] For example, the outer surface of the finger coupler rod (3332) and the outer surface of the finger coupler body (3331) may form a step. For example, the outer surface of the finger coupler body (3331) may be formed by extending radially from the outer surface of one end of the finger coupler rod (3332).

[0144] For example, the finger coupler flange (3333) may extend radially from the other end of the finger coupler rod (3332). For example, the finger coupler flange (3333) may form the shape of a disc. For example, the finger coupler flange (3333) may be the shape of a disc with an opening formed therein.

[0145] FIG. 12 is a drawing showing the finger coupler shown in FIG. 11 coupled to the palm shown in FIG. 9. FIG. 13 is a drawing showing a cross-section of the link hand shown in FIG. 12 cut along A1-A2.

[0146] Referring to FIGS. 9 through 13, the finger couplers (333) may be provided in plurality. For example, the link hand (330) may include a plurality of finger couplers (333). The plurality of finger couplers (333) may be spaced apart in the longitudinal direction, for example.

[0147] The finger coupler (333) can be coupled to the palm (331). For example, the finger coupler (333) can be inserted into and coupled to the palm connecting hole (3313). For example, the finger coupler rod (3332) of the finger coupler (333) can be received in the palm connecting hole (3313).

[0148] A plurality of finger couplers (333) can be coupled to the palm (331). For example, the finger coupler rod (3332) of the plurality of finger couplers (333) can be received in one of the corresponding palm connecting holes (3313).

[0149] The process of the finger coupler (333) being coupled to the palm (331) can be observed. For example, when the finger coupler flange (3333) is not formed on the finger coupler (333), the finger coupler rod (3332) of the finger coupler (333) can be inserted into the palm connecting hole (3313).

[0150] When the finger coupler rod (3332) of the finger coupler (333) is inserted into the palm connecting hole (3313), the outer surface of the palm body (3311) may face the finger body (3321). In this context, the outer end of the finger coupler rod (3332) may be connected to or coupled with the finger body (3321).

[0151] For example, after the finger coupler rod (3332) is inserted into the palm connecting hole (3313), the finger coupler flange (3333) can be coupled to the finger coupler rod (3332). When the finger coupler flange (3333) is coupled to the finger coupler rod (3332), the inner surface of the palm body (3311) may face the finger coupler flange (3333). In this context, the inner end of the finger coupler rod (3332) may be connected to or coupled to the finger coupler flange (3333).

[0152] In another example, when the finger coupler rod (3332) is inserted into the palm connecting hole (3313), the inner end of the finger coupler rod (3332) may protrude from the inner surface of the palm body (3311).

[0153] For example, an inner end protruding from the inner surface of the palm body (3311) may be segmented in a circumferential or azimuth direction. The segmented inner end may be bent radially to form a finger coupler flange (3333).

[0154] FIG. 14 is a drawing showing the finger shown in FIG. 10 coupled to the finger coupler shown in FIG. 13.

[0155] Referring to FIGS. 1 through 14, the fingers (332) may be provided in plurality. For example, the plurality of fingers (332) may be arranged longitudinally. For example, the plurality of fingers (332) may be arranged along the palm body (3311).

[0156] The fingers (332) can be coupled to the finger coupler (333). For example, the finger connecting rod (3323) can be inserted into the finger coupler (333). For example, the finger connecting rods (3323) of a plurality of fingers (332) can be inserted into one of the corresponding finger couplers (333).

[0157] The finger (332) can be coupled to the palm (331). For example, the finger guide rod (3322) can be inserted into the palm guide hole (3313). For example, the finger guide rods (3322) of a plurality of fingers (332) can be inserted into one of the corresponding palm guide holes (3313).

[0158] With the finger (332) coupled to the palm (331), the inner surface of the palm body (3311) may face the finger body (3321). The distance between the palm body (3311) and the finger body (3321) can be adjusted. For example, the finger body (3321) may move laterally relative to the palm body (3311).

[0159] When the finger connecting rod (3323) is inserted into the finger coupler (333), the finger connecting rod (3323) and the finger coupler body (3331) can be screw-coupled. When the finger coupler body (3331) rotates, the rotational force of the finger coupler body (3331) can be transmitted to the finger connecting rod (3323). The rotational force transmitted to the finger connecting rod (3323) can be converted to the lateral direction.

[0160] For example, when the finger coupler body (3331) rotates in a first rotation direction, the distance between the finger body (3321) and the palm body (3311) may increase. For example, when the finger coupler body (3331) rotates in a second rotation direction, the distance between the finger body (3321) and the palm body (3311) may decrease. The first rotation direction and the second rotation direction may be opposite directions to each other.

[0161] In this way, the shape of the link hand (330) can be modified. For example, the shape of the steering wheel (STW) may differ depending on the type of steering wheel (STW). For example, the shape of the pad (500) covering the steering wheel (STW) can be optimized according to the shape of the steering wheel (STW).

[0162] When the shape of the pad (500) is deformed, the shape of the link hand (330) needs to be deformed to match the shape of the deformed pad (500). Thus, the optimal test jig (10) can be applied to the test of the steering wheel (STW) to match the steering wheel (STW).

[0163] Some or other embodiments of the present invention described above are not exclusive or distinct from one another. Some or other embodiments of the present invention described above may be used in combination or combined, with their respective components or functions.

[0164] It is obvious to those skilled in the art that the present invention may be embodied in other specific forms without departing from the spirit and essential features of the invention. The foregoing detailed description should not be interpreted restrictively in any respect and should be considered exemplary. The scope of the invention shall be determined by a reasonable interpretation of the appended claims, and all modifications within the equivalent scope of the invention are included within the scope of the invention. Explanation of the symbols

[0165] 10: Test jig 100: Knob 200: Holder 210: Holder body 220: Holder Wing 300: Link 310: Link Arm 320: Link Wing 330: Link Hand 400: Coupler 410: Coupler body 420: Coupler hole 500: Pad 510: Pad body 520: Pad end

Claims

Claim 1 A test jig comprising: a first link and a second link, each comprising a link hand extending longitudinally and a link arm extending from the link hand, which are spaced apart in the transverse direction and face each other; a holder body comprising a first holder body end coupled to the link arm of the first link and a second holder body end coupled to the link arm of the second link; and a pad comprising a first pad end coupled to the link hand of the first link and a second pad end coupled to the link hand of the second link, the pad extending from the first pad end and connecting to the second pad end, wherein the link arm of the first link is elastically coupled to the first holder body end and the link arm of the second link is elastically coupled to the second holder body end. Claim 2 A test jig according to claim 1, wherein one end of the link arm of the first link is pivotally coupled to the end of the first holder body and the other end of the link arm of the first link is coupled to the link hand of the first link, and one end of the link arm of the second link is pivotally coupled to the end of the second holder body and the other end of the link arm of the second link is connected to the link hand of the second link. Claim 3 A test jig according to claim 1, further comprising: a holder including the holder body; a first elastic member connecting the first link and the holder; and a second elastic member connecting the second link and the holder. Claim 4 A test jig according to paragraph 3, wherein each of the first link and the second link further includes a link wing protruding from the link arm, the first elastic member connects the link wing of the first link and the holder, and the second elastic member connects the link wing of the second link and the holder. Claim 5 A test jig according to claim 4, wherein the holder comprises a first holder wing and a second holder wing protruding in different directions from the holder body, the first elastic member connects the link wing of the first link and the first holder wing, and the second elastic member connects the link wing of the second link and the second holder wing. Claim 6 A test jig according to claim 1, wherein the holder body end comprises at least one of the first holder body end and the second holder body end, and a corrugation is formed on one surface of at least one of the link arm and the holder body. Claim 7 A test jig according to claim 1, wherein the holder body end comprises at least one of the first holder body end and the second holder body end, and a groove is formed on one surface of at least one of the link arm and the holder body. Claim 8 A test jig according to claim 1, wherein the pad comprises a pad contact surface forming one side of the pad; and a pad non-contact surface forming the other side of the pad. Claim 9 In claim 1, the pad comprises a test jig including a silicon layer and a skin layer that are laminated and have different dielectric constants. Claim 10 A test jig according to claim 1, wherein the link hand comprises a palm including a palm body extended in a longitudinal direction; and a plurality of fingers each comprising a finger body arranged longitudinally along the palm body and facing an inner surface of the palm body, and the pad is coupled to the finger body. Claim 11 A test jig according to claim 10, wherein the palm comprises: a plurality of palm guide holes formed as holes in the palm body that penetrate the palm body in a transverse direction and are sequentially arranged in a longitudinal direction; and a plurality of palm connecting holes formed as holes in the palm body that penetrate the palm body in a transverse direction and are sequentially arranged in a longitudinal direction. Claim 12 A test jig according to claim 11, wherein the finger comprises: a finger guide rod protruding laterally from the finger body; and a finger connecting rod protruding laterally from the finger body and having threads formed on at least a portion of its outer surface, wherein the finger guide rod of the plurality of fingers is inserted into and coupled to one corresponding palm guide hole, and the finger connecting rod of the plurality of fingers is inserted into and coupled to one corresponding palm connecting hole. Claim 13 A test jig according to claim 12, wherein the distance between the inner surface of the palm body and the finger body is adjustable. Claim 14 In claim 11, the link hand comprises a plurality of finger couplers that are inserted into and coupled to one of the plurality of palm connecting holes, and the plurality of fingers are coupled to one of the plurality of finger couplers, forming a test jig. Claim 15 A test jig according to claim 14, wherein each of the plurality of finger couplers comprises: a finger coupler body facing the outer surface of the palm body; a finger coupler rod received in the palm connecting hole and connected to the finger body; and a finger coupler flange facing the inner surface of the palm body and connected to the finger coupler rod, and each of the plurality of fingers comprises: a finger guide rod protruding laterally from the finger body and inserted into one of the corresponding palm guide holes; and a finger connecting rod protruding laterally from the finger body, having threads formed on at least a portion of its outer surface, and inserted into one of the corresponding finger couplers.

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