Resonator

Abstract

To provide a resonator which is easily attached to a wheel and hardly detached from the wheel.SOLUTION: The resonator 2 has a configuration in which one zigzag-shaped tubular part 22 is provided on a rectangular substrate 21, and a plurality of portions in the central axis direction of first to third straight line parts 221 to 223 adjacent to each other in the tubular part 22 are respectively connected by ribs 27,28. According to this configuration, the rigidity and flexibility of the resonator 2 can be set in a well-balanced manner, for example, the rigidity of the resonator 2 can be appropriately set so that the resonator 2 is less likely to be elastically deformed as compared with the case where the first to third straight portions 221 to 223 are not connected, and the flexibility of the resonator 2 can be appropriately set so that the resonator 2 is more likely to be elastically deformed as compared with the case where the entire regions of the first to third straight portions 221 to 223 in the central axis direction are connected.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present invention relates to a resonator. [Background technology]

[0002] For example, paragraph 0017 of Patent Document 1 states that "Resonator 1 has a shape in which one end is folded back toward the other end, and has two parts 11 and 12 extending parallel to each other, and part 13 connecting them. The length L1 of part 11 is longer than the length L2 of part 12. The length L3 of part 13 is shorter than the length L2 of part 12." [Prior art documents] [Patent documents]

[0003] [Patent Document 1] International Publication No. WO2020 / 157907 Summary of the Invention [Problem to be solved by the invention]

[0004] In Patent Document 1, if the resonator 1 is U-shaped, there is a concern that the rigidity may decrease.

[0005] In view of the above circumstances, an object of the present invention is to provide a resonator that is easy to attach to a wheel and difficult to remove from the wheel. [Means for solving the problem]

[0006] The present invention is a resonator having a configuration in which a single tubular section of a zigzag shape is provided on a rectangular substrate, and is characterized in that a plurality of straight sections arranged side by side in parallel in the tubular section are connected at multiple points along the central axis by ribs.

[0007] With this configuration, it is possible to appropriately set the rigidity of the resonator so that it is less susceptible to elastic deformation, compared to, for example, when the multiple straight sections are not connected to each other; and it is also possible to appropriately set the flexibility of the resonator so that it is easier to elastically deform, compared to, for example, when the entire area in the central axis direction of each of the multiple straight sections is connected to each other.

[0008] In this way, it is possible to set the rigidity and flexibility of the resonator 2 in a well-balanced manner, so that, for example, when the resonator is attached to a vehicle wheel, the resonator is easy to attach because it is easy to cause moderate elastic deformation, but when subjected to the rotational centrifugal force of the wheel, the resonator is difficult to deform moderately, making it difficult to come off the wheel.

[0009] In this way, the resonator according to the present invention can be easily attached to a wheel and yet be difficult to remove from the wheel.

[0010] In the above resonator, the central axis of each of the straight portions can be parallel to the opposing first and second sides of the four sides of the substrate, the opening on one end side in the central axis direction of the tubular portion can be positioned on one of the third and fourth sides of the substrate that are perpendicular to the first side, and the opening on the other end side in the central axis direction of the tubular portion can be positioned on the other of the third and fourth sides.

[0011] Furthermore, in the above-mentioned resonator, there may be three straight sections, the central axis of each of which is parallel to a first side and a second side that face each other among the four sides of the substrate, one end side of each straight section in the direction of its central axis being disposed on one of a third side and a fourth side of the substrate that are perpendicular to the first side, and the other end side of each straight section in the direction of its central axis being disposed on the other of the third side and the fourth side, one end side of the first straight section located on the left end and the other end side of the third straight section located on the right end are open, the other end side of the first straight section and the other end side of the second straight section located in the middle are connected by a first U-shaped section, and one end side of the second straight section and one end side of the third straight section located on the right end are connected by a second U-shaped section.

[0012] According to this configuration, the ceiling surfaces of the inner holes of the first straight section and the third straight section are inclined surfaces with an upward slope from one end side to the other end side, and the ceiling surface of the inner hole of the second straight section is inclined surfaces with an upward slope from the other end side to the one end side.

[0013] As a result, if the resonator is to be attached to, for example, a vehicle wheel, even if liquid such as tire repair agent or water flows into the opening at one end of the first straight section, the centrifugal force generated by the rotation of the wheel will cause the liquid to flow into the first straight section along the ceiling surface of the inner hole of the first straight section toward the second straight section, and then along the ceiling surface of the inner hole of the second straight section toward the third straight section, and finally be discharged from the opening at the other end of the third straight section.

[0014] In this way, it is possible to prevent the liquid from remaining in the multiple straight sections, thereby preventing a deterioration in the effect of the resonator in improving NV performance (the effect of reducing air column resonance noise in the air chamber between the wheel and tire).

[0015] Furthermore, in the above-mentioned resonator, the cross-sectional height of each inner hole of the first straight portion and the third straight portion can be set to gradually increase from one end side to the other end side, and the cross-sectional height of the inner hole of the second straight portion can be set to gradually increase from the other end side to the one end side.

[0016] Furthermore, in the above resonator, the cross-sectional height of each inner hole of the first straight portion and the third straight portion can be set to gradually increase from the other end side toward one end side, and the cross-sectional height of the inner hole of the second straight portion can be set to gradually increase from the one end side toward the other end side.

[0017] According to this configuration, the ceiling surfaces of the inner holes of the first straight section and the third straight section are inclined surfaces with an upward slope from the other end side to the one end side, and the ceiling surface of the inner hole of the second straight section is inclined surfaces with an upward slope from the one end side to the other end side.

[0018] As a result, if the resonator is to be attached to, for example, a vehicle wheel, even if liquid such as tire repair agent or water flows in through the opening on the other end of the third straight section, the centrifugal force generated by the rotation of the wheel will cause the liquid to flow into the first straight section along the ceiling surface of the inner hole of the first straight section toward the second straight section, and then along the ceiling surface of the inner hole of the second straight section toward the first straight section, and finally be discharged from the opening on the other end of the first straight section.

[0019] In this way, it is possible to prevent the liquid from remaining in the multiple straight sections, thereby preventing a deterioration in the effect of the resonator in improving NV performance (the effect of reducing air column resonance noise in the air chamber between the wheel and tire). [Effects of the Invention]

[0020] According to the present invention, it is possible to provide a resonator that is easy to attach to a wheel and that is difficult to remove from the wheel. [Brief explanation of the drawings]

[0021] [Figure 1] 1 is a perspective view showing an embodiment of a resonator according to the present invention in a state before the resonator is attached to a wheel. FIG. [Figure 2] FIG. 2 is a perspective view showing a state in which the resonator is attached to the wheel. [Figure 3] FIG. 3 is a side view of the wheel in FIG. 2. [Figure 4] FIG. 1 is a view of the resonator from the surface. [Figure 5] This is a view of the resonator from the back. [Figure 6] 3A is a cross-sectional view taken along line (A)-(A) in FIG. 3, (b) is a cross-sectional view taken along line (B)-(B) in FIG. 3, (c) is a cross-sectional view taken along line (C)-(C) in FIG. 3, and (d) is a cross-sectional view taken along line (D)-(D) in FIG. 3. DETAILED DESCRIPTION OF THE INVENTION

[0022] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the best mode for carrying out the present invention will be described in detail with reference to the accompanying drawings.

[0023] An embodiment of the present invention is shown in Figures 1 to 6. These figures disclose a resonator 2 that is mounted on a wheel 1 for a vehicle.

[0024] The wheel 1 includes a rim 11 on which a tire (not shown) is fitted, and a disc 12 for connection to a hub (not shown) of a vehicle. The wheel 1 is made of metal such as an aluminum alloy or a magnesium alloy.

[0025] At two locations on the outer peripheral surface of the well portion 13 of the rim 11, spaced apart by a predetermined distance in the width direction, vertical walls 14, 15 are provided so as to rise radially outward and continue in the circumferential direction.

[0026] Both the vertical walls 14 and 15 are shaped like rails. Here, the vertical wall 14 located on the disc 12 side of the wheel 1 will be referred to as the "outer vertical wall 14," and the vertical wall 15 located on the inner surface of the wheel 1 will be referred to as the "inner vertical wall 15."

[0027] As shown in FIG. 6, grooves 141 and 151 are provided on the inner surfaces of the outer vertical wall 14 and the inner vertical wall 15 of the wheel 1, respectively.

[0028] By providing these grooves 141, 151, the upper end of the inner surface of the outer vertical wall 14 and the upper end of the inner surface of the inner vertical wall 15 have protruding portions 142, 152 that protrude toward the other side.

[0029] In this embodiment, in the outer vertical wall 14 and the inner vertical wall 15, in the multiple predetermined angle regions where the multiple resonators 2 are attached, multiple notches 143, 153 are provided at equal intervals in the circumferential direction.

[0030] The resonator 2 is used to reduce the air column resonance noise in the air chamber formed between the wheel 1 and the tire (not shown), and is attached at multiple locations circumferentially equally spaced on the outer surface of the well portion 13 of the rim 11 of the wheel 1.

[0031] The resonator 2 is mounted at multiple locations at equal intervals around the circumference of the wheel 1, such as two locations 180 degrees apart around the circumference of the wheel 1, or three locations every 120 degrees around the circumference of the wheel 1, or four locations every 90 degrees around the circumference of the wheel 1.

[0032] The resonator 2 has a structure in which one tubular portion 22 is provided on a substrate 21. The material of the resonator 2 is, for example, a synthetic resin, but the material is not particularly limited.

[0033] Substrate 21 is formed in a rectangular shape in a plan view and a C-shaped curved shape in a side view. As shown in Fig. 4, notches 23 and 24 are provided at equal intervals on a long side (called a first side) located on the left side of substrate 21 in a plurality of positions in the longitudinal direction, and on a long side (called a second side) located on the right side of substrate 21 in a plurality of positions in the longitudinal direction.

[0034] Projecting pieces 25 and 26 each having a rectangular shape in a plan view are present between the notches 23 and 24. As will be described later, the projecting pieces 25 and 26 are engaged with the grooves 141 and 151 of the wheel 1.

[0035] As shown in FIG. 6, the left and right protruding pieces 25, 26 are shaped to be inclined obliquely upward in the direction of their protrusion.

[0036] The interval between the left and right cutouts 23, 24 is set to be larger than the interval between the cutouts 143 in the outer vertical wall 14 of the wheel 1 and the interval between the cutouts 153 in the inner vertical wall 15.

[0037] The tubular portion 22 has a zigzag shape. Specifically, the tubular portion 22 has a shape such that a single tubular portion 22 is made into U-turns at two locations spaced apart along the central axis direction.

[0038] More specifically, the tubular portion 22 has a first straight portion 221 (left end in Figures 3 and 4), a second straight portion 222 (center in Figures 3 and 4), a third straight portion 223 (right end in Figures 3 and 4), a first U-shaped portion 224 (lower side in Figures 3 and 4), a second U-shaped portion 225 (upper side in Figures 3 and 4), etc.

[0039] The first to third linear portions 221 to 223 are arranged so that their central axes are parallel to the first left side and the second right side of the substrate 21, and are arranged side by side in parallel in the short direction of the substrate 21.

[0040] One end (upper end in Figures 3 and 4) of each of the first to third straight sections 221 to 223 in the central axis direction is arranged on the upper short side (referred to as the third side) located at one longitudinal end (upper end in Figures 3 and 4) of the substrate 21, and the other end (lower end in Figures 3 and 4) of each of the first to third straight sections 221 to 223 in the central axis direction is arranged on the lower short side (referred to as the fourth side) located at the other longitudinal end (lower end in Figures 3 and 4) of the substrate 21.

[0041] Both ends in the central axis direction are open of the tubular portion 22. Specifically, one end in the central axis direction of the first straight portion (upper end in FIGS. 3 and 4) is open on the third side of the substrate 21, and the other end in the central axis direction of the third straight portion 223 (lower end in FIGS. 3 and 4) is open on the fourth side of the substrate 21.

[0042] If the rotation direction of the wheel 1 is, for example, the direction of the arrow in Figure 3, the opening on one end side of the first straight section 221 is upstream of the rotation direction of the wheel 1, and the opening on the other end side of the third straight section 223 is downstream of the rotation direction of the wheel 1.

[0043] The other end side of the first straight portion 221 in the central axis direction and the other end side of the second straight portion 222 in the central axis direction are connected by a first U-shaped portion 224, and one end side of the second straight portion 222 and one end side of the third straight portion 223 are connected by a second U-shaped portion 225.

[0044] As shown in Figures 4 and 6, the first straight portion 221 and the second straight portion 222 are connected by ribs 27 at multiple locations equally spaced along their central axes, and the second straight portion 222 and the third straight portion 223 are connected by ribs 28 at multiple locations equally spaced along their central axes.

[0045] Furthermore, the cross-sectional height of each inner hole of the first straight portion 221 and the third straight portion 223 is set to gradually increase from one end side (the third side of the substrate 21) in the direction of their central axis to the other end side (the fourth side of the substrate 21), and the cross-sectional height of the inner hole of the second straight portion 222 is set to gradually increase from the other end side (the fourth side of the substrate 21) in the direction of their central axis to one end side (the third side of the substrate 21).

[0046] That is, in the inner holes of the first straight portion 221 and the third straight portion 223, taking the cross-sectional heights shown in FIG. 6(a) as X1 and Y1, the cross-sectional heights shown in FIG. 6(b) as X2 and Y2, the cross-sectional heights shown in FIG. 6(c) as X3 and Y3, and the cross-sectional height shown in FIG. 6(d) as Y4 in the inner hole of the third straight portion 223, the relationship of X1 < X2 < X3 and Y1 < Y2 < Y3 < Y4 is set.

[0047] Also, in the inner hole of the second straight portion 222, taking the cross-sectional height shown in FIG. 6(a) as Z1, the cross-sectional height shown in FIG. 6(b) as Z2, and the cross-sectional height shown in FIG. 6(c) as Z3, the relationship of Z1 > Z2 > Z3 is set.

[0048] As a result, the ceiling surfaces of the inner holes of the first straight portion 221 and the third straight portion 223 become inclined surfaces with an upward gradient from one end side to the other end side in the direction of their central axes, and the ceiling surface of the inner hole of the second straight portion 222 becomes an inclined surface with an upward gradient from the other end side to the one end side in the direction of its central axis. The angle of this gradient is arbitrary.

[0049] Next, an example of the procedure and operation for attaching the resonator 2 to the wheel 1 will be described.

[0050] The resonator 2 is fitted between the outer vertical wall 14 and the inner vertical wall 15 of the wheel 1. However, when the plurality of left and right projecting pieces 25 and 26 of the resonator 2 are elastically deformed one by one and inserted into the groove portions 141 and 151 of the outer vertical wall 14 and the inner vertical wall 15, the left and right projecting pieces 25 and 26 are elastically restored and the tips in the projecting directions of the projecting pieces 25 and 26 are locked to the inner corners near the upper ends of the vertical walls 14 and 15, that is, the overhanging portions 142 and 152, in the groove portions 141 and 151 of the outer vertical wall 14 and the inner vertical wall 15.

[0051] Furthermore, since the first to third straight sections 221 to 223 of the resonator 2 are connected at multiple points in the central axis direction by ribs 27, 28, it is possible to appropriately set the rigidity of the resonator 2 so that the resonator 2 is less susceptible to elastic deformation compared to when the first to third straight sections 221 to 223 are not connected, and it is also possible to appropriately set the flexibility of the resonator 2 so that the resonator 2 is more susceptible to elastic deformation compared to when, for example, the entire area in the central axis direction of the first to third straight sections 221 to 223 are connected.

[0052] In this way, it is possible to set the rigidity and flexibility of the resonator 2 in a well-balanced manner, so that when attaching the resonator 2 to the wheel 1, the resonator 2 can be easily elastically deformed to an appropriate degree, making it easier to attach, but on the other hand, when subjected to the rotational centrifugal force of the wheel 1, the resonator 2 is difficult to elastically deform to an appropriate degree, making it difficult for the multiple protrusions 25, 26 on the left and right sides of the resonator 2 to come off the groove portions 141, 151 of the wheel 1.

[0053] As described above, the resonator 2 according to the embodiment to which the present invention is applied can be easily attached to the wheel 1 and made less likely to come off from the wheel 1.

[0054] Generally, when the diameter of the wheel 1 is increased, the weight of the wheel 1 increases, which in turn increases the unsprung weight of the vehicle and deteriorates ride comfort. Therefore, when the weight of the wheel 1 is reduced to improve ride comfort, the rigidity of the wheel 1 decreases, and the NV performance deteriorates. Therefore, it has been considered to attach a resonator 2 to the wheel 1 in order to improve the NV performance while ensuring the rigidity of the wheel 1, which is being increased in diameter. In this case, the challenge is to make it easy to attach the resonator 2 to the wheel 1 and to make it difficult for the resonator 2 to come off the wheel 1 as the wheel 1 rotates, and this challenge can be solved according to the above embodiment.

[0055] Furthermore, according to the resonator 2 of this embodiment, the ceiling surfaces of the inner holes of the first straight portion 221 and the third straight portion 223 in the tubular portion 22 are inclined surfaces that slope upward from one end to the other end in the direction of the central axis, and the ceiling surface of the inner hole of the second straight portion 222 is inclined surfaces that slope upward from the other end to one end in the direction of the central axis. Therefore, even if a liquid such as tire repair agent or water flows into the opening at one end of the first straight portion 221, the centrifugal force generated by the rotation of the wheel 1 will cause the liquid that flows into the first straight portion 221 to flow along the ceiling surface of the inner hole of the first straight portion 221 toward the second straight portion 222, and then along the ceiling surface of the inner hole of the second straight portion 222 toward the third straight portion 223, and finally be discharged from the opening at the other end of the third straight portion 223.

[0056] This prevents the liquid from remaining in the first to third straight sections 221 to 223, thereby preventing a deterioration in the effect of improving NV performance by the resonator 2 (the effect of reducing air column resonance noise in the air chamber between the wheel 1 and the tire (not shown)).

[0057] The present invention is not limited to the above-described embodiments, but can be modified as appropriate within the scope of the claims and the equivalents thereof.

[0058] (1) In the above embodiment, even if the wheel 1 does not have the notches 143, 153 in the outer vertical wall 14 and the inner vertical wall 15, it is possible to attach the resonator 2 according to the present invention to the wheel 1. In such a case, the same effects and advantages as those of the above embodiment can be obtained.

[0059] (2) In the above embodiment, the dimensions and number of the ribs 27, 28 of the resonator 2 along the circumferential direction can be set arbitrarily.

[0060] (3) In the above embodiment, it is possible to configure the resonator 2 without providing the left and right notches 23, 24 and the protruding pieces 25, 26 on the substrate 21. Even with such a configuration, the same effects and advantages as those of the above embodiment can be obtained.

[0061] (4) In the above embodiment, the cross-sectional height of each inner hole of the first straight portion 221 and the third straight portion 223 is set to gradually increase from the other end side (the fourth side of the substrate 21) toward the one end side (the third side of the substrate 21), and it is possible to configure the cross-sectional height of the inner hole of the second straight portion 222 to gradually increase from the one end side (the third side of the substrate 21) toward the other end side (the fourth side of the substrate 21).

[0062] As a result, the ceiling surfaces of the inner holes of the first straight section 221 and the third straight section 223 are inclined surfaces that slope upward from the other end to one end, and the ceiling surface of the inner hole of the second straight section 222 is inclined surfaces that slope upward from one end to the other end. The angle of this slope is arbitrary.

[0063] In this configuration, even if liquid such as tire repair agent or water flows in from the opening on the other end side of the third straight portion 223, the centrifugal force generated by the rotation of the wheel 1 causes the liquid to flow into the first straight portion 221 along the ceiling surface of the inner hole of the first straight portion 221 toward the second straight portion 222, and then along the ceiling surface of the inner hole of the second straight portion 222 toward the first straight portion 221, and is finally discharged from the opening on the other end side of the first straight portion 221. Even in this configuration, functions and effects comparable to those of the above embodiment can be obtained.

[0064] (5) In the above embodiment, the number of straight portions and the number of U-shaped portions of the tubular portion 22 of the resonator 2 can be set arbitrarily.

[0065] (6) In the above embodiment, the intervals between the plurality of notches 23 on the left side of the resonator 2 and the intervals between the plurality of notches 24 on the right side of the resonator 2 can be set arbitrarily.

[0066] (7) In the above embodiment, the width and protrusion dimensions along the longitudinal direction of the plurality of protruding pieces 25, 26 on the left and right sides of the resonator 2 can be set arbitrarily. [Industrial Applicability]

[0067] The present invention can be suitably used in a resonator. [Explanation of symbols]

[0068] 1 wheel 11 Rims 12 discs 13 Well section 14 Outer vertical wall 141 Groove 142 overhang 143 Notch 15 Inner vertical wall 151 Groove 152 overhang 153 Cutout 2 Resonators 21 PCB 22 Tubular part 221 1st straight section 222 2nd straight section 223 3rd straight section 224 1st U-shaped section 225 2nd U section 23 Left notch 24 Right notch 25 Left protrusion 26 Right protrusion 27,28 Ribs

Claims

1. A resonator having a configuration in which a single tubular portion having a zigzag shape is provided on a rectangular substrate, A resonator characterized in that a plurality of straight portions arranged side by side in parallel in the tubular portion are connected at a plurality of locations in the central axis direction by ribs.

2. 2. The resonator according to claim 1, a central axis of each of the linear portions is parallel to a first side and a second side that are opposed to each other among four sides of the substrate, an opening at one end side in a central axis direction of the tubular portion is disposed on one of a third side and a fourth side of the base plate that are orthogonal to the first side, A resonator characterized in that an opening on the other end side in the central axis direction of the tubular portion is located on the other of the third side and the fourth side.

3. 2. The resonator according to claim 1, The number of the linear portions is three, a central axis of each of the linear portions is parallel to a first side and a second side that are opposed to each other among four sides of the substrate, one end side in the central axis direction of each of the linear portions is disposed on one of a third side and a fourth side of the substrate that are orthogonal to the first side, and the other end side in the central axis direction of each of the linear portions is disposed on the other of the third side and the fourth side, One end side of the first linear portion located at the left end and the other end side of the third linear portion located at the right end are open, the other end of the first straight portion and the other end of the second straight portion located in the center are connected by a first U-shaped portion, A resonator characterized in that one end side of the second straight portion and one end side of a third straight portion located at the right end are connected by a second U-shaped portion.

4. 4. The resonator according to claim 3, a cross-sectional height of each inner hole of the first linear portion and the third linear portion is set to gradually increase from one end side to the other end side thereof, A resonator characterized in that the cross-sectional height of the inner hole of the second straight portion is set to gradually increase from the other end side toward the one end side.

5. 4. The resonator according to claim 3, a cross-sectional height of each inner hole of the first linear portion and the third linear portion is set to gradually increase from the other end side toward the one end side thereof, A resonator characterized in that the cross-sectional height of the inner hole of the second straight portion is set to gradually increase from one end side to the other end side.

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