Socket

Abstract

To provide a socket capable of applying sufficient torque to an oil filter.SOLUTION: An inner wall portion 34 of a socket 30 constitutes torque application parts 36 and relief parts 37. The torque application parts 36 are arranged to face each other across the center of a bottom surface part 31. The torque application parts 36 are configured to apply torque to an oil filter 20 when the oil filter is removed or attached. The relief parts 37 are arranged to face each other across the center of the bottom surface part 31 in a direction perpendicular to the direction where the torque application parts 36 face each other. The relief parts 37 are configured not to come into contact with the oil filter 20 when the oil filter is removed or attached.SELECTED DRAWING: Figure 6

Description

[Technical field]

[0001] The present invention relates to a socket used when removing and installing an oil filter. [Background technology]

[0002] Traditionally, engines are fitted with an oil filter. The role of the oil filter is to remove impurities and tiny particles from the engine oil. An oil filter basically consists of a filter material inside a sealed metal case. When the engine is running, the oil passes through the filter and any particles or impurities contained in the oil are trapped by the filter material.

[0003] Oil filters become clogged with particles over time. When the filter becomes clogged, oil cannot flow properly, which negatively impacts engine performance. For this reason, oil filters are changed regularly.

[0004] Patent Document 1 describes an invention relating to a jig for removing and installing an oil filter.

[0005] Patent Document 1 describes an oil filter wrench for removing an oil filter from an engine. Specifically, the oil filter wrench described in Patent Document 1 includes a cup-shaped wrench body. A plurality of meshing projections that mesh with the outer peripheral surface of the oil filter are provided in a spline pattern on the inner peripheral wall of the wrench body. Furthermore, meshing regions provided with a group of projections and non-meshing regions without meshing projections are alternately arranged around the entire inner peripheral wall of the wrench body. With this configuration, when the wrench body is placed over the top of the oil filter, the meshing projections of each projection group mesh with the outer peripheral surface of the oil filter, making it easy to remove the oil filter from the engine by rotating the wrench body. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Patent No. 7137824 Summary of the Invention [Problem to be solved by the invention]

[0007] However, in the invention described in the above-mentioned patent document, the shape of the outer peripheral surface of the oil filter is intended to be a spline shape that is easy to apply torque to, and is not compatible with the polygonal shape that is commonly used in passenger cars. Since the angle formed by the outer periphery of a polygonal oil filter is wide, the force in the sliding direction due to the tightening or loosening torque is large, making the filter prone to deformation, and it is also easily affected by the coating thickness on the outer peripheral surface, so there are areas that need improvement, such as the ease of inserting and removing the socket into the filter and damage to the outer peripheral surface of the filter.

[0008] Specifically, due to the non-uniformity of the thickness of the cationic paint that covers the outer peripheral surface of the oil filter, the surface dimensions of the oil filter include a certain tolerance. For example, the width of the oil filter is 66.1 mm at the minimum and 66.9 mm at the maximum, with the difference between the two being about 0.8 mm. On the other hand, since the design value of the width of the oil filter is 66.5 mm, the inner diameter of the socket used to remove and attach the oil filter is also set to 66.5 mm. In this case, when the socket is fitted into the oil filter, the degree of fit between the two becomes non-uniform. Therefore, in places where the fit between the oil filter and the socket is extremely large, a problem occurs in which the paint on the oil filter peels off. On the other hand, in places where the fit between the oil filter and the socket is small, a torque loss occurs, resulting in a problem of insufficient torque to rotate the oil filter.

[0009] The present invention has been made in consideration of the above problems, and an object of the present invention is to provide a socket that is capable of applying sufficient torque to an oil filter. [Means for solving the problem]

[0010] An embodiment of the present invention is a socket that is attached to a head of an oil filter when removing or installing the oil filter, the socket having a bottom surface portion having a generally plate-like shape and a side wall portion that is continuous with a peripheral portion of the bottom surface portion and has a generally cylindrical shape, the inner wall of the side wall portion having concave corners that are recessed in a shape corresponding to convex corners of the oil filter, and an inner wall portion that connects the concave corners, the inner wall portion constituting a torque application portion and a relief portion, the torque application portions are arranged to face each other across the center of the bottom surface portion and are configured to apply torque to the oil filter when removing or installing the oil filter, and the relief portions are arranged to face each other across the center of the bottom surface portion in a direction perpendicular to the direction in which the torque application portions face each other, and are configured not to come into contact with the oil filter when removing or installing the oil filter.

[0011] Furthermore, an embodiment of the present invention is a socket that is attached to a head of an oil filter when removing or installing the oil filter, the socket having a bottom surface portion having a generally plate-like shape, and a side wall portion that is continuous with a peripheral portion of the bottom surface portion and has a generally cylindrical shape, the inner wall of the side wall portion having concave corners that are recessed in a shape corresponding to convex corners of the oil filter, and an inner wall portion that connects the concave corners, the inner wall portion constituting a torque application portion, a relief portion, and an intermediate portion, the torque application portion is configured to apply torque to the oil filter when removing or installing the oil filter, the relief portion is configured not to come into contact with the oil filter when removing or installing the oil filter, and the intermediate portion is disposed between the torque application portion and the relief portion, and is configured to partially apply torque to the oil filter when removing or installing the oil filter. Effect of the Invention

[0012] According to the socket of the embodiment of the present invention, even if the head shape of the oil filter is not a regular polygon, the torque applying portion can reliably apply torque to the oil filter. Furthermore, the relief portion can absorb the irregular shape and prevent the paint coating the surface of the oil filter from peeling off.

[0013] Furthermore, according to the socket of the embodiment of the present invention, even if the head shape of the oil filter is, strictly speaking, a shape other than a regular polygon, the middle portion partially applies torque to the oil filter when removing or attaching it, thereby absorbing the irregular portion and suppressing peeling of the paint covering the surface of the oil filter. [Brief description of the drawings]

[0014] [Figure 1] 1 is a side view showing an engine equipped with an oil filter that is detachable by a socket according to an embodiment of the present invention. [Diagram 2] FIG. 2 is a perspective view showing an oil filter that is detached and attached by a socket according to an embodiment of the present invention. [Diagram 3] 1 is a perspective view showing a socket according to an embodiment of the present invention; [Figure 4] FIG. 2 is a plan view showing a socket according to the embodiment of the present invention. [Diagram 5] FIG. 2 is a plan view showing an oil filter rotated by a socket according to an embodiment of the present invention. [Figure 6] 1 is a plan view showing a state in which a socket according to an embodiment of the present invention is fitted to an oil filter. FIG. [Figure 7] 13 is a plan view showing a state in which a socket according to another embodiment of the present invention is fitted to an oil filter. FIG. [Figure 8] 13 is a plan view showing a state in which a socket according to another embodiment of the present invention is fitted to an oil filter. FIG. [Figure 9] 13 is a plan view showing a state in which a socket according to another embodiment of the present invention is fitted to an oil filter. FIG. [Figure 10] 13 is a plan view showing a state in which a socket according to another embodiment of the present invention is fitted to an oil filter. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0015] The socket 30 according to the embodiment of the present invention will be described in detail below with reference to the drawings. In the following description, the front, rear, up, down, left and right directions are used, and up and down refer to the up and down when the socket 30 shown in Fig. 3 is attached to the oil filter 20 attached to the engine 11. Furthermore, in the following description, the same members are generally given the same reference numerals, and repeated description will be omitted.

[0016] FIG. 1 is a side view showing an engine 11 equipped with an oil filter 20 that is detachable by a socket 30.

[0017] The engine 11 is, for example, a horizontally opposed engine. The engine 11 is attached to the body of the vehicle 10 and generates power for propelling the vehicle 10.

[0018] The oil filter 20 is attached to the upper surface of the engine 11. Engine oil circulating inside the engine 11 passes through the oil filter 20. Impurities contained in the engine oil are removed by passing the engine oil through filter paper inside the oil filter 20. As described above, the oil filter 20 is detachable from the engine 11. Specifically, the oil filter 20 is attached to the socket 30 by rotating the oil filter 20 in one direction using the socket 30 described below. On the other hand, the oil filter 20 can be removed from the socket 30 by rotating the oil filter 20 in the opposite direction using the socket 30.

[0019] 2 is a perspective view showing the oil filter 20. The oil filter 20 has a filter element made of filter paper (not shown) housed in a container portion 24 made of metal. An opening through which engine oil flows is formed in the lower surface of the container portion 24. A thread groove is formed on the inner surface of the lower end of the container portion 24 for screwing into the engine 11 described above.

[0020] The outer surface of the container portion 24, i.e., the side surface and the top surface, is subjected to cationic coating. As described above, the thickness of the cationic coating has a certain degree of non-uniformity. In this embodiment, even if the width of the container portion 24 is non-uniform due to the non-uniformity of the thickness of the cationic coating, the socket 30 described below can apply sufficient rotational torque to the oil filter 20. Furthermore, in this embodiment, when torque is applied to the oil filter 20 by the socket 30, peeling off of the coating covering the surface of the container portion 24 can be suppressed.

[0021] The upper end of the container portion 24 is defined as a head portion 21. When installing or removing the oil filter 20, a socket 30, which will be described later, is fitted into the head portion 21. A plurality of outer wall portions 23 are formed along the circumferential direction of the head portion 21. The outer wall portions 23 are portions where the side surface of the container portion 24 is partially flattened. Convex corners 22 are formed between the outer wall portions 23. The convex corners 22 are corners that protrude radially outward.

[0022] FIG. 3 is a perspective view showing the socket 30. As shown in FIG.

[0023] The socket 30 is a tool that is attached to the head 21 of the oil filter 20 when removing or attaching the oil filter 20 shown in FIG. 2. When removing or attaching the oil filter 20, a handle (not shown) is attached to the socket 30. The worker rotates the handle (not shown) to rotate the oil filter 20 via the socket 30. This allows the oil filter 20 to be removed or attached to the vehicle 10.

[0024] The socket 30 has a generally plate-like bottom surface portion 31 and a generally cylindrical side wall portion 32 that is continuous with the peripheral edge of the bottom surface portion 31. The internal shape and size of the socket 30 are such that the head portion 21 of the oil filter 20 shown in FIG.

[0025] The surface of the side wall portion 32 facing radially inward is an inner wall 33. The inner wall 33 has recessed corners 35 recessed in a shape corresponding to the convex corners 22 of the oil filter 20, and inner wall portions 34 connecting the recessed corners 35. Details of the inner wall 33, the inner wall portions 34, and the recessed corners 35 will be described with reference to FIG.

[0026] Fig. 4 is a plan view showing socket 30. Fig. 4 shows the socket 30 shown in Fig. 3 turned upside down. An example of a first torque applying portion described in the claims is torque applying portion 36A shown in Fig. 4. Also, an example of a second torque applying portion described in the claims is torque applying portion 36B shown in Fig. 4.

[0027] As described above, the inner wall 33 of the socket 30 has the inner wall portion 34 and the recessed corner portion 35. The inner wall portion 34 is a substantially flat portion. The recessed corner portion 35 is a corner portion that protrudes radially outward. The inner wall portion 34 and the recessed corner portion 35 are alternately arranged along the circumferential direction.

[0028] The inner wall portion 34 has inner wall portion 34A to inner wall portion 34J. Specifically, the inner wall portion 34 has, in a clockwise direction, inner wall portion 34A, inner wall portion 34B, inner wall portion 34C, inner wall portion 34D, inner wall portion 34E, inner wall portion 34F, inner wall portion 34G, inner wall portion 34H, inner wall portion 34I, and inner wall portion 34J.

[0029] The concave corner 35 has concave corner 35A to concave corner 35J. Specifically, the concave corner 35 has, in a clockwise direction, concave corner 35A, concave corner 35B, concave corner 35C, concave corner 35D, concave corner 35E, concave corner 35F, concave corner 35G, concave corner 35H, concave corner 35I, and concave corner 35J. The concave corner 35A is disposed between the inner wall portion 34J and the inner wall portion 34A. The concave corner 35B is disposed between the inner wall portion 34A and the inner wall portion 34B. The concave corner 35C is disposed between the inner wall portion 34B and the inner wall portion 34C. The concave corner 35D is disposed between the inner wall portion 34C and the inner wall portion 34D. Recessed corner 35E is disposed between inner wall portion 34D and inner wall portion 34E. Recessed corner 35F is disposed between inner wall portion 34E and inner wall portion 34F. Recessed corner 35G is disposed between inner wall portion 34F and inner wall portion 34G. Recessed corner 35H is disposed between inner wall portion 34G and inner wall portion 34H. Recessed corner 35I is disposed between inner wall portion 34H and inner wall portion 34I. Recessed corner 35J is disposed between inner wall portion 34I and inner wall portion 34J.

[0030] Here, the inner wall portion 34 constitutes a torque applying portion 36, a recessed portion 37, and an intermediate portion 38. In Fig. 4, the torque applying portion 36, the recessed portion 37, and the intermediate portion 38 are surrounded by dotted lines.

[0031] The inner wall portion 34 has an irregular decagonal shape composed of the inner wall portion 34A to the wall portion 34J. Furthermore, the circumferential lengths of the inner wall portion 34A to the inner wall portion 34J are not equal to each other. Specifically, the circumferential lengths of the inner wall portion 34A, the inner wall portion 34E, the inner wall portion 34F, and the inner wall portion 34J are equal to each other and are approximately equal to the circumferential length of the convex corner portion 22 of the oil filter 20 described later. On the other hand, the circumferential lengths of the inner wall portion 34B, the inner wall portion 34C, the inner wall portion 34D, the inner wall portion 34G, the inner wall portion 34H, and the inner wall portion 34I are longer than the inner wall portion 34A, etc.

[0032] The torque application portion 36 has a torque application portion 36A and a torque application portion 36B which face each other in the front-rear direction. The torque application portion 36A and the torque application portion 36B are arranged to face each other across the center 25 of the bottom surface portion 31. More specifically, the torque application portion 36B is arranged at a position 180 degrees symmetrical to the torque application portion 36A across the center 25 of the bottom surface portion 31. The torque application portion 36A and the torque application portion 36B are configured to apply torque to the oil filter 20 when removing or attaching the oil filter 20. The torque application portion 36A includes an inner wall portion 34J, a recessed corner portion 35A, and an inner wall portion 34A. The torque application portion 36B includes an inner wall portion 34E, a recessed corner portion 35F, and an inner wall portion 34F.

[0033] The recess 37 has recess 37A and recess 37B. Recess 37A and recess 37B face each other in the left-right direction across center 25. Here, the left-right direction is a direction perpendicular to the front-rear direction in which torque applying portion 36A and torque applying portion 36B face each other. Recess 37A includes recessed corner 35H, inner wall portion 34H, and recessed corner 35I. Recess 37B includes recessed corner 35C, inner wall portion 34C, and recessed corner 35D. Recess 37A and recess 37B are configured not to come into contact with oil filter 20 when oil filter 20 is attached or detached.

[0034] Here, the distance between recessed corner portion 35A and recessed corner portion 35F that constitute torque application portion 36 is defined as L10. Furthermore, the distance between inner wall portion 34C and inner wall portion 34H that constitute relief portion 37 is defined as L11. Here, L11 is made longer than L10. With this configuration, when socket 30 is used to attach or detach oil filter 20, inner wall portion 34C and inner wall portion 34H that constitute relief portion 37 can be separated from the side surface of oil filter 20.

[0035] The intermediate portion 38 is disposed between the torque application portion 36 and the relief portion 37, and is configured to partially apply torque to the oil filter 20 when the oil filter 20 is attached or detached. In other words, when the oil filter 20 is attached or detached, a portion of the intermediate portion 38 contacts the outer wall portion 23 of the oil filter 20, and another portion does not contact the outer wall portion 23 of the oil filter 20. Specifically, the intermediate portion 38 has an intermediate portion 38A, an intermediate portion 38B, an intermediate portion 38C, and an intermediate portion 38D. Here, the intermediate portion 38A is the inner wall portion 34B, the intermediate portion 38B is the inner wall portion 34D, the intermediate portion 38C is the inner wall portion 34G, and the intermediate portion 38D is the inner wall portion 34I.

[0036] The intermediate portion 38A and the intermediate portion 38D are disposed on both ends of the torque applying portion 36A in the circumferential direction. The portions of the intermediate portion 38A and the intermediate portion 38D that are close to the torque applying portion 36A contact the oil filter 20 and apply torque. On the other hand, the portions of the intermediate portion 38A and the intermediate portion 38D that are away from the torque applying portion 36A do not contact the oil filter 20 and do not apply torque.

[0037] Furthermore, the intermediate portion 38B and the intermediate portion 38C are disposed on both ends of the torque applying portion 36B in the circumferential direction. The portions of the intermediate portion 38B and the intermediate portion 38C that are close to the torque applying portion 36B contact the oil filter 20 and apply torque. On the other hand, the portions of the intermediate portion 38B and the intermediate portion 38C that are away from the torque applying portion 36B do not contact the oil filter 20 and do not apply torque.

[0038] Here, the intermediate portion 38 is longer than the outer wall portion 23 of the oil filter 20 in the circumferential direction. Specifically, referring to FIG. 4, the length of the inner wall portion 34B, which is the intermediate portion 38A, in the circumferential direction is L12. Also, referring to FIG. 5, the length of the outer wall portion 23B in the circumferential direction is L22. In this case, the length L12 of the inner wall portion 34B is longer than the length L22 of the outer wall portion 23B. Similarly, the inner wall portion 34D constituting the intermediate portion 38B, the inner wall portion 34G constituting the intermediate portion 38C, and the inner wall portion 34I constituting the intermediate portion 38D shown in FIG. 4 are longer in the circumferential direction than the outer wall portion 23F, the outer wall portion 23I, and the outer wall portion 23M shown in FIG. 5. In this way, referring to FIG. 4, the inner wall portion 34H and the inner wall portion 34C can be disposed radially outward and separated from the outer wall portion 23K and the outer wall portion 23D shown in FIG. 5.

[0039] FIG. 5 is a plan view showing the oil filter 20 rotated by the socket 30. As shown in FIG.

[0040] The head 21 of the oil filter 20 has convex corners 22 and an outer wall portion 23. The convex corners 22 and the outer wall portion 23 are arranged alternately in the circumferential direction. The head 21 has a regular tetradecagonal shape as a whole.

[0041] The outer wall portion 23 is a substantially flat surface facing radially outward. The outer wall portion 23 has outer wall portion 23A to outer wall portion 23N. Specifically, the outer wall portion 23 has, in a clockwise direction, outer wall portion 23A, outer wall portion 23B, outer wall portion 23C, outer wall portion 23D, outer wall portion 23E, outer wall portion 23F, wall portion 23G, outer wall portion 23H, outer wall portion 23I, outer wall portion 23J, outer wall portion 23K, outer wall portion 23L, outer wall portion 23M, and outer wall portion 23N. The lengths of the outer wall portions 23A to 23N in the circumferential direction are substantially equal.

[0042] The convex corner 22 is a corner that protrudes radially outward. The convex corner 22 has convex corners 22A to 22N. The convex corner 22A is disposed between the outer wall portion 23N and the outer wall portion 23A. The convex corner 22B is disposed between the outer wall portion 23A and the outer wall portion 23B. The convex corner 22C is disposed between the outer wall portion 23B and the outer wall portion 23C. The convex corner 22D is disposed between the outer wall portion 23C and the outer wall portion 23D. The convex corner 22E is disposed between the outer wall portion 23D and the outer wall portion 23E. The convex corner 22F is disposed between the outer wall portion 23E and the outer wall portion 23F. The convex corner 22G is disposed between the outer wall portion 23F and the outer wall portion 23G. The convex corner 22H is disposed between the outer wall portion 23G and the outer wall portion 23H. The convex corner 22I is disposed between the outer wall portion 23H and the outer wall portion 23I. The convex corner 22J is disposed between the outer wall portion 23I and the outer wall portion 23J. The convex corner 22K is disposed between the outer wall portion 23J and the outer wall portion 23K. The convex corner 22L is disposed between the outer wall portion 23K and the outer wall portion 23L. The convex corner 22M is disposed between the outer wall portion 23L and the outer wall portion 23M. The convex corner 22N is disposed between the outer wall portion 23M and the outer wall portion 23N.

[0043] Fig. 6 is a plan view showing the state in which the socket 30 is fitted into the head 21 of the oil filter 20 when the oil filter 20 is removed from the engine 11. In this figure, for clarity of illustration, the oil filter 20 and the socket 30 are shown separated from each other even in a portion where they are in close contact with each other at the torque application portion 36. The same applies to Fig. 7 and subsequent figures.

[0044] When an operator removes or installs the oil filter 20, the operator places the socket 30 shown in Fig. 3 over the head 21 of the oil filter 20 in the state shown in Fig. 1 and Fig. 2. In this state, the operator rotates a jig (not shown) connected to the socket 30 clockwise or counterclockwise. When this is done, a rotational torque is transmitted to the oil filter 20 via the socket 30, causing the oil filter 20 to rotate slightly. This rotates the threaded structure formed between the oil filter 20 and the engine 11, allowing the oil filter 20 to be removed or installed.

[0045] The torque application portion 36 of the socket 30 is in substantial contact with the outer wall portion 23 of the oil filter 20, thereby transmitting torque from the socket 30 to the head portion 21 of the oil filter 20. Specifically, the torque application portion 36 has a torque application portion 36A and a torque application portion 36B that face each other in the front-rear direction.

[0046] In torque application portion 36A, inner wall portion 34J, recessed corner portion 35A, and inner wall portion 34A transmit torque by being in close contact with outer wall portion 23N, convex corner portion 22A, and outer wall portion 23A of oil filter 20. In torque application portion 36B, inner wall portion 34E, recessed corner portion 35F, and inner wall portion 34F transmit torque by being in close contact with outer wall portion 23G, convex corner portion 22H, and outer wall portion 23H of oil filter 20. With this configuration, torque is effectively transmitted from socket 30 to oil filter 20 in torque application portion 36.

[0047] The recess 37 of the socket 30 has recesses 37A and 37B that face each other in the left-right direction. In recess 37A, the inner wall portion 34H is spaced apart from the outer wall portion 23K of the oil filter 20. In recess 37B, the inner wall portion 34C is spaced apart from the outer wall portion 23D of the oil filter 20. Therefore, even if the shape of the oil filter 20 differs from the design value due to unevenness in the paint covering the surface of the oil filter 20, the recesses 37A and 37B function as buffer regions to suppress paint peeling, etc.

[0048] Intermediate portion 38 of socket 30 includes intermediate portion 38A, intermediate portion 38B, intermediate portion 38C and intermediate portion 38D.

[0049] The left side portion of the inner wall portion 34B constituting the intermediate portion 38A abuts against the outer wall portion 23B of the oil filter 20, and transmits torque to the oil filter 20. On the other hand, the right side portion of the inner wall portion 34B does not abut against the outer wall portion 23B.

[0050] The left side portion of inner wall portion 34D constituting intermediate portion 38B abuts against outer wall portion 23F of oil filter 20 to transmit torque to oil filter 20. On the other hand, the right side portion of inner wall portion 34D does not abut against outer wall portion 23F.

[0051] The right side portion of the inner wall portion 34G constituting the intermediate portion 38C abuts against the outer wall portion 23I of the oil filter 20, and transmits torque to the oil filter 20. On the other hand, the left side portion of the inner wall portion 34G does not abut against the outer wall portion 23I.

[0052] The right side portion of the inner wall portion 34I constituting the intermediate portion 38D abuts against the outer wall portion 23M of the oil filter 20 to transmit torque to the oil filter 20. On the other hand, the left side portion of the inner wall portion 34I does not abut against the outer wall portion 23M.

[0053] As described above, torque is transmitted from the socket 30 to the oil filter 20 by the inner wall portion 34 that constitutes the torque application portion 36 and the intermediate portion 38. Specifically, torque is transmitted from the socket 30 to the oil filter 20 by inner wall portion 34A of the socket 30, a portion of inner wall portion 34B, a portion of inner wall portion 34D, inner wall portion 34E, inner wall portion 34F, a portion of inner wall portion 34G, a portion of inner wall portion 34I, and inner wall portion 34J.

[0054] The contact point 39 is the location where the convex corner 22 of the oil filter 20 and the inner wall portion 34 of the socket 30 come into contact.

[0055] Specifically, the contact points 39 include contact points 39A, 39B, 39C, and 39D. The contact point 39A is a point where the convex corner 22C of the oil filter 20 contacts the middle part of the inner wall part 34B of the socket 30. The contact point 39B is a point where the convex corner 22F of the oil filter 20 contacts the middle part of the inner wall part 34D of the socket 30. The contact point 39C is a point where the convex corner 22J of the oil filter 20 contacts the middle part of the inner wall part 34G of the socket 30. The contact point 39D is a point where the convex corner 22M of the oil filter 20 contacts the middle part of the inner wall part 34I of the socket 30.

[0056] After the oil filter 20 is attached or detached using the socket 30, the degree of wear of the socket 30 can be measured by visually checking the contact points 39.

[0057] For example, when the socket 30 is less worn, the amount of relative movement between the convex corner 22C and the inner wall portion 34B at the contact point 39A is small. Therefore, after attachment and detachment, the paint covering the convex corner 22C does not adhere to the inner wall portion 34B in large amounts. The same applies to the other contact points 39B, 39C, and 39D.

[0058] On the other hand, when the wear of the socket 30 exceeds a certain level, the fit between the oil filter 20 and the socket 30 weakens, and the amount of relative movement between the convex corner 22C and the inner wall portion 34B at the contact point 39A increases. Therefore, after attachment and detachment, a large amount of paint covering the convex corner 22C adheres to the inner wall portion 34B. The same applies to the other contact points 39B, 39C, and 39D.

[0059] Therefore, by checking the amount of paint adhering to the contact point 39 after removing and attaching the oil filter 20 using the socket 30, it is possible to check the degree of wear of the inner wall portion 34 and the recessed corner portion 35 of the socket 30. For this reason, if the amount of paint adhering to the contact point 39 is found to be greater than a certain amount, the socket 30 is severely worn and it is preferable to replace the socket 30.

[0060] In addition, in the circumferential direction, the length of the inner wall portion 34B constituting the intermediate portion 38A is longer than the outer wall portion 23B. The same applies to the intermediate portions 38B, 38C, and 38D. In this manner, the inner wall portion 34C can be separated from the outer wall portion 23D at the relief portion 37B. Similarly, the inner wall portion 34H can be separated from the outer wall portion 23K at the relief portion 37A.

[0061] Moreover, the intermediate portion 38A and the intermediate portion 38D are disposed on both sides of the torque applying portion 36A in the circumferential direction. In other words, the intermediate portion 38A and the intermediate portion 38D are disposed so as to sandwich the torque applying portion 36A in the circumferential direction. In this way, the intermediate portion 38A and the intermediate portion 38D can be disposed as buffer regions on both sides of the torque applying portion 36A, and uneven distribution of torque, etc. can be suppressed. The same applies to the torque applying portion 36B.

[0062] Further, referring to FIG. 6, in this embodiment, the clearance between the inner wall portion 34 and the outer wall portion 23 in the relief portion 37 is configured to be minimum. Specifically, in the relief portion 37A, when the oil filter 20 and the socket 30 are considered to be substantially circular, the inner wall portion 34H is a side that is substantially parallel to the normal line. Furthermore, the front end of the inner wall portion 34H is connected to a portion that is an extension of the inner wall portion 34I. Furthermore, the rear end of the inner wall portion 34H is connected to a portion that is an extension of the inner wall portion 34G. Furthermore, the distance between the inner wall portion 34H of the socket 30 and the outer wall portion 23K of the oil filter 20 is shortened to a range where the two do not contact each other, and is, for example, 1.0 mm or more and 5.0 mm or less. The same applies to the relief portion 37B. In this way, the strength of the socket 30 can be secured to a certain level or more, and the socket 30 can be made smaller in size.

[0063] An oil filter 201 according to another embodiment and a socket 301 and other components used for attaching and detaching the oil filter 201 will be described with reference to Figures 7 to 10. Figures 7 to 10 are plan views showing the state in which the socket 301 and other components are fitted into the head 21 of the oil filter 201 when attaching or detaching the oil filter 201. In Figures 7 to 10, parts that are the same as or similar to those shown in Figure 6 and other figures are given the same reference numerals, and detailed explanations will be omitted.

[0064] The basic configuration of oil filter 201 etc. shown in Figures 7 to 10 is substantially the same as that of oil filter 20 shown in Figure 2 etc., except that head portion 21 has a regular pentagonal shape. That is, referring to Figure 7, head portion 21 of oil filter 201 has outer wall portion 23A to outer wall portion 23O. Also, head portion 21 of oil filter 201 has convex corner portion 22A to convex corner portion 22O as convex corner portion 22.

[0065] The basic configuration of the socket 301 etc. is substantially the same as that of the socket 30 shown in Fig. 4 etc., but differs in the configuration of the inner wall portion 34 and the recessed corner portion 35. The specific configuration of the socket 301 will be described later with reference to Fig. 7 and subsequent figures. The socket 301 etc. shown in Figs. 7 to 10 also achieves the same effects as the socket 30 described above.

[0066] The configuration of the socket 301 will be described with reference to FIG.

[0067] Socket 301 has thirteen inner wall regions 34 consisting of inner wall region 34A through inner wall region 34M. In addition to the components of socket 30 described above, socket 301 has inner wall region 34K, inner wall region 34L, and inner wall region 34M. Furthermore, socket 301 has thirteen recessed corners 35 consisting of recessed corners 35A through 35M. In addition to the components of socket 30 described above, socket 301 has recessed corners 35K, recessed corners 35L, and recessed corners 35M. Furthermore, inner wall regions 34 of socket 301 are symmetrical in the left-right direction and asymmetrical in the front-rear direction.

[0068] The socket 301 has a torque applying portion 36, a recessed portion 37 and an intermediate portion 38, similar to the socket 30 described above.

[0069] The torque applying portion 36 has a torque applying portion 36A and a torque applying portion 36B. Torque is effectively transmitted from the socket 301 to the oil filter 201 at the torque applying portion 36A and the torque applying portion 36B.

[0070] Here, the first torque applying portion described in the claims is, for example, torque applying portion 36A. Also, the second torque applying portion described in the claims is, for example, torque applying portion 36B. As described later, torque applying portion 36A has two to four inner wall portions 34. Also, torque applying portion 36B has three to four inner wall portions 34.

[0071] In torque application portion 36A, inner wall portion 34L, concave corner portion 35M, inner wall portion 34M, concave corner portion 35A, inner wall portion 34A, concave corner portion 35B and inner wall portion 34B of socket 301 are in close contact with outer wall portion 23N, convex corner portion 22O, outer wall portion 23O, convex corner portion 22A, outer wall portion 23A, convex corner portion 22B and outer wall portion 23B of oil filter 201, thereby transmitting torque.

[0072] In the torque application portion 36B, the inner wall portion 34F, the concave corner portion 35G, the inner wall portion 34G, the concave corner portion 35H and the inner wall portion 34H of the socket 301 are in close contact with the outer wall portion 23G, the convex corner portion 22H, the outer wall portion 23H, the convex corner portion 22I and the outer wall portion 23I of the oil filter 201 to transmit the torque.

[0073] The recess 37 of the socket 301 has a recess 37A and a recess 37B that face each other in the left-right direction.

[0074] At the relief portion 37A, the inner wall portion 34J of the socket 301 is separated from the outer wall portion 23K, the convex corner portion 22L, and the outer wall portion 23L of the oil filter 201. At the relief portion 37B, the inner wall portion 34D of the socket 301 is separated from the outer wall portion 23D, the convex corner portion 22E, and the outer wall portion 23E of the oil filter 201. Therefore, even if the shape of the oil filter 201 differs from the design value due to unevenness in the paint covering the surface of the oil filter 201, etc., the relief portions 37A and 37B function as buffer regions to suppress paint peeling, etc.

[0075] Intermediate portion 38 has intermediate portion 38A, intermediate portion 38B, intermediate portion 38C and intermediate portion 38D.

[0076] The left side portion of inner wall portion 34C constituting intermediate portion 38A abuts against outer wall portion 23C of oil filter 201, and transmits torque to oil filter 201. On the other hand, the right side portion of inner wall portion 34C does not abut against outer wall portion 23C.

[0077] The left side portion of inner wall portion 34E constituting intermediate portion 38B abuts against outer wall portion 23F of oil filter 201 to transmit torque to oil filter 201. On the other hand, the right side portion of inner wall portion 34E does not abut against outer wall portion 23F.

[0078] The right side portion of inner wall portion 34I constituting intermediate portion 38C abuts against outer wall portion 23J of oil filter 201 to transmit torque to oil filter 201. On the other hand, the left side portion of inner wall portion 34I does not abut against outer wall portion 23J.

[0079] The right side portion of inner wall portion 34K constituting intermediate portion 38D abuts against outer wall portion 23M of oil filter 201 to transmit torque to oil filter 201. On the other hand, the left side portion of inner wall portion 34K does not abut against outer wall portion 23M.

[0080] As a result of the above, torque is transmitted from socket 301 to oil filter 201 by each wall portion constituting torque application portion 36 and intermediate portion 38. Specifically, torque is transmitted from socket 301 to oil filter 201 by inner wall portion 34A, inner wall portion 34B, a portion of inner wall portion 34C, a portion of inner wall portion 34E, inner wall portion 34F, inner wall portion 34G, inner wall portion 34H, a portion of inner wall portion 34I, a portion of inner wall portion 34K, inner wall portion 34L, and inner wall portion 34M of socket 301.

[0081] The contact point 39 is the location where the convex corner 22 of the oil filter 201 and the inner wall portion 34 of the socket 301 come into contact with each other.

[0082] Specifically, the contact points 39 include contact points 39A, 39B, 39C, and 39D. The contact point 39A is a point where the convex corner 22D of the oil filter 201 contacts a middle portion of the inner wall portion 34C of the socket 301. The contact point 39B is a point where the convex corner 22F of the oil filter 201 contacts a middle portion of the inner wall portion 34E of the socket 301. The contact point 39C is a point where the convex corner 22K of the oil filter 201 contacts a middle portion of the inner wall portion 34I of the socket 301. The contact point 39D is a point where the convex corner 22M of the oil filter 201 contacts a middle portion of the inner wall portion 34K of the socket 301.

[0083] The configuration of the socket 302 will be described with reference to FIG.

[0084] Socket 302 has eleven inner wall portions 34 consisting of inner wall portion 34A through inner wall portion 34K. Furthermore, socket 302 has eleven recessed corner portions 35 consisting of recessed corner portions 35A through 35K. Furthermore, inner wall portions 34 of socket 302 are shaped symmetrically in the left-right direction and asymmetrically in the front-rear direction.

[0085] The socket 302 has a torque applying portion 36, a recessed portion 37 and an intermediate portion 38, similar to the socket 30 described above.

[0086] The torque application portion 36 has a torque application portion 36A and a torque application portion 36B that face each other in the front-rear direction. Torque is effectively transmitted from the socket 302 to the oil filter 201 at the torque application portion 36A and the torque application portion 36B.

[0087] In the torque application portion 36A, the inner wall portion 34K, the recessed corner portion 35A and the inner wall portion 34A of the socket 302 come into close contact with the outer wall portion 23O, the protruding corner portion 22A and the outer wall portion 23A of the oil filter 201 to transmit torque.

[0088] In the torque application portion 36B, the inner wall portion 34E, the concave corner portion 35F, the inner wall portion 34F, the concave corner portion 35G and the inner wall portion 34G of the socket 302 are in close contact with the outer wall portion 23G, the convex corner portion 22H, the outer wall portion 23H, the convex corner portion 22I and the outer wall portion 23I of the oil filter 201, thereby transmitting the torque.

[0089] The recess 37 of the socket 302 has a recess 37A and a recess 37B that face each other in the left-right direction.

[0090] At the relief portion 37A, the inner wall portion 34I of the socket 302 is spaced apart from the outer wall portion 23K, the convex corner portion 22L, the outer wall portion 23L, the convex corner portion 22M, and the outer wall portion 23M of the oil filter 201. At the relief portion 37B, the inner wall portion 34C of the socket 302 is spaced apart from the outer wall portion 23C, the convex corner portion 22D, the convex corner portion 22E, and the outer wall portion 23E of the oil filter 201. Therefore, even if the shape of the oil filter 201 differs from the design value due to unevenness in the paint covering the surface of the oil filter 201, the relief portions 37A and 37B function as buffer regions, and peeling of the paint, etc. is suppressed.

[0091] Intermediate portion 38 has intermediate portion 38A, intermediate portion 38B, intermediate portion 38C and intermediate portion 38D.

[0092] The left side portion of inner wall portion 34B constituting intermediate portion 38A abuts against outer wall portion 23B of oil filter 201, transmitting torque to oil filter 201. On the other hand, the right side portion of inner wall portion 34B does not abut against outer wall portion 23B.

[0093] The left side portion of inner wall portion 34D constituting intermediate portion 38B abuts against outer wall portion 23F of oil filter 201 to transmit torque to oil filter 201. On the other hand, the right side portion of inner wall portion 34D does not abut against outer wall portion 23F.

[0094] The right side portion of inner wall portion 34H constituting intermediate portion 38C abuts against outer wall portion 23J of oil filter 201 to transmit torque to oil filter 201. On the other hand, the left side portion of inner wall portion 34H does not abut against outer wall portion 23J.

[0095] The right side portion of inner wall portion 34J constituting intermediate portion 38D abuts against outer wall portion 23N of oil filter 201 to transmit torque to oil filter 201. On the other hand, the left side portion of inner wall portion 34J does not abut against outer wall portion 23N.

[0096] As a result of the above, torque is transmitted from socket 302 to oil filter 201 by each wall portion constituting torque application portion 36 and intermediate portion 38. Specifically, torque is transmitted from socket 302 to oil filter 201 by inner wall portion 34A, a portion of inner wall portion 34B, a portion of inner wall portion 34D, inner wall portion 34E, inner wall portion 34F, inner wall portion 34G, a portion of inner wall portion 34H, a portion of inner wall portion 34J, and inner wall portion 34K of socket 302.

[0097] The contact point 39 is the location where the convex corner portion 22 of the oil filter 201 and the inner wall portion 34 of the socket 302 come into contact with each other.

[0098] Specifically, the contact points 39 include contact points 39A, 39B, 39C, and 39D. The contact point 39A is a point where the convex corner 22C of the oil filter 201 contacts a middle portion of the inner wall portion 34B of the socket 302. The contact point 39B is a point where the convex corner 22F of the oil filter 201 contacts a middle portion of the inner wall portion 34D of the socket 302. The contact point 39C is a point where the convex corner 22K of the oil filter 201 contacts a middle portion of the inner wall portion 34H of the socket 302. The contact point 39D is a point where the convex corner 22N of the oil filter 201 contacts a middle portion of the inner wall portion 34J of the socket 302.

[0099] The configuration of the socket 303 will be described with reference to FIG.

[0100] Socket 303 has thirteen inner wall regions 34 consisting of inner wall region 34A through inner wall region 34M. Furthermore, socket 303 has thirteen recessed corners 35 consisting of recessed corners 35A through 35M. Moreover, inner wall regions 34 of socket 303 as a whole are symmetrical in the left-right direction and asymmetrical in the front-rear direction.

[0101] The socket 303 has a torque applying portion 36, a recessed portion 37 and an intermediate portion 38, similar to the socket 30 described above.

[0102] The torque application portion 36 has a torque application portion 36A and a torque application portion 36B that face each other in the front-rear direction. Torque is effectively transmitted from the socket 303 to the oil filter 201 at the torque application portion 36A and the torque application portion 36B.

[0103] At the torque application portion 36A, the inner wall portion 34M, the recessed corner portion 35A and the inner wall portion 34A of the socket 303 come into close contact with the outer wall portion 23O, the protruding corner portion 22A and the outer wall portion 23A of the oil filter 201 to transmit torque.

[0104] In torque application portion 36B, inner wall portion 34E, concave corner portion 35F, inner wall portion 34F, concave corner portion 35G, inner wall portion 34G, concave corner portion 35H, inner wall portion 34H, concave corner portion 35I and inner wall portion 34I of socket 303 come into close contact with outer wall portion 23F, convex corner portion 22G, outer wall portion 23G, convex corner portion 22H, outer wall portion 23H, convex corner portion 22I, outer wall portion 23I, convex corner portion 22J and outer wall portion 23J of oil filter 201 and transmit torque.

[0105] The recess 37 of the socket 303 has a recess 37A and a recess 37B that face each other in the left-right direction.

[0106] At the relief portion 37A, the inner wall portion 34K of the socket 303 is separated from the outer wall portion 23L, the convex corner portion 22M, and the outer wall portion 23M of the oil filter 201. At the relief portion 37B, the inner wall portion 34C of the socket 303 is separated from the outer wall portion 23C, the convex corner portion 22D, and the outer wall portion 23D of the oil filter 201. Therefore, even if the shape of the oil filter 201 differs from the design value due to unevenness in the paint covering the surface of the oil filter 201, etc., the relief portions 37A and 37B function as buffer regions to suppress paint peeling, etc.

[0107] Intermediate portion 38 has intermediate portion 38A, intermediate portion 38B, intermediate portion 38C and intermediate portion 38D.

[0108] The left side portion of inner wall portion 34B constituting intermediate portion 38A abuts against outer wall portion 23B of oil filter 201, transmitting torque to oil filter 201. On the other hand, the right side portion of inner wall portion 34B does not abut against outer wall portion 23B.

[0109] The left side portion of inner wall portion 34D constituting intermediate portion 38B abuts against outer wall portion 23E of oil filter 201 to transmit torque to oil filter 201. On the other hand, the right side portion of inner wall portion 34D does not abut against outer wall portion 23E.

[0110] The right side portion of inner wall portion 34J constituting intermediate portion 38C abuts against outer wall portion 23K of oil filter 201 to transmit torque to oil filter 201. On the other hand, the left side portion of inner wall portion 34J does not abut against outer wall portion 23K.

[0111] The right side portion of inner wall portion 34L constituting intermediate portion 38D abuts against outer wall portion 23N of oil filter 201 to transmit torque to oil filter 201. On the other hand, the left side portion of inner wall portion 34L does not abut against outer wall portion 23N.

[0112] As a result of the above, torque is transmitted from socket 303 to oil filter 201 by each wall portion constituting torque application portion 36 and intermediate portion 38. Specifically, torque is transmitted from socket 303 to oil filter 201 by inner wall portion 34A, a portion of inner wall portion 34B, a portion of inner wall portion 34D, inner wall portion 34E, inner wall portion 34F, inner wall portion 34G, inner wall portion 34H, inner wall portion 34I, a portion of inner wall portion 34J, a portion of inner wall portion 34L, and inner wall portion 34M of socket 303.

[0113] The contact point 39 is the location where the convex corner 22 of the oil filter 201 and the inner wall portion 34 of the socket 303 come into contact with each other.

[0114] Specifically, the contact point 39 includes contact point 39A, contact point 39B, contact point 39C, and contact point 39D. Contact point 39A is a point where the convex corner 22C of the oil filter 201 contacts a middle portion of the inner wall portion 34B of the socket 303. Contact point 39B is a point where the convex corner 22E of the oil filter 201 contacts a middle portion of the inner wall portion 34D of the socket 303. Contact point 39C is a point where the convex corner 22L of the oil filter 201 contacts a middle portion of the inner wall portion 34J of the socket 303. Contact point 39D is a point where the convex corner 22N of the oil filter 201 contacts a middle portion of the inner wall portion 34L of the socket 303.

[0115] The configuration of the socket 304 will be described with reference to FIG.

[0116] Socket 304 has thirteen inner wall regions 34 consisting of inner wall region 34A through inner wall region 34M. Furthermore, socket 304 has thirteen recessed corners 35 consisting of recessed corners 35A through 35M. Moreover, inner wall regions 34 of socket 304 as a whole are symmetrical in the left-right direction and asymmetrical in the front-rear direction.

[0117] The socket 304 has a torque applying portion 36, a recessed portion 37 and an intermediate portion 38, similar to the socket 30 described above.

[0118] The torque application portion 36 has a torque application portion 36A and a torque application portion 36B that face each other in the front-rear direction. Torque is effectively transmitted from the socket 304 to the oil filter 201 at the torque application portion 36A and the torque application portion 36B.

[0119] In the torque application portion 36A, the inner wall portion 34M, the concave corner portion 35A, the inner wall portion 34A, the concave corner portion 35B and the inner wall portion 34B of the socket 304 are in close contact with the outer wall portion 23O, the convex corner portion 22A, the outer wall portion 23A, the convex corner portion 22B and the outer wall portion 23B of the oil filter 201, thereby transmitting the torque.

[0120] In torque application portion 36B, inner wall portion 34F, concave corner portion 35G, inner wall portion 34G, concave corner portion 35H, inner wall portion 34H, concave corner portion 35I and inner wall portion 34I of socket 304 come into close contact with outer wall portion 23G, convex corner portion 22H, outer wall portion 23H, convex corner portion 22I, outer wall portion 23I, convex corner portion 22J and outer wall portion 23J of oil filter 201, and transmit torque.

[0121] The recess 37 has a recess 37A and a recess 37B that face each other in the left-right direction.

[0122] At the relief portion 37A, the inner wall portion 34K of the socket 304 is spaced apart from the outer wall portion 23L, the convex corner portion 22M, and the outer wall portion 23M of the oil filter 201. At the relief portion 37B, the inner wall portion 34D of the socket 304 is spaced apart from the outer wall portion 23D, the convex corner portion 22E, and the outer wall portion 23E of the oil filter 201. Therefore, even if the shape of the oil filter 201 differs from the design value due to unevenness in the paint covering the surface of the oil filter 201, etc., the relief portions 37A and 37B function as buffer regions to suppress paint peeling, etc.

[0123] Intermediate portion 38 has intermediate portion 38A, intermediate portion 38B, intermediate portion 38C and intermediate portion 38D.

[0124] The left side portion of inner wall portion 34C constituting intermediate portion 38A abuts against outer wall portion 23C of oil filter 201, and transmits torque to oil filter 201. On the other hand, the right side portion of outer wall portion 23C does not abut against outer wall portion 23C.

[0125] The left side portion of inner wall portion 34E constituting intermediate portion 38B abuts against outer wall portion 23F of oil filter 201 to transmit torque to oil filter 201. On the other hand, the right side portion of inner wall portion 34E does not abut against outer wall portion 23F.

[0126] The right side portion of inner wall portion 34J constituting intermediate portion 38C abuts against outer wall portion 23K of oil filter 201 to transmit torque to oil filter 201. On the other hand, the left side portion of inner wall portion 34J does not abut against outer wall portion 23K.

[0127] The right side portion of inner wall portion 34L constituting intermediate portion 38D abuts against outer wall portion 23N of oil filter 201 to transmit torque to oil filter 201. On the other hand, the left side portion of inner wall portion 34L does not abut against outer wall portion 23N.

[0128] As a result of the above, torque is transmitted from socket 304 to oil filter 201 by each wall portion constituting torque application portion 36 and intermediate portion 38. Specifically, torque is transmitted from socket 304 to oil filter 201 by inner wall portion 34A, inner wall portion 34B, a portion of inner wall portion 34C, a portion of inner wall portion 34E, inner wall portion 34F, inner wall portion 34G, inner wall portion 34H, inner wall portion 34I, a portion of inner wall portion 34J, a portion of inner wall portion 34L, and inner wall portion 34M of socket 304.

[0129] The contact point 39 is the location where the convex corner 22 of the oil filter 201 and the inner wall portion 34 of the socket 304 come into contact with each other.

[0130] Specifically, the contact points 39 include contact points 39A, 39B, 39C, and 39D. The contact point 39A is a point where the convex corner 22D of the oil filter 201 contacts a middle portion of the inner wall portion 34C of the socket 304. The contact point 39B is a point where the convex corner 22F of the oil filter 201 contacts a middle portion of the inner wall portion 34E of the socket 304. The contact point 39C is a point where the convex corner 22L of the oil filter 201 contacts a middle portion of the inner wall portion 34J of the socket 304. The contact point 39D is a point where the convex corner 22N of the oil filter 201 contacts a middle portion of the inner wall portion 34L of the socket 304.

[0131] The technical ideas that can be understood from the above-described embodiment will be described below together with their effects.

[0132] A socket according to an embodiment of the present invention is a socket that is attached to the head of an oil filter when the oil filter is removed and includes a bottom surface portion having a substantially plate-like shape and a side wall portion that is continuous with the peripheral portion of the bottom surface portion and has a substantially cylindrical shape, the inner wall of the side wall portion has a concave corner portion that is recessed in a shape corresponding to the convex corner portion of the oil filter and an inner wall portion that connects the concave corner portions, the inner wall portion constitutes a torque application portion and a relief portion, the torque application portions are arranged to face each other across the center of the bottom surface portion and are configured to apply torque to the oil filter when the oil filter is removed and the relief portions are arranged to face each other across the center of the bottom surface portion in a direction perpendicular to the direction in which the torque application portions face each other and are configured not to come into contact with the oil filter when the oil filter is removed and installed. According to the socket of the present invention, even if the head shape of the oil filter is not a regular polygonal shape to be precise, the torque application portion can reliably apply torque to the oil filter. Furthermore, the recess absorbs irregular parts and prevents the paint coating the surface of the oil filter from peeling off.

[0133] In addition, in the socket according to one embodiment of the present invention, the distance between the recesses is longer than the distance between the torque application portions. According to the socket of the present invention, the recesses can reliably separate the convex corners of the oil filter from the inner wall portion of the socket, thereby achieving a remarkable effect of suppressing peeling of paint, etc.

[0134] In a socket according to one embodiment of the present invention, the head of the oil filter has a tetragonal shape, the torque applying portion has a first torque applying portion and a second torque applying portion, the second torque applying portion is disposed at a position 180 degrees symmetrical with respect to the first torque applying portion with respect to the center of the bottom portion, the first torque applying portion has two of the inner wall portions, and the second torque applying portion has another two of the inner wall portions. According to the socket of the present invention, when the head of the oil filter has a tetragonal shape, torque can be effectively transmitted from the socket to the oil filter at the first torque applying portion and the second torque applying portion.

[0135] In a socket according to one embodiment of the present invention, the head of the oil filter has a pentagonal shape, the torque applying portion has a first torque applying portion and a second torque applying portion, the second torque applying portion is disposed at a position 180 degrees symmetrical with respect to the first torque applying portion with respect to the center of the bottom portion, the first torque applying portion has two to four of the inner wall portions, and the second torque applying portion has three to four of the inner wall portions. According to the socket of the present invention, even when the head of the oil filter has a pentagonal shape, the first torque applying portion and the second torque applying portion can effectively transmit torque from the socket to the oil filter.

[0136] Moreover, a socket according to one embodiment of the present invention is a socket that is attached to the head of an oil filter when removing or installing the oil filter, and has a bottom surface portion that is generally plate-shaped, and a side wall portion that is continuous with a peripheral portion of the bottom surface portion and is generally cylindrical, and an inner wall of the side wall portion has concave corners that are recessed in a shape corresponding to convex corners of the oil filter, and an inner wall portion that connects the concave corners, and the inner wall portion constitutes a torque application portion, a relief portion, and an intermediate portion, and the torque application portion is configured to apply torque to the oil filter when removing or installing the oil filter, the relief portion is configured not to come into contact with the oil filter when removing or installing the oil filter, and the intermediate portion is disposed between the torque application portion and the relief portion, and is configured to partially apply torque to the oil filter when removing or installing the oil filter. According to the socket of the present invention, even if the head shape of the oil filter is not strictly a regular polygon, the middle portion partially applies torque to the oil filter when removing or attaching it, thereby absorbing the irregular portion and preventing the paint covering the surface of the oil filter from peeling off.

[0137] In addition, in the socket according to one embodiment of the present invention, the length of the inner wall portion of the socket along the circumferential direction is longer than the length of the outer wall portion of the oil filter along the circumferential direction in the intermediate portion. According to the socket of the present invention, by making the inner wall portion longer in the intermediate portion, the inner wall portion of the socket can be separated from the outer wall portion of the oil filter in the relief portion. In addition, in the intermediate portion, the convex corner portion of the oil filter is abutted against the middle portion of the inner wall portion of the socket, and the abutment portion allows the wear of the socket to be confirmed.

[0138] In addition, in a socket according to an embodiment of the present invention, the intermediate portion is disposed on both ends of the torque applying portion in the circumferential direction. According to the socket of the present invention, the intermediate portion functions as a buffer region and can mitigate unevenness in torque caused by uneven coating thickness or the like.

[0139] Although the embodiment of the present invention has been described above, the present invention is not limited to this embodiment, and modifications can be made without departing from the scope of the present invention. In addition, the above-described embodiments can be combined with each other. [Explanation of symbols]

[0140] 10 Vehicles 11 Engine 20 Oil Filter 201 Oil filter 21 Head 22 Convex corner 22A Convex corner 22B Convex corner 22C Convex corner 22D convex corner 22E Convex corner 22F convex corner 22G convex corner 22H Convex corner 22I Convex corner 22J Convex corner 22K convex corner 22L convex corner 22M convex corner 22N convex corner 22O convex corner 23 Exterior wall part 23A External wall part 23B External wall part 23C External wall part 23D External wall part 23E External wall part 23F External wall part 23G External wall part 23H External wall part 23I External wall part 23J External wall part 23K External wall part 23L External wall part 23M External wall part 23N External wall part 23O External wall part 24 Container section 25 center 30 Sockets 301 Socket 302 Socket 303 Socket 304 Socket 31 Bottom part 32 Side wall 33 Inner wall 34 Inner wall area 34A Inner wall part 34B Inner wall part 34C Inner wall part 34D Inner wall part 34E Inner wall part 34F inner wall part 34G Inner wall part 34H Inner wall part 34I Inner wall area 34J Inner wall part 34K inner wall part 34L inner wall part 34M inner wall part 35 Concave corner 35A concave corner 35B Concave corner 35C concave corner 35D concave corner 35E concave corner 35F concave corner 35G concave corner 35H concave corner 35I concave corner 35J concave corner 35K concave corner 35L concave corner 35M concave corner 36 Torque applying section 36A Torque applying part 36B Torque applying part 37 Relief 37A Relief 37B Relief 38 Middle Section 38A Middle part 38B Middle part 38C middle part 38D middle section 39 contact points 39A contact point 39B Contact point 39C Contact Point 39D contact point

Claims

1. A socket that is attached to the head of the oil filter when removing or installing the oil filter. The container has a bottom surface portion having a generally plate-like shape, and a side wall portion that is continuous with a peripheral portion of the bottom surface portion and has a generally cylindrical shape, The inner wall of the side wall portion has a concave corner portion that is recessed into a shape corresponding to the convex corner portion of the oil filter, and an inner wall portion that connects the concave corner portions, The inner wall portion constitutes a torque applying portion and a relief portion, The torque application portions are disposed opposite each other across the center of the bottom surface portion and are configured to apply a torque to the oil filter when performing the installation and removal, the recesses are arranged opposite each other across the center of the bottom surface portion in a direction perpendicular to the direction in which the torque application portions face each other, and are configured not to come into contact with the oil filter when the socket is removed or attached.

2. 2. The socket according to claim 1, wherein a distance between said recesses is longer than a distance between said torque application portions.

3. The head of the oil filter has a 14-sided shape, The torque applying portion includes a first torque applying portion and a second torque applying portion, the second torque application portion is disposed at a position 180 degrees symmetrical with respect to the first torque application portion with respect to the center of the bottom surface portion, the first torque applying portion has two of the inner wall portions, 2. The socket of claim 1, wherein the second torque applying portion has two other of the inner wall portions.

4. The head of the oil filter has a 15-sided shape, The torque applying portion includes a first torque applying portion and a second torque applying portion, the second torque application portion is disposed at a position 180 degrees symmetrical with respect to the first torque application portion with respect to the center of the bottom surface portion, the first torque applying portion has two or more and four or less of the inner wall portions, 2. The socket according to claim 1, wherein the second torque applying portion has three to four of the inner wall portions.

5. A socket that is attached to the head of the oil filter when removing or installing the oil filter. The container has a bottom surface portion having a generally plate-like shape, and a side wall portion that is continuous with a peripheral portion of the bottom surface portion and has a generally cylindrical shape, The inner wall of the side wall portion has a concave corner portion that is recessed into a shape corresponding to the convex corner portion of the oil filter, and an inner wall portion that connects the concave corner portions, The inner wall portion includes a torque applying portion, a relief portion, and an intermediate portion, The torque application unit is configured to apply a torque to the oil filter when performing the installation and removal, The recess is configured not to come into contact with the oil filter when the oil filter is attached or detached. the intermediate portion is disposed between the torque application portion and the recess, and is configured to partially apply torque to the oil filter when the oil filter is being removed or attached.

6. 6. The socket according to claim 5, wherein, at the intermediate portion, a length along a circumferential direction of the inner wall portion of the socket is longer than a length along a circumferential direction of an outer wall portion of the oil filter.

7. 6. The socket according to claim 5, wherein the intermediate portion is disposed on both ends of the torque application portion in a circumferential direction.

8. The head of the oil filter has a 14-sided shape, The torque applying portion includes a first torque applying portion and a second torque applying portion, the second torque application portion is disposed at a position 180 degrees symmetrical with respect to the first torque application portion with respect to the center of the bottom surface portion, the first torque applying portion has two of the inner wall portions, 6. The socket of claim 5, wherein the second torque applying portion has two other of the inner wall portions.

9. The head of the oil filter has a 15-sided shape, The torque applying portion includes a first torque applying portion and a second torque applying portion, the second torque application portion is disposed at a position 180 degrees symmetrical with respect to the first torque application portion with respect to the center of the bottom surface portion, the first torque applying portion has two or more and four or less of the inner wall portions, 6. The socket according to claim 5, wherein the second torque applying portion has three to four of the inner wall portions.

Images