Battery Post Terminal Assembly

Abstract

The present invention inhibits a battery post terminal from being deformed more than necessary.　A battery post terminal assembly (1) comprises: a battery post terminal (10) having a gripping portion (21) that can grip a battery post at the inside thereof, and tightening portions (31) arranged in a pair so as to extend from ends of the gripping portion; a holder (40) arranged at one side of the tightening portions (31); and a base member (50) arranged opposite the holder (40) with the tightening portions (31) interposed therebetween. The base member (50) has: a pedestal (52); a threaded shaft (51) that is provided on one surface of the pedestal (52) and that connects to the holder (40); and projecting portions (54) that are provided on the surface of the pedestal (52) having the threaded shaft (51) and that project to the inside of the tightening portions (31) when a connection with the holder (40) has been made.

Description

[Technical Field]

[0001] The present invention relates to a battery post terminal assembly. [Background technology]

[0002] Generally, batteries mounted on vehicles such as automobiles have battery posts that protrude from their upper surfaces, and battery post terminals are fixed to the battery posts. Harnesses for supplying power are connected to these battery post terminals. One structure for fixing battery post terminals to battery posts has a base member formed with tapered sidewall surfaces that are inclined relative to the screw axis, and a fastening portion formed with an inclined surface oriented in a direction corresponding to the tapered sidewall surfaces (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2017-142993 Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the battery post terminal assembly, the base member may be tightened to a torque exceeding the specified value, or tightened with anti-rust oil adhering between the base member and the nut.

[0005] Therefore, it is necessary to further suppress deformation during fastening compared to conventional battery post terminal assemblies.

[0006] The present invention has been made in consideration of the above-mentioned problems, and has an object to provide a battery post terminal assembly that can suppress deformation of the battery post terminal. [Means for solving the problem]

[0007] A battery post terminal assembly according to a representative embodiment of the present invention comprises a battery post terminal having a gripping portion capable of gripping a battery post from the inside and a pair of fastening portions arranged to extend from the end of the gripping portion, a holder arranged on one side of the fastening portion, and a base member arranged on the opposite side of the holder across the fastening portion, wherein the base member has a base portion, a screw shaft provided on one surface of the base portion and connecting to the holder, and a protrusion provided on the surface of the base portion having the screw shaft and protruding inward of the fastening portion when connected to the holder.

[0008] In the battery post terminal assembly, the protruding portion contacts at least a portion of the inside of the recess of the fastening portion when the holder and the base member are connected.

[0009] In the battery post terminal assembly, the protruding portion has a first side wall portion that contacts at least a portion of the inside of the recess of the fastening portion when the holder and the base member are connected.

[0010] In the battery post terminal assembly, the tightening portion contacts the protrusion portion or the first side wall portion by tightening the holder onto the screw shaft, and the protrusion portion prevents the tightening portion from deforming radially outward from the screw shaft.

[0011] In the battery post terminal assembly, a plurality of the protruding portions are provided on the surface of the screw shaft of the base portion.

[0012] In the battery post terminal assembly, the protrusions are arranged in pairs around the screw axis.

[0013] In the battery post terminal assembly, the protruding portion has a stepped shape that contacts the screw shaft.

[0014] In the battery post terminal assembly, the base member has a second sidewall portion that contacts at least a portion of the outer side of the fastening portion when the holder and the base member are connected. [Effects of the Invention]

[0015] According to the battery post terminal assembly of the present invention, it is possible to provide a battery post terminal assembly that can suppress deformation of the battery post terminal. [Brief explanation of the drawings]

[0016] [Figure 1] FIG. 2 is an exploded perspective view of the battery post terminal assembly according to the embodiment. [Figure 2] 1 is a perspective view showing a state in which a battery post terminal and a base member of a battery post terminal assembly according to an embodiment are in contact with each other; [Figure 3] FIG. 2 is a perspective view showing a base member of the battery post terminal assembly according to the embodiment. [Figure 4] 10 is a schematic diagram showing a state in which the battery post terminal and the base member of the battery post terminal assembly according to the embodiment are in contact with each other. FIG. [Figure 5] FIG. 10 is a perspective view showing a base member of a battery post terminal assembly according to a first modified example of the embodiment. [Figure 6] FIG. 10 is an exploded perspective view of a battery post terminal assembly according to a second modified example of the embodiment. [Figure 7] FIG. 10 is a perspective view showing a state in which the battery post terminal and the base member of the battery post terminal assembly according to Modification 2 are in contact with each other. [Figure 8] FIG. 10 is a perspective view showing a base member of a battery post terminal assembly according to Modification 2. DETAILED DESCRIPTION OF THE INVENTION

[0017] A battery post terminal assembly 1 according to an embodiment of the present invention will now be described with reference to the drawings.

[0018] Fig. 1 is an exploded perspective view of a battery post terminal assembly 1 according to an embodiment. As shown in Fig. 1, the battery post terminal assembly 1 includes a battery post terminal 10 having a gripping portion 21 capable of gripping a battery post from the inside thereof and a pair of fastening portions 31 extending from the end of the gripping portion, a holder 40 disposed on one side of the fastening portion 31, and a base member 50 disposed on the opposite side of the holder 40 across the fastening portion 31. The base member 50 includes a pedestal portion 52, a threaded shaft 51 provided on one surface of the pedestal portion 52 and coupled to the holder 40, and an overhanging portion 54 provided on the surface of the pedestal portion 52 having the threaded shaft 51 and overhanging inward of the fastening portion 31 when coupled to the holder 40. The battery post terminal assembly 1 will be described in detail below.

[0019] For ease of explanation, the direction along the side surface of the battery post terminal 10 in the battery post terminal assembly 1 in FIG. 1 is referred to as the z-axis direction, i.e., the direction parallel to the axis z1 of the screw shaft 51 of the base member 50 with which the battery post terminal 10 engages (hereinafter also referred to as the axial direction). The axis z1 direction is also referred to as the up-down direction. One of the directions perpendicular to the axis z1 of the battery post terminal assembly 1 (the x-axis direction) is referred to as the left-right direction. The x-axis direction is also the horizontal direction in the battery post terminal assembly 1. The other direction perpendicular to the axis z1 of the battery post terminal assembly 1 (the y-axis direction) is referred to as the front-to-rear direction. In the battery post terminal assembly 1, the -y direction is also referred to as the front side, and the +y direction is also referred to as the rear side. In the battery post terminal assembly 1, the direction perpendicular to the axis z1 of the screw shaft 51 is also referred to as the radial direction of the screw shaft 51. Furthermore, in the battery post terminal assembly 1, the direction viewed from the -y direction toward the +y direction is referred to as the front direction. In the following description, when the positional relationship and direction of each component are described as right side, left side, front side, rear side, top side, and bottom side, these refer only to the positional relationship and direction in the drawings and do not limit the positional relationship and direction in the actual battery post terminal assembly.

[0020] As shown in FIG. 1, the battery post terminal assembly 1 is configured by assembling a battery post terminal 10 and a holder 40 by fastening them together in the vertical direction using a base member 50 and a nut 60 as a fastening member.

[0021] Fig. 2 is a perspective view showing a state in which the battery post terminals 10 of the battery post terminal assembly 1 are in contact with the base member 50. Fig. 3 is a perspective view showing the base member 50 of the battery post terminal assembly 1.

[0022] 1 to 3, the battery post terminal 10 is made of a conductive metal material. The battery post terminal 10 is integrally formed with a connection portion 11 located at the back in Fig. 1, a grip portion 21 located in front of the connection portion 11, and a fastening portion 31 located further in front of the grip portion 21.

[0023] The connection part 11 is incorporated into the case of a detection sensor of a battery state detection device (not shown). A harness for an electrical component (not shown) is attached in a manner that the detection sensor is interposed therebetween. The shape of the connection part 11 is formed arbitrarily to match the mounting structure within the detection sensor. The connection part 11 also functions as a structural member that supports the detection sensor.

[0024] The gripping portion 21 secures the battery post terminal 10 to a battery post (not shown). The gripping portion 21 is annular, or arc-shaped, with a truncated cone-shaped insertion space inside to match the shape of the battery post. The insertion space is configured to allow a truncated cone-shaped battery post (not shown) to be inserted. In the following description, the central axis of the truncated cone-shaped insertion space may be referred to as the insertion axis. The inner peripheral surface 22 of the gripping portion 21 is inclined to make surface contact with the inclined outer peripheral surface of the battery post. The inner peripheral surface 22 also has multiple grooves 24 spaced apart circumferentially. The grooves 24 are formed approximately along the insertion axis. The grooves 24 increase the clamping force of the gripping portion 21 when clamping the outer peripheral surface of the battery post. The gripping portion 21 is attached to the upper side of the battery post so that it covers the inner peripheral surface 22.

[0025] Furthermore, the gripping portion 21 is formed integrally and continuously with the connecting portion 11 at the rear side, but at the front side, it is branched (divided) into left and right parts across the inner peripheral surface 22. The tightening portions 31 are formed as a pair so as to extend forward from the tips of the gripping portion 21 that are branched into left and right parts.

[0026] Specifically, the fastening portion 31 is composed of a left extension portion 32 extending forward from the left side of the gripping portion 21, and a right extension portion 32 extending forward from the right tip portion 23, with spaces provided on both sides between the left extension portion 32 and its inner circumferential surface 321, across the axis z1 of the base member 50. A space is formed between the pair of extension portions 32, and by moving the extension portions 32 toward each other, the gripping portion 21 is deformed so that the diameter of the insertion space decreases, thereby enabling the battery post to be fastened and gripped. Note that the fastening portion 31 has a shape symmetrical left and right sides across the axis z1, and unless otherwise noted, the following description will only describe the structure of the left side of the fastening portion 31, omitting the structure of the right side.

[0027] The extension portion 32 has an inclined surface 34 formed thereon, which slopes upward to the right or left as it approaches the axis z1 from bottom to top when viewed from the front side. Furthermore, a boss portion 35 that widens in a generally U-shape from the inside to the outside is formed at the center upper portion of the inclined surface 34 in the front-to-rear direction, as shown in FIG. 1. The position of the boss portion 35 corresponds to the position where the screw shaft 51 is inserted when the base member 50 is attached, as shown in FIG. 2. Furthermore, the boss portion 35 is formed to protrude outward between the adjacent leg portions 42 when the holder 40 is assembled to the fastening portion 31.

[0028] The extension section 32 is elastic and can move elastically left and right with the portion at the back of the grip section 21 as its base end. A bent section 33 is formed at the front tip of the right extension section 32, with the end section 36 bent at a substantially right angle toward the left. The end section 36 of the bent section 33 extends to a position close to the end of the inclined surface 34 on the front side of the left extension section 32. The bent section 33 is bent so that its length in the left-right direction covers the inner circumferential surface 321 on the inside of the extension section 32 from the front side.

[0029] As shown in FIG. 1 , the holder 40 is attached by covering the fastening portion 31 of the battery post terminal 10 from above. The holder 40 has a generally rectangular top surface 41, four legs 42 extending downward from each of the four corners of the top surface 41, and an insertion hole 411 provided in the center of the top surface 41. The sides of the top surface 41 are shorter in the front-to-rear direction than in the left-to-right direction. A screw shaft 51 of a base member 50 (described below) is inserted into the insertion hole 411. The four legs 42 are arranged symmetrically in the front-to-rear and left-to-right directions around the insertion hole 411, and the spacing between the legs 42 in the front-to-rear direction is narrower than the spacing between the legs in the left-to-right direction. The top surface of the top surface 41 is flat so that a nut 60 can be stably fastened.

[0030] Slopes 421 are formed on the left and right inner sides of the leg portion 42. These slopes 421 are formed at the same inclination angle as the inclined surfaces 34 of the left and right extension portions 32, and when the holder 40 is assembled to the tightening portion 31, the inclined surfaces 34 and the slopes 421 come into surface contact with each other.

[0031] The lower ends of the legs 42 are designed to abut against the upper surface of the pedestal portion 52 of the base member 50 when the nuts 60 are fully tightened. In other words, the length of the legs 42 is determined in relation to the tightening torque when the nuts 60 are tightened, and by tightening the nuts until the four legs 42 abut against each other, overtorque is prevented.

[0032] Furthermore, when the holder 40 is viewed from a vertical direction in the attached state, the legs 42 of the holder 40 are arranged at intervals along the outer periphery of the screw shaft 51, with the screw shaft 51 of the base member 50 at the center, and are arranged in a nearly evenly balanced manner so as to surround the outside of the screw shaft 51.

[0033] As shown in Figures 1 to 3, the base member 50 is composed of a screw shaft 51 extending in the vertical direction, a base portion 52 located below the screw shaft 51, and a protrusion portion 54 provided on the base portion 52.

[0034] The screw shaft 51 includes a male thread portion 511 having a thread formed over a predetermined length range from the tip portion facing upward, a step portion 513 as a restricting member that restricts movement of the holder 40, and a small diameter portion 512 provided between the male thread portion 511 and the step portion 513. In the base member 50, the small diameter portion 512 and the step portion 513 function as restricting members that restrict movement of the holder 40 in the direction of the axis z1. The base member 50 is a so-called stepped base member in which the step portion 513 without a thread is provided over a predetermined length range on the base end side of the screw shaft 51, i.e., on the pedestal portion 52 side.

[0035] The base portion 52 is, for example, a rectangular plate-like or substantially plate-like member having a surface extending in a direction perpendicular to the axis z1 (the x-axis direction and the y-axis direction). The base portion 52 has dimensions in the x-axis direction and the y-axis direction such that the lower end of the extension portion 32 of the tightening portion 31 and the lower end of the leg portion 42 of the holder 40 can come into contact with each other when the nut 60 is tightened onto the screw shaft 51. The base portion 52 is joined to the screw shaft 51 at a base end portion on the stepped portion 513 side where the male thread portion 511 of the screw shaft 51 is not provided.

[0036] The protruding portion 54 is provided on the upper surface of the base portion 52, i.e., on the surface on which the screw shaft 51 is provided. The protruding portion 54 is provided on the upper surface of the base portion 52, for example, at the joint between the base end portion of the screw shaft 51 on the step portion 513 side and the base portion 52. The protruding portion 54 is provided so as to contact the step portion 513 of the screw shaft 51. The protruding portion 54 has a step shape protruding from the base portion 52. Specifically, the protruding portion 54 protrudes upward from the base portion 52 in the z-axis direction and outward in the x-axis and y-axis directions. The surface of the protruding portion 54 on the outer side in the x-axis direction functions as a side wall portion 541. A plurality of protruding portions 54 are provided in pairs around the axis z1 of the screw shaft 51.

[0037] Next, the operation of the battery post terminal assembly 1 according to the embodiment will be described.

[0038] In the battery post terminal assembly 1, before the nuts 60 are fastened, the holder 40 is placed on the fastening portion 31. The slope 421 of the holder 40 is in surface contact with the inclined surface 34 of the fastening portion 31. The base member 50 is inserted from below the fastening portion 31, and the screw shaft 51 passes through the spaces between the inner circumferential surfaces 321 of the left and right extension portions 32 (more specifically, between the left and right boss portions 35) and is inserted into the insertion hole 411 of the holder 40 and temporarily fastened with the nuts 60.

[0039] The left-right position of the holder 40 is regulated by the contact between the slope 421 and the inclined surface 34. The front-rear position is regulated by the contact between the inner front-rear surfaces of the holder 40 and the boss portion 35 of the fastening portion 31. The front-rear position of the holder 40 is also regulated by the contact between the inner front-rear surfaces of the legs 42 and the boss portion 35. The position of the base member 50 is regulated by the contact between the outer peripheral surface of the holder 40 in the left-right direction and the upper surface of the pedestal portion 52.

[0040] 1 and 2, when the nut 60 is tightened from above the holder 40, the holder 40 moves in the direction of the axis z1, specifically in the downward -z direction (the direction in which the base member 50 is tightened), while being guided by the surface contact between the slope 421 and the inclined surface 34 on the left and right. Furthermore, the slope 421 presses the inclined surfaces 34 of the left and right extension portions 32 inward in the +x or -x direction by moving in the direction of the axis z1. As a result, the inner circumferential surfaces 321 of the left and right extension portions 32 are elastically deformed inward so as to narrow the gap between them in the left and right direction, and the battery post within the inner circumferential surface 22 of the grip portion 21 is tightened and fixed.

[0041] The inclined surface 34 and the slope 421 press the extension portion 32 while contacting each other, so that the fastening force of the nut 60 is transmitted to the extension portion 32 in a stable manner, and the extension portion 32 is pressed in a well-balanced manner.

[0042] When viewed vertically from the battery post terminal 10, the legs 42 are spaced apart along the outer periphery of the screw shaft 51, with the screw shaft 51 of the base member 50 at the center, and are arranged approximately evenly so as to surround the outside of the screw shaft 51, so that they press the left and right extensions 32 inward with approximately equal force. As a result, even if forces act from multiple directions on the screw shaft 51 after the base member 50 and nut 60 are fastened, equal fixing strength can be ensured in all directions.

[0043] In the base member 50, the holder 40 moves in the direction of the axis z1, specifically in the downward −z-axis direction, due to the male thread portion 511 of the screw shaft 51. Specifically, in the base member 50, the nut 60 threaded onto the male thread portion 511 from the tip side of the screw shaft 51 moves in the tightening direction of the male thread portion 511, i.e., in the −z1 direction, thereby pressing the top surface portion 41 of the holder 40 in contact with the nut 60, and moving the holder 40 in the direction of the axis z1. The male thread portion 511 is formed within a predetermined length range from the tip end of the screw shaft 51, and therefore the nut 60 and the holder 40 move in the direction of the axis z1 within the length range of the male thread portion 511.

[0044] When the nut 60 reaches the base end side of the male thread portion 511, i.e., the lower end, the nut 60 spins freely because the small diameter portion 512 and the stepped portion 513 of the screw shaft 51 do not have threads that can be threaded onto the nut 60. In this way, the base member 50, by forming the small diameter portion 512 and the stepped portion 513, restricts the movement of the nut 60 and the holder 40, which can move together with the nut 60, in the direction of the axis z1, specifically in the downward -z-axis direction.

[0045] FIG. 4 is a schematic diagram showing a state in which the battery post terminal 10 of the battery post terminal assembly 1 and the base member 50 are in contact with each other.

[0046] As shown in FIG. 4, when the holder 40 and the base member 50 are connected, the protruding portion 54 contacts at least a portion of the inner surface of the recessed portion (extension portion 32) of the fastening portion 31. The side wall portion 541 of the protruding portion 54 on the outer side in the x-axis direction contacts the inner surface (inner circumferential surface 321) of the extension portion 32. By providing the protruding portion 54, when the fastening portion 31 is deformed inward by fastening the holder 40 to the screw shaft 51, the inward deformation of the fastening portion 31 is suppressed. Specifically, when the nut 60 is tightened from above the holder 40 (see FIG. 1), the slope 421 of the holder 40 moves in the direction of the axis z1 as described above, thereby elastically deforming inward so as to narrow the left-right distance between the inner circumferential surfaces 321 of the left and right extension portions 32. When the inner circumferential surface 321 of the extension portion 32 elastically deforms inward, a side wall portion 541 extending in the y-axis direction of the protruding portion 54 of the base member 50 located inside the extension portion 32 comes into contact with the inner circumferential surface 321. In the battery post terminal assembly 1, the side wall portion 541 of the protruding portion 54 of the base member 50 comes into contact with the inner circumferential surface 321 of the extension portion 32, thereby suppressing deformation of the extension portion 32 and suppressing deformation of the fastening portion 31 (as a whole). Furthermore, in the battery post terminal assembly 1, when the nut 60 is fastened together with the holder 40, the end portion 542 of the side wall portion 541 of the protruding portion 54 of the base member 50 comes into contact with an inner corner portion 351 of the boss portion 35, which expands in a substantially U-shape from the inside to the outside. In the battery post terminal assembly 1, the end 542 of the protruding portion 54 comes into contact with the inner corner 351 of the boss portion 35, so that the end 542 and the corner 351 serve as restraint points when the nut 60 is tightened onto the screw shaft 51 of the base member 50. With the end 542 and the corner 351 serving as restraint points, the battery post terminal assembly 1 can suppress deformation of the extension portion 32. Specifically, with the end 542 and the corner 351 serving as restraint points, it is possible to suppress the end 36 and the bent portion 33 from opening radially outward (in the -y-axis direction) of the screw shaft 51 due to the tightening portion 31 stretching.

[0047] In the battery post terminal assembly 1 according to the embodiment of the present invention, the threaded shaft 51 of the base member 50 is provided with a small diameter portion 512 and a stepped portion 513 as restricting members that restrict movement of the holder 40, which moves together with the nut 60, in the direction of the axis z1. With the battery post terminal assembly 1 configured in this manner, even if the base member 50 is tightened with a torque exceeding the specified value, or if tightening is performed with anti-rust oil adhered between the base member 50 and the nut 60, the positions of the nut 60 and the holder 40 provided on the battery post terminal assembly 1 in the direction of the axis z1 will be lowered more than necessary, thereby preventing the battery post terminal from being deformed more than necessary.

[0048] The above describes a battery post terminal assembly 1 according to an embodiment of the present invention, but the present invention is not limited to the above-described embodiment, and various modifications and variations are possible based on the technical concept of the present invention.

[0049] FIG. 5 is a perspective view showing a base member 50A of a battery post terminal assembly 1 according to a first modified example of the embodiment.

[0050] For example, in the embodiment, the overhanging portion 54 is provided on the upper surface of the pedestal portion 52 at the joint between the base end portion of the screw shaft 51 on the step portion 513 side and the pedestal portion 52, but this is not limited thereto. For example, like the overhanging portion 54A in the base member 50A of the first modified example shown in FIG. 5, it is sufficient that the overhanging portion 54 protrudes upward in the z-axis direction from the upper surface of the pedestal portion 52A. Furthermore, it is sufficient that the overhanging portions 54, 54A protrude outward from the outer peripheral surface of the screw shaft 51 in at least one of the x-axis and y-axis directions. The overhanging portions 54, 54A may be provided at a position spaced above the pedestal portion 52, for example.

[0051] In addition, in the embodiment, the protrusions 54, 54A are arranged in pairs centered on the axis z1 of the screw shaft 51, but this is not limited to this, and for example, one protrusion may protrude outward from the screw shaft 51 in at least one of the x-axis and y-axis directions.

[0052] Fig. 6 is an exploded perspective view of a battery post terminal assembly 1 according to a second modified embodiment. Fig. 7 is a perspective view showing the battery post terminals 10 of the battery post terminal assembly 1B in contact with a base member 50B. Fig. 8 is a perspective view showing the base member 50B of the battery post terminal assembly 1B.

[0053] 6 to 8, the battery post terminal assembly 1 according to Modification 2 has a base member 50B that is different from the base member 50 of the previously described battery post terminal assembly 1. Specifically, the base member 50B has a second side wall portion 55 provided at the outer end of the pedestal portion 52B in the x-axis direction.

[0054] The second side wall portion 55 is a wall-shaped portion that rises from the outer end of the base portion 52B in the X-axis direction in the extension direction (+z-axis direction) of the screw shaft 51. When the base member 50B is assembled to the battery post, the inner surface 551 of the second side wall portion 55 contacts the outer surface of the boss portion 35. In other words, in the battery post terminal assembly 1, the inner circumferential surface 321 of the extension portion 32 of the battery post contacts the protruding portion 54, and the outer surface of the boss portion 35 contacts the second side wall portion 55, thereby further preventing the base member 50B from rotating in the tightening direction when the nut 60 is tightened. [Explanation of symbols]

[0055] 1...battery post terminal assembly, 10...battery post terminal, 11...connection portion, 21...gripping portion, 22...inner peripheral surface, 23...tip portion, 24...groove, 31...tightening portion, 32...extension portion, 33...bent portion, 34...inclined surface, 35...boss portion, 36...end portion, 40...holder, 41...top surface portion, 42...leg portion, 50, 50A, 50B...base member, 51...screw shaft, 52, 52A...pedestal portion, 54, 54A...extension portion, 55...second side wall portion, 60...nut, 321...inner peripheral surface, 411...insertion hole, 421...slope, 511...male thread portion, 512...small diameter portion, 513...step portion, 541...first side wall portion, 551...inner surface

Claims

1. a battery post terminal having a gripping portion capable of gripping a battery post therein and a pair of fastening portions arranged to extend from an end of the gripping portion; a holder disposed on one side of the fastening portion; a base member disposed on the opposite side of the holder with the fastening portion interposed therebetween; Equipped with The base member is A base portion and a screw shaft provided on one surface of the base portion and coupled to the holder; a protruding portion provided on a surface of the base portion having the screw shaft, the protruding portion protruding inward of the fastening portion when connected to the holder; the protruding portion is in contact with at least a part of the inner surface of the recessed portion of the fastening portion when the holder and the base member are connected, The protruding portion is provided in plurality on the surface of the screw shaft of the base portion, Battery post terminal assembly.

2. the protruding portion has a first sidewall portion that contacts at least a part of the inside of the recess of the fastening portion when the holder and the base member are connected.

10. The battery post terminal assembly of claim 1.

3. the fastening portion comes into contact with the protruding portion by fastening the holder to the screw shaft, The protruding portion suppresses deformation of the fastening portion radially outward of the screw shaft.

3. The battery post terminal assembly of claim 1 or 2.

4. The protrusions are arranged in pairs around the screw shaft.

10. The battery post terminal assembly of claim 1.

5. The protruding portion has a step shape that contacts the screw shaft.

10. The battery post terminal assembly of claim 1 or 4.

6. the base member has a second sidewall portion that contacts at least a part of the outer side of the fastening portion when the holder and the base member are connected.

5. The battery post terminal assembly of claim 1.

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