Door latch striker

Abstract

The present invention provides a striker that eliminates the need to attach a flange to the rod leg before inserting the rod leg into the base plate and fixing it in place by cold crimping. [Solution] The striker comprises a base plate, a pair of legs that can engage with a door latch, and a U-shaped rod having a bottom between the pair of legs. The base plate has leg fixing holes through which the legs of the rod are inserted and fixed. The inner diameter of the leg fixing holes is equal to or larger than the outer diameter of the legs. The legs of the rod are inserted from the surface side of the leg fixing holes, and the portion protruding from the back side of the leg fixing holes is cold-crimped to form a crimped portion on the back side of the base plate. On the surface side of the base plate, a flange portion is formed in a part of the leg that is larger than the inner diameter of the leg fixing holes and larger than the diameter of the leg. The crimped portion and the flange portion sandwich the base plate. The legs have a flange portion and an engaging portion that can engage with a door latch, and the engaging portion is located on the bottom side of the flange portion.

Description

Technical Field

[0001] The present invention relates to a striker for a door latch that holds a door in a closed position by engaging with a door latch provided on a door of an automobile. In particular, at the manufacturing stage, a caulking portion and a flange portion are formed on the leg portion of the rod at once, and by reducing power consumption, an effect of reducing CO2 emissions can be expected. Furthermore, it relates to a striker for a door latch that utilizes a better material in terms of improving strength and recyclability.

Background Art

[0002] Conventionally, as striker devices that engage with a latch device to maintain door closure, there are those that manufacture striker devices by inserting the end of a rod into a base plate and performing cold caulking as in Patent Document 1 and Patent Document 2. However, these require processing to provide a flange portion in advance, and there are problems not only in terms of manufacturing cost but also in reducing power consumption and CO2 emissions, that is, from the perspective of sustainable development goals (SDGs: Sustainable Development Goals). Also, there are those that do not provide a flange portion in advance as in Patent Document 3. However, since the end portion (ring region 5) of the rod is processed into a taper (frustum shape), and the hole (through hole 3) for inserting the rod of the base plate is also processed into a taper (conical shape) correspondingly, there are still problems not only in terms of manufacturing cost but also in reducing power consumption and CO2 emissions (SDGs).

[0003] Regarding reduction of power consumption, improvement of recyclability, etc., the importance of promoting activities has been recognized from the perspective of environmental consideration and sustainable development goals (SDGs). The Sustainable Development Goals (SDGs) are international goals outlined in the "2030 Agenda for Sustainable Development," adopted at the UN Summit, aiming for a sustainable and better world by 2030. The SDGs consist of 17 goals, and reducing electricity consumption is an initiative that contributes to achieving Goal 7 (Energy), "Affordable and Clean Energy." Improving recycling is an initiative that contributes to achieving Goal 12 (Sustainable Consumption and Production), "Ensure Sustainable Consumption and Production Patterns." Furthermore, since reducing electricity consumption is expected to reduce CO2 emissions, it is also considered an initiative that contributes to achieving Goal 13 (Climate Action), "Take urgent action to combat climate change and its impacts." [Prior art documents] [Patent Documents]

[0004] [Patent Document 1] Patent No. 2935812 [Patent Document 2] Chinese Patent Application Publication No. 114144562 [Patent Document 3] German Patent Application Publication No. 102016110688 [Overview of the Initiative] [Problems that the invention aims to solve]

[0005] The strikers described in Patent Documents 1 and 2 require processing to create flanges on both ends of the rod before inserting and fixing it into the base plate, and there is room for improvement in terms of reducing power consumption and CO2 emissions. In view of the above problems, the present invention aims to provide a striker that does not require flanges to be created on both ends of the rod.

[0006] In addition, striker rods are generally made of high-strength steel (chromium-molybdenum steel). Since chromium-molybdenum steel has a considerable amount of chromium and molybdenum added to the base material iron, when recycling the main component iron, chromium and molybdenum must be incorporated into the slag as impurities and removed. In order to improve iron recycling, it is desirable to keep the amount of additives low. In view of the above problems, the present invention aims to provide a high-strength steel material for rods that has a small amount of additive as an alloy component. [Means for solving the problem]

[0007] According to the present invention, the above problem is solved as follows. The first invention comprises a base plate fixed to a striker mounting surface, a pair of legs that can engage with a door latch, and a U-shaped rod having a bottom between the pair of legs. The base plate has leg fixing holes through which the legs of the rod are inserted and fixed. The inner diameter of the leg fixing hole is equal to or greater than the outer diameter of the leg. The legs of the rod are inserted through the surface side of the leg fixing hole and the portion protruding from the back side of the leg fixing hole is cold-crimped, thereby forming a crimped portion on the back side of the base plate that is larger than the inner diameter of the leg fixing hole, while on the surface side of the base plate, a flange portion is formed in a part of the leg that is larger than the inner diameter of the leg fixing hole and larger than the outer diameter of the leg, and the crimped portion and the flange portion sandwich the base plate. The leg portion has the flange portion and the engaging portion that can engage with the door latch, The striker for a door latch is characterized in that the engaging portion is located on the bottom side of the flange portion.

[0008] By simultaneously forming a crimping portion and a flange portion that function to prevent the rod's leg from coming off the base plate, while also securing an engagement portion that engages with the door latch on the rod's leg, the number of manufacturing steps for the striker 1 can be reduced, thereby lowering costs.

[0009] The second invention is a door latch striker as described in (1) above, characterized in that the leg fixing hole of the base plate is formed as a straight hole on the surface side, and the tip of the leg of the rod is formed with the same diameter all the way to the end.

[0010] Since there is no need to process the fixing holes or legs, the number of manufacturing steps for the Striker 1 can be reduced, leading to cost savings. In addition, by making the ends of the legs straight, it is easier to allow for a larger crimping allowance, which allows the rod to be firmly held to the base plate, leading to improved reliability.

[0011] The third invention is a door latch striker as described in (1) above, characterized in that the leg fixing hole of the base plate is formed as a tapered hole on the surface side, and the tip of the leg of the rod is formed with the same diameter all the way to the end.

[0012] By providing a taper to the fixing holes in the base plate, the rod is more easily guided into the holes when setting it in the jig, improving work efficiency. Furthermore, when crimped, the legs on the surface side plastically deform to follow the taper, allowing the rod to be held more firmly by the base plate, leading to further improvements in reliability.

[0013] The fourth invention is a door latch striker as described in (2) or (3) above, characterized in that a curved portion is formed between the engaging portion and the flange portion of the leg.

[0014] By incorporating a curved section, even if a load is generated as the door latch pulls on the striker, the load is distributed, allowing it to withstand the force firmly.

[0015] The fifth invention relates to the door latch striker described in (1) above, wherein the leg fixing hole has a shear surface and a fracture surface formed by shearing the base plate, It is characterized in that the thickness of the shearing cross section in the plate thickness direction of the base plate is at least 1 / 2 or more of the plate thickness of the base plate.

[0016] When the shearing cross section is thick, that is, when it is long, the adhesion between the leg portion and the shearing cross section becomes high. However, in order to make the shearing cross section long, expensive processes such as fine blanking are required, which does not lead to cost reduction. By adjusting the length of the shearing cross section to achieve appropriate adhesion, cost reduction can be achieved.

[0017] A sixth invention is the striker for a door latch described in (1) above. When forming the caulked portion and the flange portion on the leg portion by cold caulking, the die that receives the surface side of the base plate holds the engaging portion, and a space is provided near the leg portion on the surface side of the die and following the surface side of the base plate.

[0018] By providing a die with the above shape, a caulked portion and a flange portion that function to prevent the rod from coming out of the base plate can be formed at once, so the number of manufacturing processes of the striker 1 can be reduced, and cost reduction can be achieved.

Effect of the Invention

MODE FOR CARRYING OUT THE INVENTION

[0021] Hereinafter, an embodiment of the present invention will be described based on the drawings. Note that the present invention is not limited to the embodiments described below, and includes those appropriately modified by those skilled in the art within the obvious range from the following embodiments.

[0022] In the description of this specification, in the base plate 2, the surface is the side opposite to the side facing the striker mounting surface D, and the back surface is the side facing the striker mounting surface D (see FIG. 2).

[0023] As shown in FIGS. 1 and 2, the striker 1 for a door latch according to this embodiment is attached to the striker mounting surface D of an automobile body and engages with a door latch L attached to an automobile door, thereby having a function of holding the door in a closed position. The striker 1 has a base plate 2 fixed to the striker mounting surface D of the body, a pair of legs 31, 31 that can engage with the door latch L, and a rod 3 having a U-shaped cross section that connects between the pair of legs.

[0024] The base plate 2 is formed in a roughly elliptical shape in plan view. An upward bent portion 21 is formed on the surface side of the base plate 2 to which both legs 31 of the rod 3 are fixed. Between this upward bent portion 21 and the striker mounting surface D, a deformation-allowable space S is formed that opens continuously along the line connecting the ends of the pair of legs 31, 31 which are inserted through a pair of leg fixing holes 4, 4. When a tensile load is applied to the rod 3, the base plate 2 compresses the deformation-allowable space S and deforms toward the striker mounting surface D. As a result, the tensile load acting on the rod 3 is mitigated, making the rod 3 less likely to break.

[0025] The base plate 2 is fixed to the striker mounting surface D by inserting countersunk screws (not shown) through a pair of striker mounting holes 5, 5. The rod 3 is fixed to the base plate 2 by inserting the ends of a pair of legs 31, 31 of the rod 3 through a pair of leg fixing holes 4, 4 provided in the base plate 2, and by cold crimping, a pair of crimped portions 33, 33 are formed on the back side of the base plate and a pair of flange portions 37, 37 are formed on the front side of the base plate. According to the door latch striker of the present invention, the rod 3 can be fixed to the base plate after cold crimping without having to perform a process to pre-form flange portions on the front side of the base plate 2 of the rod 3, thus reducing CO2 emissions along with power consumption and lowering costs.

[0026] The base plate 2 is made of general steel materials such as SS material (rolled steel for general structural use) and SPH material (hot-rolled steel sheet), while the rod 3 is made of high-strength steel materials such as chromium-molybdenum steel (SCM material) or boron steel.

[0027] Figure 3 shows an assembly process diagram of one embodiment of a door latch striker according to the present invention. Figure 3(a) shows the base plate 2 and rod 3 that constitute the striker 1. As described above, the base plate 2 is composed of leg fixing holes 4, striker mounting holes 5, etc., and the rod 3 is composed of a pair of legs 31 and a bottom portion 32 that connects this pair of legs, etc., and the striker 1 is formed by inserting the pair of legs 31 of the rod 3 into the pair of leg fixing holes 4 provided in the base plate 2.

[0028] The pair of legs 31 of the rod 3 according to the present invention are constructed with the same outer diameter d1 throughout the entire leg portion to the tip. Therefore, the inner diameter d2 of the leg fixing hole 4 provided in the base plate 2 through which the leg portion 31 is inserted is equal to or larger than the outer diameter d1 of the leg portion. The leg fixing hole 4 is formed by shearing, such as by press working, and consists of a shear surface 41 and a fracture surface 42 which has a rougher surface than the shear surface. A taper of a predetermined angle is formed on the fracture surface 42 by the shearing process.

[0029] Figure 3(b) shows the state in which the tips of a pair of legs 31 are inserted through a pair of leg fixing holes 4. In this state, as will be described later using Figures 6 and 7, dies 51 that contact the surface of the base plate 2 and hold the outer circumference of the engaging portion 35 of the leg 31 are attached to each of the pair of legs 31. By attaching the dies 51, a flange portion 37 (see Figure 3(c)) larger than the inner diameter d2 of the leg fixing hole 4 can be provided on the surface side of the base plate 2 due to the plastic flow of the legs caused by cold crimping.

[0030] Figure 3(c) shows the striker 1 after cold crimping, in the state shown in Figure 3(b), with the tips of a pair of legs 31 inserted into a pair of leg fixing holes 4. The crimping portion 33 provided on the back side of the base plate 2 and the flange portion 37 provided on the front side of the base plate 2 clamp the base plate 2, forming a striker 1 in which the base plate 2 and the rod 3 are firmly connected. Each of the pair of legs 31 has an engaging portion 35 that engages with the door latch L to perform the function of holding the door in the closed position.

[0031] Since the leg portion 31 of the rod 3 can be secured with an engaging portion 35 that engages with the door latch L, and the crimping portion and flange portion that prevent the leg portion 31 of the rod 3 from coming off the base plate 2 can be formed at the same time, the number of manufacturing steps for the striker 1 can be reduced, and costs can be reduced.

[0032] Figure 4 shows an assembly process diagram for the door latch striker 1 according to the present invention when the leg fixing hole 4 is a straight hole. As shown in Figure 4(a), the leg fixing hole 4 is formed such that the thickness (length) l of the straight shear surface 43 is at least half the thickness t of the base plate 2, out of the straight shear surface 43 and fracture surface 44 generated during shearing. Note that the straight shear surface 43 is work hardened by shearing. A longer straight shear surface 43 increases the degree of contact between the leg 31 and the straight shear surface 43, but increasing the shear surface requires expensive processing such as fine blanking, so it does not lead to cost reduction. By adjusting the length of the straight shear surface 43 to achieve an appropriate degree of contact, it is possible to reduce costs.

[0033] As shown in Figure 4(a), the pair of legs 31 of the rod 3 according to the present invention are constructed with a uniform straight outer diameter d1 throughout the entire leg portion to the tip. Therefore, the inner diameter d2 of the leg fixing hole 4 provided in the base plate 2 through which the leg portion 31 is inserted is equal to or larger than the outer diameter d1 of the leg portion.

[0034] Figure 4(b) shows the state in which the tips of a pair of legs 31 are inserted through a pair of leg fixing holes 4. Since the tips of the legs 31 are straight, when cold crimping is performed in this state, it is easy to create a large crimping allowance, and by forming a large crimped portion 33 on the back side of the base plate 2, the rod 3 can be firmly held to the base plate 2, leading to improved reliability.

[0035] As will be described later using Figure 6, in the state shown in Figure 4(b), a die 51 is attached to each of the pair of legs 31, which is in contact with the surface of the base plate 2 and holds the outer circumference of the engaging portion 35 of the leg portion 31. By attaching the die 51, a flange portion 37 (see Figure 4(c)) having an outer diameter D1 that is larger than the inner diameter d2 of the leg portion fixing hole 4 and larger than the outer diameter d1 of the leg portion 31 can be provided on the surface side of the base plate 2 due to the plastic flow of the leg portion caused by cold crimping.

[0036] Furthermore, by attaching the die 51, as shown in Figure 4(c), a smooth curved portion R with a constant radius of curvature is formed between the flange portion 37 and the engaging portion 35 at the end of the flange portion 37 on the engaging portion side. By providing the curved portion R, even if a load is generated such that the door latch L pulls the engaging portion 35 of the striker 1, the load is distributed, and the engaging portion 35 can firmly withstand the load.

[0037] As described above, by making the leg fixing holes 4 straight holes, it is not necessary to process the leg fixing holes 4 and the leg 31, thus reducing the number of manufacturing steps for the striker 1 and lowering costs.

[0038] Figure 5 shows an assembly process diagram for the door latch striker 1 according to the present invention when the leg fixing hole 4 is a tapered hole. The leg fixing hole 4 is formed by shearing, such as by press working, and consists of a shear surface and a fracture surface which has a rougher surface than the shear surface. As shown in 5(a), the shear surface in the leg fixing hole 4 can be a tapered shear surface 45 that forms a tapered hole. Of the tapered shear surface 45 and the fracture surface 46, the thickness l of the tapered shear surface 45 is formed to be at least half the thickness t of the base plate 2.

[0039] The pair of legs 31 of the rod 3 according to the present invention are constructed with a uniform straight outer diameter d1 throughout the entire leg portion to the tip. Therefore, the inner diameter d2 of the leg fixing hole 4 provided in the base plate 2 through which the leg portion 31 is inserted is equal to or greater than the outer diameter d1 of the leg portion. A tapered edge at a predetermined angle is formed on the fracture surface 46 by the shearing process of the leg fixing hole 4. By providing a tapered edge on the shear surface of the leg fixing hole in the base plate, the legs 31 of the rod 3 are more easily guided into the leg fixing hole 4 when setting the rod 3 into the leg fixing hole 4, thereby improving work efficiency.

[0040] Figure 5(b) shows the state in which the tips of a pair of legs 31 are inserted through a pair of leg fixing holes 4. Since the tips of the legs 31 are straight, when cold crimping is performed in this state, it is easy to create a large crimping allowance, and by forming a large crimped portion 33 on the back side of the base plate 2, the rod 3 can be firmly held to the base plate 2, leading to improved reliability. Furthermore, when crimped, the legs on the front side plastically deform to follow the taper of the tapered shear surface 45, which allows the rod 3 to be held to the base plate 2 even more firmly.

[0041] As will be described later using Figure 7, in the state shown in Figure 5(b), a die 51 is attached to each of the pair of legs 31, which is in contact with the surface of the base plate 2 and holds the outer circumference of the engaging portion 35 of the leg portion 31. By attaching the die 51, a flange portion 37 (see Figure 5(c)) having an outer diameter D1 that is larger than the inner diameter d2 of the leg portion fixing hole 4 and larger than the outer diameter d1 of the leg portion 31 can be provided on the surface side of the base plate 2 due to the plastic flow of the leg portion caused by cold crimping.

[0042] Furthermore, by attaching the die 51, as shown in Figure 5(c), a smooth curved portion R with a constant radius of curvature is formed between the flange portion 37 and the engaging portion 35 at the end of the flange portion 37 on the engaging portion side. By providing the curved portion R, even if a load is generated such that the door latch L pulls the engaging portion 35 of the striker 1, the load is distributed, and the engaging portion 35 can firmly withstand the load.

[0043] Figure 6 shows a die 51 held by the engaging portion 35 of the leg portion 31 on the base plate surface side during cold riveting when the shear surface of the leg portion fixing hole is a straight hole. In the state shown in Figure 4(b), a die 51 that contacts the surface of the base plate 2 and holds the outer circumference of the leg portion 31 is attached to each of the pair of leg portions 31. By attaching the die 51, a flange portion 37 having an outer diameter D1 that is larger in diameter than the inner diameter d2 of the leg portion fixing hole 4 and larger in diameter than the outer diameter d1 of the leg portion 31 can be provided on the surface side of the base plate 2 due to the plastic flow of the leg portion caused by cold riveting.

[0044] As shown in Figure 6, a space SP of the die 51 is provided around the leg portion 31 on the surface side of the base plate 2 and in the vicinity of the surface side of the base plate 2. When cold riveting is performed with the die 51 attached as shown in Figure 4(b), the tip portion of the leg portion 31 becomes fluid due to plastic deformation and flows into the space SP around the leg portion 31, thereby forming a flange portion 37 with a large outer diameter D1. Furthermore, the die 51 has a die corner portion 51R at a distance H from the surface side of the base plate 2 along the leg portion 31, that is, at the end of the space SP. As the plastically flowed metal of the leg portion 31 flows into the space SP near this die corner portion 51R, a smooth curved portion R with a constant radius of curvature is formed. By providing the curved portion R, even if a load is generated such that the door latch L pulls the engaging portion 35 of the striker 1, the load is distributed and the engaging portion 35 can firmly withstand the load.

[0045] Similar to Figure 6, Figure 7 shows the die held by the leg portion 31 on the base plate surface side during cold riveting when the shear surface of the leg portion fixing hole is a tapered hole. As shown in Figure 7, a space SP is provided around the leg portion 31 on the surface side of the die 51 and near the surface side of the base plate 2. When cold riveting is performed with the die 51 attached as shown in Figure 5(b), the tip portion of the leg portion 31 becomes fluid due to plastic deformation and flows into the space SP around the leg portion 31, thereby forming a flange portion 37 with a large outer diameter D1. When the leg portion fixing hole 4 has a tapered shear surface 45, the adhesion of the plastically flowed metal of the leg portion 31 to the tapered shear surface 45 and fracture surface 46, and the flow into the space SP have the following characteristics.

[0046] When the tip of the leg portion 31 is plastically deformed by cold riveting, the fracture surface 46, which is softer than the tapered shear surface 45, is pressed by the riveted portion 33 and expands in diameter, forming a more tapered shape, so that the riveted portion 33 and the fracture surface 46 are in close contact. This situation is the same as the fracture surface 44 in Figure 6. On the other hand, at the tapered shear surface 45, the leg portion 31 expands in diameter along the tapered shear surface 45 toward the base plate surface due to the plastic deformation of the leg portion 31, and comes into close contact with the tapered portion of the tapered shear surface 45. Therefore, as shown in Figure 7, the leg portion 31 is firmly in contact with the tapered shear surface 45 and the fracture surface 46. Furthermore, let's compare the flange portions in Figure 6 and Figure 7. The dashed lines shown on the flange portion 37 in Figures 6 and 7 are drawn to allow for comparison of the size of the flange portion. The flange portion shown in Figure 7 is larger than the flange portion in Figure 6 because it occupies an area that covers the tapered shear surface 45. Therefore, the tapered shear surface shown in Figure 7 can hold the rod 3 more firmly to the base plate 2 than the straight shear surface 43 shown in Figure 6.

[0047] The material for rod 3 can be boron steel instead of high-strength steel such as chromium-molybdenum steel (SCM). Generally, boron steel is a type of steel to which 0.008 Wt% or more of boron and up to 0.3 Wt% of chromium are added to carbon steel. It has excellent hardenability and is characterized by higher strength compared to ordinary steel. Hardenability improves as the carbon content of the carbon steel is reduced, and the workability also improves when carbon steel with a low carbon content is used. Therefore, the annealing process can be omitted and rod 3 can be processed.

[0048] By using boron steel for Rod 3, the carbon content can be kept low, resulting in excellent cold workability, reduced power consumption, and lower costs during processing. Furthermore, the low levels of chromium and molybdenum additives contribute to improved recycling as scrap iron, and the generation of chromium and molybdenum-containing slag during the melting and refining of scrap iron is reduced, thus contributing to SDG Goal 12 (Sustainable Consumption and Production).

[0049] Therefore, this initiative can be considered a step towards achieving the SDGs goals, specifically Goal 7 (Energy) of reducing electricity consumption, Goal 12 (Sustainable Consumption and Production), and Goal 13 (Climate Change) as it is expected to reduce CO2 emissions through reduced electricity consumption.

[0050] The door latch striker according to the present invention can be applied not only to the side doors mentioned above, but also to strikers for back doors, hoods, trunk lids, and the like.

[0051] Although one embodiment of the present invention has been described above, various modifications, changes, and combinations can be made to the above embodiment without departing from the spirit of the present invention.

[0052] For example, the shape of the base plate is formed to be roughly elliptical in plan view, but the shape of the base plate is not particularly important. For example, it could be roughly circular in plan view, or roughly quadrilateral in plan view.

[0053] For example, the base plate may be made of high-strength steel in addition to general steel, depending on the vehicle's strength requirements. Using high-strength steel makes the shear surface of the leg fixing holes less prone to deformation when the legs are cold-crimped compared to when general steel is used, thus preventing the hole diameter from widening and providing an advantage in terms of strength. [Explanation of symbols]

[0054] 1. Striker 2 Base Plate 3 rods 4 Leg fixing holes 5 striker mounting holes 21 Upward bend 31 Legs 32 Bottom 33 Crimping part 35 Engaging part 37 Brim 41 Shear surface 42 Fracture surface 43 Straight shear surface 44 Fracture surface 45 Tapered shear surface 46 Fracture surface 51 Die 51R die corner D Striker mounting surface d1 Outer diameter of the leg d2 Inner diameter of leg fixing hole L Door Latch l Thickness of the shear surface R curved part S Deformation-allowable space SP space part t Base plate thickness

Claims

1. It comprises a base plate fixed to the striker mounting surface, a pair of legs that can engage with the door latch, and a U-shaped rod having a bottom between the pair of legs. The base plate has leg fixing holes through which the legs of the rod are inserted and fixed. The inner diameter of the leg fixing hole is equal to or greater than the outer diameter of the leg. The legs of the rod are inserted through the surface side of the leg fixing hole, and the portion protruding from the back side of the leg fixing hole is cold-crimped, thereby forming a crimped portion on the back side of the base plate that is larger than the inner diameter of the leg fixing hole, while on the surface side of the base plate, a flange portion is formed in a part of the leg that is larger than the inner diameter of the leg fixing hole and larger than the diameter of the leg, and the crimped portion and the flange portion sandwich the base plate. The leg portion has the flange portion and an engaging portion that can engage with the door latch. A door latch striker characterized in that the engaging portion is located on the bottom side of the flange portion.

2. The striker for a door latch according to claim 1, characterized in that the leg fixing hole of the base plate is formed as a straight hole, and the tip of the leg of the rod is formed with the same diameter to the end.

3. The striker for a door latch according to claim 1, characterized in that the leg fixing hole of the base plate is formed as a tapered hole on the surface side, and the tip of the leg of the rod is formed with the same diameter all the way to the end.

4. A door latch striker according to claim 2 or 3, characterized in that a curved portion is formed between the engaging portion and the flange portion of the leg.

5. The leg fixing hole has a shear surface and a fracture surface formed by shearing the base plate. The striker for a door latch according to claim 1, characterized in that the thickness of the shear surface in the thickness direction of the base plate is at least half or more of the thickness of the base plate.

6. The striker for a door latch according to claim 1, characterized in that when the crimped portion and the flange portion are formed on the leg portion by cold crimping, the die that receives the base plate surface side holds the engaging portion, and a space is provided on the base plate surface side of the die and near the leg portion.

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