CN116852425A - Trimming blades with profiled teeth - Google Patents

Abstract

The invention relates to a trimming blade with special-shaped teeth, which is characterized in that one side of each side tooth, which is close to a cutting tooth, is provided with a blade edge, wherein the blade edge comprises at least two line segments which are sequentially connected and extend from the opening end of a static tooth slot to the bottom of the static tooth slot, and an included angle < 1 > is formed between at least two line segments of the blade edge by taking the central axis of the static tooth slot as a reference, so that the width of an intersection point P between the opening end of the static tooth slot and the two line segments of the blade edge is narrowed. The invention has the beneficial effects that the cutting edge of the side tooth is changed from a straight line or an oblique line into at least two line segments, and an included angle 1 is formed between the two line segments, so that the distance between the cutting edge from the opening end of the static tooth slot to the intersection point P of the two line segments is narrowed from wide. The time that the hair enters the bottom of the static tooth slot is effectively delayed, the blocking effect is achieved, the time is strived for by swinging cutting of the movable cutter, the hair can be cut off by the cutting teeth of the movable cutter before entering the bottom of the static tooth slot, the hair is effectively prevented from entering the bottom of the static tooth slot, and the phenomena of napping or clamping hair are prevented.

Description

Trimming blades with profiled teeth

Technical field

The present invention relates to hair trimming components, and more specifically to a trimming blade with special-shaped teeth, which is mainly used in tools such as hair clippers, razors or shavers.

Background technique

The trimming blade is the main component of the trimming head used in hair shears, razors or shavers. The trimming blade is mainly divided into a static knife used to guide and capture hair and a moving knife that reciprocates along the static knife to cut hair. .

As shown in Figure 1, the existing static knife has a plurality of cutting teeth (2) arranged at intervals on one side of the blade body (1), and an open-shaped static tooth groove (2) is formed between the adjacent cutting teeth (2). 3), there is a side tooth (4) at the outermost ends of the blade body (1) to prevent deformation and with a wider width. The width of the side tooth (4) is larger than that of other cutting teeth (2), and the side tooth (4) 4) The side close to the cutting teeth (2) is the blade edge (5), which cooperates with the cutting teeth on the movable knife to cut off the hair that enters the stationary tooth groove (3).

Since the blade edge (5) on the existing side teeth (4) is basically a straight line or a diagonal line, when the movable knife swings unilaterally along the static knife, the side teeth (4) at one end of the static knife in the opposite swing direction are in contact with the cutting teeth. The static cogging (3) between (2) will be in a completely open state. At this time, the hair will quickly enter the groove bottom of the static tooth groove (3) without any obstacles. And because the length of the cutting teeth of the existing movable knife is shorter than the depth of the static tooth groove (3) between the adjacent cutting teeth (2) on the static knife, the hair entering the bottom of the static tooth groove (3) cannot be cut by the passive knife. Cut off by the cutting teeth, and when the movable knife reciprocates along the static knife, it is easily brought into the middle area of the static knife and stuck between the end faces of the movable knife and the static knife that fit each other, causing nap or pinching, resulting in The skin produces a pulling and painful feeling, which reduces the comfort of the trimmer head.

Contents of the invention

In order to solve the above technical problems, the present invention provides a pruning blade with special-shaped teeth. The pruning blade can greatly delay the time for hair to enter the outermost fixed tooth grooves at both ends of the static knife, and prevent the hair from entering the groove bottom of the static tooth grooves. The swing cutting of the movable knife buys time to cut the hair before entering the bottom of the static gullet, effectively preventing the hair from entering the outermost fixed gullet bottom at both ends of the static knife, preventing hair pulling or pinching, and improving the hair trimmer. Head comfort.

In order to solve the above technical problems, the technical solution adopted by the present invention is a pruning blade with special-shaped teeth, which includes a blade body. The blade body is provided with edge teeth at both ends and a plurality of spaced-apart teeth arranged between the two side teeth. Cutting teeth, an open fixed tooth groove is formed between two adjacent teeth; each side tooth has a blade edge on the side close to the cutting tooth, and the blade edge includes at least two line segments connected in sequence extending from the open end of the static tooth slot to the static tooth. The groove bottom of the groove is based on the central axis of the fixed tooth groove. At least two line segments on the edge of the blade form an included angle ∠1, so that the width of the blade edge is from the opening end of the static tooth slot to the intersection point P of the two line segments. Narrow.

Preferably, at least two line segments on the edge of the blade are straight lines, curves or a combination thereof.

Preferably, based on the central axis of the fixed tooth slot, the horizontal straight line distance between the upper vertex of the line segment near the open end of the fixed tooth slot among at least two line segments on the edge of the blade and the central axis is L1, and the intersection point of the two line segments is L1. The horizontal straight-line distance between P and the central axis is L2, where L1≥L2×(1.5～5).

Preferably, the included angle ∠1 between at least two line segments on the edge of the blade is: 180°>∠1>90°.

Preferably, the blade edge of each side tooth at least includes a first line segment and a second line segment, and the intersection point P of the first line segment and the second line segment is below the tooth tip of the cutting tooth, based on the central axis of the stationary tooth groove, The angle ∠2 between the first line segment and the central axis is greater than the angle ∠3 between the second line segment and the central axis, so that the blade edge is from the opening end of the stationary tooth groove to the intersection of the first line segment and the second line segment. From wide to narrow between points P.

Preferably, the first line segment and the second line segment are respectively straight lines, and the connections between the two ends of the first line segment and the second line segment are respectively smooth transitions.

The beneficial effect of the present invention is that the blade edge of the edge tooth is changed from a straight line or an oblique line to at least two line segments, and an included angle ∠1 is formed between the two line segments so that the blade edge extends from the opening end of the static tooth groove to the two line segments The distance between the intersection points P changes from wide to narrow. Affected by the narrowing of the width between the blade edge and the central axis of the static gullet, it can effectively delay the time for hair to enter the bottom of the static gullet, hindering the hair, and buying time for the swing cutting of the movable knife, so that the hair can be It can be cut by the cutting teeth of the passive knife before entering the bottom of the static gullet, effectively preventing hair from entering the outermost bottom of the static gullet at both ends of the static knife, preventing hair pulling or pinching, and improving the use of the hair trimming head. Comfort.

Description of the drawings

Figure 1 is a front view of an existing pruning blade

Figure 2 is a front view of a pruning blade with special-shaped teeth according to an embodiment of the present invention.

Figure 3 is an enlarged view of K in Figure 2

Figure 4 is a three-dimensional structural view of a pruning blade with special-shaped teeth according to the new embodiment of the present invention.

Figure 5 is a schematic assembly diagram of a pruning blade with special-shaped teeth according to an embodiment of the present invention.

Figure 6 is a schematic diagram of the processing of static cogging in the embodiment of the present invention.

Detailed ways

The embodiments of the present invention will be further described below in conjunction with the accompanying drawings:

As shown in Figures 1-6, the present invention is a pruning blade with special-shaped teeth. The pruning blade is actually a static blade and is stationary during operation. It requires the cooperation of a moving blade to trim hair. It includes a blade body 11. The blade body 11 is provided with side teeth 12 at both ends and a plurality of spaced-apart cutting teeth 13 arranged between the two side teeth 12. An opening is formed between the two adjacent teeth. Tooth slot 14, the two adjacent teeth refer to the side teeth 12 and the cutting teeth 13 and the cutting teeth 13 and the cutting teeth 13 are spaced apart. This distance is the static tooth slot 14, which is used to separate and capture hair. , it is convenient for the movable knife 10 to cut the hair when it swings back and forth along the end surface of the trimming blade. Each side tooth 12 has a blade edge 15 on the side close to the cutting tooth 13. The blade edge 15 cooperates with the cutting tooth 13 edge of the movable knife 10 to cut off the hair entering the stationary tooth groove 14. Since the blade edge 15 on the teeth 12 at both ends of the existing pruning blade is basically a straight line or an oblique line, when the movable knife 10 swings unilaterally along the static knife, the teeth 12 at one end of the static knife in the opposite swing direction are in contact with the cutting edge. The fixed tooth grooves 14 between the teeth 13 will be in a completely open state, and hair will quickly enter the bottom of the fixed tooth grooves 14 without any obstacles. Since the length of the cutting teeth 13 of the existing movable knife 10 is shorter than the depth of the fixed tooth grooves 14 between adjacent cutting teeth 13 on the static knife, the hair entering the bottom of the fixed tooth grooves 14 cannot be cut by the cutting teeth 13 of the passive knife 10 When the movable knife 10 reciprocates along the static knife, it is easily brought into the middle area of the static knife and stuck between the mutually fitting end surfaces of the movable knife 10 and the static knife, causing the phenomenon of pulling or pinching, resulting in The skin produces a pulling and painful sensation. In order to solve the problem that when the movable knife 10 swings unilaterally along the static knife, the static tooth groove 14 between the edge teeth 12 and the cutting teeth 13 at one end of the blade body 11 relative to the swing direction is in a completely open state, so that the hair can be moved quickly without any hindrance. Entering the groove bottom of the static tooth groove 14 may easily lead to phenomena such as hair pulling or pinching. The blade edge 15 on the edge tooth 12 includes at least two line segments connected in sequence extending from the opening end of the static tooth groove 14 to the groove of the static tooth groove 14 Bottom, with the central axis 16 of the fixed tooth slot 14 as the reference, at least two line segments of the blade edge 15 form an included angle ∠1, so that the blade edge 15 is from the opening end of the stationary gear slot 14 to the intersection point P of the two line segments. From wide to narrow. Change the blade edge 15 of the edge tooth 12 from a straight line or an oblique line to at least two line segments, and form an included angle ∠1 between the two line segments so that the blade edge 15 extends from the opening end of the stationary tooth groove 14 to the intersection of the two line segments. The distance between points P changes from wide to narrow. Affected by the narrowing of the width between the blade edge 15 and the central axis 16 of the fixed tooth groove 14, it can effectively delay the time for hair to enter the bottom of the fixed tooth groove 14, thereby hindering the hair. role. The motor of the existing razor or hair clipper rotates up to 8000 rpm. Driven by the eccentric shaft, the movable knife 10 can swing back and forth along the trimming blade more than 15000 times/minute, which prevents hair from entering the bottom of the fixed tooth groove 14. Within this time, time is bought for the swing cutting of the movable knife 10, so that the hair can be cut off by the cutting teeth 13 of the passive knife 10 before entering the groove bottom of the stationary tooth groove 14, thus preventing the hair from entering between the side teeth 12 and the cutting teeth 13. The fixed tooth grooves 14 at the bottom prevent hair pulling or pinching and improve the comfort of the hair trimming device.

In order to delay the time for hair to enter the groove of the fixed tooth groove 14 and prevent the hair from quickly entering the groove bottom of the fixed tooth groove 14, at least two line segments on the blade edge 15 can be a straight line, a curve or a combination of a straight line and a curve, as long as the two line segments The included angle is formed between the open end of the fixed tooth groove 14 and the intersection point P of the two line segments from wide to narrow, so as to prevent hair from quickly entering the bottom of the fixed tooth groove 14.

In order to delay the time for hair to enter the groove of the static tooth groove 14 and prevent the hair from quickly entering the groove bottom of the static tooth groove 14, based on the central axis 16 of the static tooth groove 14, one of the at least two line segments on the blade edge 15 is close to the static tooth groove. The horizontal straight-line distance between the upper vertex of a line segment at the open end of 14 and the central axis 16 is L1, and the horizontal straight-line distance between the intersection point P of the two line segments and the central axis 16 is L2, where L1≥L2×(1.5～5 ), L1 is preferably 3 times of L2. The greater the difference between L1 and L2, the narrower the width between the intersection point P of the two line segments and the central axis 16 of the static cogging 14, the more effective the delay will be. The time for hair to enter the fixed tooth groove 14 grooves and the purpose of hindering the hair from quickly entering the bottom of the fixed tooth groove 14 grooves. Of course, if the difference between L1 and L2 is too large, for example, more than 5 times, although it can delay the hair and prevent the hair from entering the bottom of the fixed tooth groove 14, it will also affect the normal hair capturing and trimming accordingly. Therefore, L1 is 3 times of L2 as the optimal implementation. On the contrary, when the difference between L1 and L2 is too small, for example, less than 1.5 times, it means that the width between the intersection point P of the open end of the static cogging 14 and the two line segments and the central axis 16 of the static cogging 14 The change is relatively gentle and cannot delay the time for the hair to enter the fixed tooth groove 14, let alone prevent the hair from entering the bottom of the fixed tooth groove 14. Therefore, the implementation of this embodiment is a preferred implementation.

In order to delay the time for hair to enter the groove of the static tooth groove 14 and prevent the hair from quickly entering the groove bottom of the static tooth groove 14, the angle ∠1 between at least two line segments on the blade edge 15 has an angle range of: 180°>∠ 1 > 90°, preferably 160°. Theoretically, as long as the two line segments form an included angle ∠1, the blade edge 15 of the edge tooth 12 can play a certain role in delaying and hindering hair. The length of time that delays hair from entering the bottom of the fixed tooth groove 14 depends on the change in the size of the included angle ∠1. When the included angle ∠1 is larger, such as 175°, the blade edge 15 is close to a straight line or an oblique line, and the width change of L1 and L2 is relatively gentle, which delays and hinders the hair from entering the bottom of the static tooth groove 14. Relatively limited and unable to achieve the intended purpose. When the included angle is set too small, such as 100°, although the width changes of L1 and L2 are sharply narrowed, it can better delay and hinder, which not only affects normal hair trimming; at the same time, it will also Reduce the width of the teeth 12. The edge teeth 12 are too narrow. When the pruning blade is used, the strength of the side of the pruning blade where the edge teeth 12 and the cutting teeth 13 are set will be reduced accordingly, which cannot prevent the deformation of the pruning blade and affects the performance of the pruning blade. Therefore , the implementation of this embodiment is a preferred implementation.

In order to delay the time for hair to enter the groove of the fixed tooth groove 14 and prevent the hair from quickly entering the groove bottom of the fixed tooth groove 14, the blade edge 15 of each side tooth 12 at least includes a first line segment 17 and a second line segment 18. The first line segment The intersection point P of 17 and the second line segment 18 is below the tooth tip of the cutting tooth 13. After the movable knife 10 and the pruning blade (i.e., the static knife) are assembled to form an end face fit, the intersection point P must also be at the cutting tooth of the movable knife 10. 13 below. When the trimming blade is working, after the hair enters the fixed tooth groove 14, it is affected by the narrowing of the width at the intersection point P of the first line segment 17 and the second line segment 18, which delays the time for the hair to enter the bottom of the groove, and the intersection point P also correspondingly It plays the role of hindering the hair, so that the 10 movable knives can cut the hair before the hair enters the bottom of the fixed tooth groove 14, and prevents the hair from entering the bottom of the fixed tooth groove 14, thereby preventing hair pulling or hair clipping. In the actual production process of the pruning blade, the second line segment 18 on the blade edge 15 of the edge tooth 12 and the line segment connecting the bottom of the fixed tooth groove 14 are naturally formed when the grinding wheel 19 rotates to cut the fixed tooth groove 14, and are different from the grinding wheel 19 The outer shape is the same, and the shape from the second line segment 18 to the open end of the fixed tooth groove 14 is formed by secondary processing. The secondary processing can be cut by the grinding wheel 19, turned, milled and other machining equipment. Since the static cogging 14 is formed by the rotational cutting of the grinding wheel 19, in order to facilitate the exit of the static cogging 14 after the grinding wheel 19 rotates and cuts the static cogging, the thickness of the edge of the grinding wheel 19 will be smaller than the thickness of the center area of the grinding wheel 19. Therefore, the static cogging is Taking the central axis 16 of 14 as the reference, a certain included angle ∠3 will be formed between the second line segment 18 and the central axis 16, and the included angle ∠3 shall be based on the actual size of the grinding wheel 19. In order to make the blade edge 15 of the edge tooth 12 have a certain effect of delaying and hindering hair, taking the central axis 16 of the stationary tooth groove 14 as a reference, the angle ∠2 between the first line segment 17 and the central axis 16 is greater than the first line segment 17 and the central axis 16. The angle ∠3 between the second line segment 18 and the central axis 16 causes the blade edge 15 to change from wide to narrow from the open end of the stationary tooth groove 14 to the intersection point P of the first line segment 17 and the second line segment 18 .

In order to reduce the processing difficulty of the blade edge 15 of the edge tooth 12 and reduce the production cost, the first line segment 17 and the second line segment 18 are straight lines respectively, and the straight lines are oblique straight lines, and both of the first line segment 17 and the second line segment 18 are The end connections have smooth transitions. Since the static tooth groove 14 is cut and formed by the rotation of the grinding wheel 19, the second line segment 18 has the same outer shape as the oblique straight line of the grinding wheel 19, which avoids the separate processing of the second line segment 18 and reduces the processing difficulty of the blade edge 15 of the edge tooth 12. ; Moreover, oblique straight lines can also be used to facilitate the withdrawal of the grinding wheel 19 after rotating and cutting to form the static cogging 14 . The choice of an oblique straight line for the first line segment 17 and the second line segment 18 is also due to the convenience of processing. Straight lines or oblique straight lines are easier to process than curves. Therefore, a straight line or a diagonal straight line is a preferred embodiment of the first line segment 17 and the second line segment 18 . If the two ends of the first line segment 17 and the second line segment 18 are connected with a smooth transition, the blade edge 15 of the edge tooth 12 will look smoother and the overall aesthetics of the pruning blade will be improved.

The above embodiments should not be regarded as limitations of the present invention, but any improvements based on the spirit of the present invention should be within the protection scope of the present invention.

Claims (6)

1. The trimming blade with the special-shaped teeth comprises a blade body (11), wherein the blade body (11) is provided with side teeth (12) at two end edges and a plurality of cutting teeth (13) arranged between the two side teeth (12) at intervals, and an open static tooth slot (14) is formed between two adjacent teeth; the cutting tooth is characterized in that one side of each edge tooth (12) close to the cutting tooth (13) is provided with a cutting edge (15), the cutting edge (15) comprises at least two line segments which are sequentially connected and extend from the opening end of the static tooth groove (14) to the groove bottom of the static tooth groove (14), an included angle 1 is formed between at least two line segments of the cutting edge (15) by taking the central axis (16) of the static tooth groove (14) as a reference, and the cutting edge (15) is narrowed from the opening end of the static tooth groove (14) to an intersection point P of the two line segments.

2. Trimming blade with profiled teeth according to claim 1, characterized in that at least two line segments on the cutting edge (15) are straight, curved or a combination thereof.

3. The trimming blade with special-shaped teeth according to claim 1, wherein the horizontal straight line distance between the upper vertex of one line segment, which is close to the opening end of the static tooth slot (14), of at least two line segments on the cutting edge (15) and the central axis (16) is L1, and the horizontal straight line distance between the intersection point P of the two line segments and the central axis (16) is L2, wherein L1 is equal to or greater than L2× (1.5-5), based on the central axis (16) of the static tooth slot (14).

4. Trimming blade with profiled teeth according to claim 1, characterized in that the angle 1 between at least two line segments on the edge (15) is in the range: 180 DEG > < 1 > 90 deg.

5. Trimming blade with profiled teeth according to any of the claims 1-4, characterized in that the cutting edge (15) of each tooth (12) comprises at least a first line segment (17) and a second line segment (18), the intersection point P of the first line segment (17) and the second line segment (18) being below the tooth tip of the cutting tooth (13), the angle ∈2 between the first line segment (17) and the central axis (16) being larger than the angle ∈3 between the second line segment (18) and the central axis (16) with respect to the central axis (16) of the static tooth slot (14), so that the cutting edge (15) narrows from wide between the open end of the static tooth slot (14) to the intersection point P of the first line segment (17) and the second line segment (18).

6. The trimming blade with special-shaped teeth according to claim 5, wherein the first line segment (17) and the second line segment (18) are respectively straight lines, and the connection parts of the two ends of the first line segment (17) and the second line segment (18) are respectively smooth transition.