CN209557448U - A kind of screw - Google Patents

Abstract

The utility model relates to a kind of screws, including with externally threaded screw rod and the screw terminal being wholely set with screw rod, the screw terminal is provided with the flat cross recess that bottom is a flat surface, at least one slot of the flat cross recess is by the both ends break-through of screw terminal, it is recessed inwardly centered on the crosspoint of the flat cross recess and is provided with tip cross recess, the groove width of tip cross recess is less than the groove width of flat cross recess, due to small size tip cross recess, when cooperating pointed screw knife, the torque that pointed screw knife is capable of providing it is limited, reduce when twisting pointed screw knife, destroy the probability of screw terminal.

Description

A kind of screw

Technical field

The utility model relates to field of hardware, more specifically, it relates to a kind of screw.

Background technique

Common Concave head screw on the market at present, is the combination applied to two articles or two ontologies overlap joint or fixed mode Element, but the socket screw header structure system being generally spirally connected is divided into "-" type Concave head screw or cross Concave head screw, even if Cross Concave head screw, still have difference, if any Phillips screwdriver be tip, some is tack, if not band It is very troublesome then can not to carry out turn operation to the screw for the screwdriver of upper corresponding screw terminal.

In view of the above-mentioned problems, the multipurpose screw head simultaneous with flat recess and cross recess has been had already appeared on the market, it is convenient Both it can cooperate with straight screwdriver, can also cooperate with Phillips screwdriver, and reduce and tape error screwdriver occur and can not be twisted The embarrassment of screw.

However if taking flat recess and cross recess simultaneously on screw terminal, itself intensity necessarily will affect, practical Bottle opener carries out during turning screw, is easy so that screw terminal skids, or even the phenomenon that feather plucking screw terminal occurs.

Utility model content

The purpose of the utility model is to provide a kind of structural strengths rationally and simultaneous with the screw of a word and cross concave head.

To achieve the above object, realized by following technological means: a kind of screw, including with externally threaded screw rod and The screw terminal being wholely set with screw rod, the screw terminal are provided with the flat cross recess that bottom is a flat surface, the flat cross The both ends break-through of screw terminal is recessed inwardly centered on the crosspoint of the flat cross recess and is provided with by least one slot of slot Tip cross recess, the groove width of tip cross recess are less than the groove width of flat cross recess.

It advanced optimizing are as follows: the ratio between groove depth and groove width of the flat cross recess are 0.6~0.7, and flat cross recess The diameter ratio of groove width and screw terminal is 0.15~0.16.

It advanced optimizes are as follows: the ratio between groove depth and groove width of the tip cross recess are 3: 9~3: 10.

It advanced optimizes are as follows: the trough rim of screw terminal break-through is rounded down by the flat cross recess.

It advanced optimizes are as follows: the screw terminal is a cylindrical body.

It advanced optimizes are as follows: a wherein bar groove break-through screw terminal for the flat cross recess, another non-break-through screw of bar groove Head, and the diameter ratio of the length of the slot of the non-break-through screw terminal and screw terminal is 0.5~0.6.

The utility model compared with prior art the advantages of be:

1) by flat cross recess, screw is cooperated with flat screwdriver；Simultaneously because flat cross recess is extremely A few slot is by screw terminal break-through, so also it is able to cooperate straight screwdriver；By tip cross recess, this screw can also be with point Bit screwdriver is used cooperatively, and versatility is very high；

2) since the ratio between the groove depth of flat cross recess and groove width are 0.6~0.7, and the groove width and screw terminal of flat cross recess Diameter ratio be 0.15~0.16, so that the size that occupies of the flat cross recess on screw terminal is defined, and this ratio Flat flight when cooperating flat screwdriver, notch is not easy feather plucking, and the torque being subject to is sufficient to make screw to turn.

Detailed description of the invention

Fig. 1 is the screw axonometric schematic diagram of embodiment；

Fig. 2 is the screw top view of embodiment；

Fig. 3 is the A-A schematic diagram of Fig. 2；

Fig. 4 is the B-B schematic diagram of Fig. 2.

In figure, 1, screw rod；2, screw terminal；31, through slot；311, the first rounding；312, the second rounding；32, end socket slot；4, sharp Head cross recess.

Specific embodiment

It is described in further detail with reference to the accompanying drawing and by specific embodiment to utility model, following embodiment only describes Property, it is not restrictive the protection scope of the utility model.

Embodiment

A kind of screw referring to attached drawing 1-4, including has externally threaded screw rod 1, and the cylinder being wholely set with screw rod 1 The screw terminal 2 of shape.Be provided on screw terminal 2 with bottle opener cooperation slot, including slot bottom in a plane flat cross recess and Tip cross recess 4 of the flat cross recess slot bottom to lower recess is set.

Flat cross recess therein includes the through slot 31 of both ends break-through and the end socket slot 32 of both ends not break-through.Pass through through slot 31 may be implemented the cooperation of screw terminal 2 Yu straight screwdriver, by end socket slot 32, then can limit and the screw in the present embodiment It is first 2 cooperation tack Phillips screwdrivers size, will not make the tack Phillips screwdriver of oversized dimensions turn screw when It waits, the destruction to screw terminal 2.And the diameter ratio of the length of end socket slot 32 and screw terminal 2 is 0.5~0.6, under this ratio, So that the flathead screwdriver cooperated with screw terminal 2 will not easily destroy screw terminal 2, the covert structure for improving screw terminal 2 Intensity.The groove depth and the ratio between groove width of flat cross recess are 0.6~0.7 simultaneously, and the groove width of flat cross recess and screw terminal 2 is straight The ratio between diameter is 0.15~0.16, so that the size that occupies of the flat cross recess on screw terminal 2 is defined, and this ratio is flat For bottom flight when cooperating flat screwdriver, notch is not easy feather plucking, and the torque being subject to is sufficient to make screw to turn.

On the other hand, the intersection of through slot 31 and screw terminal 2 is provided with the first fillet 311, in through slot 31 and end socket slot 32 cross intersection is provided with the second fillet 312, and then reduces the risk that screw terminal 2 hurts hand.

Under normal conditions, when pointed screw knife and tip cross recess cooperate, be very easy to skid so that screw terminal 2 by It destroys.Here the groove width of tip cross recess 4 is less than flat cross recess, on the one hand will not influence the structure of flat cross groove location Intensity, on the other hand due to small size tip cross recess 4, when cooperating pointed screw knife, pointed screw knife can to it The torque of offer is limited, reduces when twisting pointed screw knife, destroys the probability of screw terminal 2；Mix the slot of tip cross recess 4 Deep the ratio between with groove width is 3: 9~3: 10 this limited proportion, when using Phillips screwdriver, can be more as far as possible make knife Head enters in tip cross recess 4, and when tip 4 stress of cross recess under this ratio, it is broken that screw terminal 2 is not likely to produce structure It is bad.

The above is only the preferred embodiment of the utility model, and the protection scope of the utility model is not limited merely to Above-described embodiment, technical solution belonging to the idea of the present invention belong to the protection scope of the utility model.It should refer to Out, for those skilled in the art, it is without departing from the principle of the utility model it is several improvement and Retouching, these improvements and modifications also should be regarded as the protection scope of the utility model.

Claims (6)

1. a kind of screw, including with externally threaded screw rod and the screw terminal being wholely set with screw rod, which is characterized in that described Screw terminal is provided with the flat cross recess that bottom is a flat surface, and at least one slot of the flat cross recess is by the both ends of screw terminal Break-through is recessed inwardly centered on the crosspoint of the flat cross recess and is provided with tip cross recess, the groove width of tip cross recess Less than the groove width of flat cross recess.

2. a kind of screw according to claim 1, which is characterized in that the ratio between the groove depth of the flat cross recess and groove width are 0.6~0.7, and the diameter ratio of the groove width of flat cross recess and screw terminal is 0.15~0.16.

3. a kind of screw according to claim 1, which is characterized in that the ratio between the groove depth of the tip cross recess and groove width are 3: 9~3: 10.

4. a kind of screw according to claim 1, which is characterized in that the flat cross recess is by the trough rim of screw terminal break-through It is rounded down.

5. a kind of screw according to claim 1, which is characterized in that the screw terminal is a cylindrical body.

6. a kind of screw according to claim 1, which is characterized in that a wherein bar groove break-through spiral shell for the flat cross recess Silk head, another non-break-through screw terminal of bar groove, and the diameter ratio of the length of the slot of the non-break-through screw terminal and screw terminal be 0.5~ 0.6。