Background technology
In communication engineering, use various drum type brake cable splice closures through regular meeting.For base and the outer cover that makes cable splice closure is sealed and matched, to use a kind of tight locking button clamp mechanism that both are fastened togather usually.
At present, modal a kind of tight locking button clamp mechanism is made of two anchor ear portions that are the semicircular ring shape, and the two ends homogeneous phantom of each anchor ear portion is shaped on flange part, all offers through hole on each flange part.When the base of needs engagings cable splice closure and outer cover, by fasteners such as screw, bolts two anchor ear portions are linked together, to reach the purpose that is locked and fastened.Yet there is following some tangible deficiency in this tight locking button clamp mechanism: (1) causes the sealing property of this tight locking button clamp mechanism unsatisfactory because steel is different with the shrinkage factor of plastics; (2) owing to need tool using when fastener is installed, so its operation is convenient inadequately, and the cost of opening outer cover repeatedly is also too high; (3) because fastener is made of metal, therefore exists high pressure to cause the destruction of housing and cable connection, even cause the mishap of personal injury.
For this reason, multiple improved tight locking button clamp mechanism has also appearred on the market.For example, in Chinese invention patent No.96194851.5, disclosed a kind of first and second parts and be latched in together the center of crossing blocking device an object, it comprises a lever on the arm that is connected to a first that is installed in object pivotally, and a free end of this lever has a composition surface that engages with the second portion of object.Lever has a length direction along lever and extends to extension outside the composition surface on its free end.Compare with original tight locking button clamp mechanism, the inconvenient defective of clamp mechanism dismounting though the traditional locks that overcome the blocking device that this patent discloses links closely, but because it only relies on lever and extension to carry out lock operation, and do not have to be provided with the structure that makes blocking device keep blocking, so still there is fastening insecure defective in this blocking device.
For this reason, be badly in need of a kind of easy to operate, fastening tight locking button clamp mechanism reliable and with low cost at present.
The utility model content
The purpose of this utility model is to provide a kind of easy to operate, fastening tight locking button clamp mechanism reliable and with low cost.
Tight locking button clamp mechanism of the present utility model is made of one first anchor ear portion that is the semicircular ring shape and one second anchor ear portion, the first anchor ear portion and the second anchor ear portion have a stiff end and a free end respectively, all stiff ends link together pivotly, and the free end of the first anchor ear portion is equipped with a hasp arm pivotly, the center section of hasp arm is equipped with a hasp pivotly, and the free end of the second anchor ear portion is provided with a buckling parts that cooperates with hasp.
Preferably, the distal portions of hasp arm is provided with a locking device, and this locking device locks mutually with tab portion on the correspondence position that is arranged on the second anchor ear portion.
More preferably, locking device is a projection, and tab portion is provided with one and holds this protruding opening.
Preferably, the end face with the hasp of buckling parts contact matching is formed with striped.
Preferably, the inside edge of the first anchor ear portion and the second anchor ear portion offers an annular groove, and the upper and lower side of this annular groove forms the inclined-plane.
Preferably, hasp arm and hasp have the crooked radian that adapts with anchor ear portion.
Compare with traditional tight locking button clamp mechanism, the operation of tight locking button clamp mechanism of the present utility model is more easy, reasonable, and the cost of installation and removal is very cheap.In addition, because this tight locking button clamp mechanism also is provided with the structure that engage with anchor ear portion, so can prevents that the tight locking button clamp mechanism from meeting accident and come off, and increase fastening reliability.
Embodiment
Below with reference to description of drawings preferred embodiment of the present utility model, wherein identical label is represented identical member.
At first see also Fig. 1, this figure is the planimetric map of tight locking button clamp mechanism of the present utility model.This tight locking button clamp mechanism is made of one first anchor ear portion 1 that is the semicircular ring shape and one second anchor ear portion 2, and two anchor ear portions 1,2 can constitute the circular space of a sealing in closing up, and is fastened togather with base and outer cover with cable splice closure.Yet those skilled in the art should be understood that anchor ear portion is not limited to the semicircular ring shape, as long as its shape adapts with the shape of the cable splice closure that cooperates to be sealed.
The first anchor ear portion 1 and the second anchor ear portion 2 have a stiff end 1a, 2a and a free end 1b, 2b respectively, wherein, stiff end 1a, the 2a of the first anchor ear portion 1 and the second anchor ear portion 2 links together pivotly by a connecting pin 8 or similar device, and free end 1b, the 2b of the first anchor ear portion 1 and the second anchor ear portion 2 can do the rotation of 180 degree around connecting pin 8.
The free end 1b of the first anchor ear portion 1 is equipped with one first pin, 6, one hasp arms 3 and is pivotably mounted in the first anchor ear portion 1 by first pin 6.As shown in Figure 1, this hasp arm 3 preferably is three sections curved shapes, thereby fits with the arc-shaped surface of the first anchor ear portion 1 as much as possible, to reduce the shared space of this tight locking button clamp mechanism.Distal portion at this hasp arm 3 is provided with a locking projections 10, when hasp arm 3 during near the first anchor ear portion 1, this locking projections 10 just in time is positioned at a tab portion 9 places of the corresponding position that is arranged on the first anchor ear portion 1, offer an opening that holds locking projections 10 on this tab portion 9, so that the state that hasp arm 3 keeps near the first anchor ear portion 1.
As shown in Figure 1, the center section of hasp arm 3 is equipped with one second pin 2, thereby a hasp 4 is connected on the hasp arm 3 pivotly.Hasp 4 mainly is made of the head of a shank with an inside vertical projection, that is to say that it is hook-shaped that hasp 4 roughly is.Those skilled in the art can make the two-part curve form with the hasp shank according to the concrete shape of tight locking button clamp mechanism, to dwindle the shared space of tight locking button clamp mechanism as much as possible.
Free end 2b place in the second anchor ear portion 2 is provided with a buckling parts 5, this buckling parts 5 offers the groove 5a that the nose shape with hasp 4 adapts in its surface back to the free end 2b of the second anchor ear portion 2, so that near in the process of the first anchor ear portion 1, the head of hasp 4 is remained among the groove 5a of buckling parts 5 at hasp arm 3.
In addition, on the head end of hasp 4, form striped,, increase friction force between the two so that the time with the groove 5a contact matching of buckling parts 5.
Need to prove that also can adopt the locking mechanism of other type to replace locking projections in the foregoing description, these alternative mechanism also should be included in the protection domain of the present utility model.
See also Fig. 2 and 2a, the inside edge of the first anchor ear portion 1 and the second anchor ear portion 2 offers an annular groove 11, and the cross section of this annular groove 11 takes the shape of the letter U, so that under the prerequisite of not damaging anchor ear portion intensity, saves the manufacturing cost of tight locking button clamp mechanism as much as possible.Shown in Fig. 2 a, the upper and lower side of annular groove 11 is formed with certain gradient, this gradient can adapt with the base of cable splice closure and the inclined-plane on the outer cover, axial engaging power is converted into engaging power radially, further increases the sealing effectiveness of tight locking button clamp mechanism.In addition, also can engage the angle of friction that the object surfaces friction factor calculates this material, and the gradient of the upper and lower side of annular groove 11 is set to be slightly less than this angle of friction according to waiting.When tight locking button clamp mechanism during for locking state, tight locking button clamp mechanism and object to be engaged are in self-locking state, thereby guarantee that the tight locking button clamp mechanism has better locking effect.
Introduce the operation steps of installation and removal tight locking button clamp mechanism of the present utility model below in conjunction with Fig. 3 a-3c.
At first see also Fig. 3 a, the annular groove 11 of the second anchor ear portion 2 by the tight locking button clamp mechanism is fastened togather the base and the outer cover of cable splice closure, rotate the first anchor ear portion 1 then, so that two anchor ear portions close up gradually and surround cable splice closure (cable splice closure among the figure is omitted).Then, rotate hasp arm 3, and the head that makes hasp 4 is fastened among the groove 5a of buckling parts 5, with the head of hasp 4 as the strong point, with hasp arm 3 as lever, hasp arm 3 is moved towards the direction near the first anchor ear portion 1, and the second anchor ear portion 2 forms the space of a sealing gradually with the first anchor ear portion 1 under the snap action of hasp 4 and buckling parts 5 simultaneously.When the head of hasp, when first pin and second is sold in line, the first anchor ear portion and the second anchor ear portion promptly are in closure state, and with wherein the base and the outer cover of cable splice closure are fastened togather (Fig. 3 b).At last, continue to make the hasp arm to move, make the tight locking button clamp mechanism realize the function of self-locking towards direction near the first anchor ear portion.The locking projections 10 of hasp arm 3 far-ends is contained in the opening of tab portion 9, so that the state (Fig. 3 c) that hasp arm 3 keeps near the first anchor ear portion 1.
When dismounting tight locking button clamp mechanism of the present utility model, at first make the locking projections 10 of hasp arm 3 leave the opening of tab portion 9, and make the head of hasp 4 leave the groove 5a of buckling parts 5.Sell 7 as the strong point with second then, hasp 4 hasp 4 is moved towards the direction near the first anchor ear portion 1, and cable splice closure leaves in the first anchor ear portion 1 that drives by this as lever.Thus, can make things convenient for and take off the tight locking button clamp mechanism at low cost.
Though below in conjunction with the embodiments the structure and the operation steps of tight locking button clamp mechanism of the present utility model have been done to further specify, but those of ordinary skill in the art will be appreciated that, the foregoing description only is used for illustrating, and can not be as to restriction of the present utility model, therefore, can carry out modification to embodiment in connotation scope of the present utility model, these modification comprise: can make the member of hasp arm and hasp pivoting action replace first pin of the present utility model and second pin with other; With having other shape but the member that possesses the function of hasp of the present utility model replaces hasp of the present utility model; Replace circular anchor ear of the present utility model portion or the like with oval or roughly rounded anchor ear portion.They all will drop within the scope of claims of the present utility model.