CN1847899A

CN1847899A - Barrel combination with cam mechanism and lens combination

Info

Publication number: CN1847899A
Application number: CN200510064263.XA
Authority: CN
Inventors: 周宗陵; 王敏鸿
Original assignee: Asia Optical Co Inc
Current assignee: Asia Optical Co Inc
Priority date: 2005-04-12
Filing date: 2005-04-12
Publication date: 2006-10-18

Abstract

The barrel-lens combination with cam mechanism includes one first barrel and one second barrel sleeve connected mutually, and one outer lens tube, one inner lens tube, and one lens unit. Each of the first barrel and the outer lens tube has several cam slots extending corresponding to one axis; each of the second barrel and the inner lens tube has one tubular body, several shafts fixed to the tubular body and several rolling parts with spindle on the shaft and spherical surface each. Owing to the point contact between the spherical surface and the cam slot wall, low friction and smooth motion may be reached between the second barrel and the inner lens tube and the first barrel and the outer lens tube.

Description

The barrier part group and the lens group of tool cam mechanism

Technical field

The present invention relates to a kind of optical equipment, particularly relate to barrier part group and lens group that a kind of barrier part that makes two mutual sockets produces the tool cam mechanism of displacement with cam mechanism.

Background technology

As shown in Figure 1 and Figure 2, existing a kind of lens group includes the unit, mirror cell 2 that a lens barrel 1 and is installed in lens barrel 1 inside.Lens barrel 1 has one and centers on the perisporium 102 that an axis L1 also can define a room 101, the first end 103, one that perisporium 102 has corresponding axis L1 one end is the second end 104 of opposite setting and most with first end 103 and extends to the cam path 105 of the second end 104 in a spiral manner by first end 103, and each brings aforementioned cam path 105 face 107 together by two trough wall surfaces that extend in parallel 106 and two and constituted.Unit, mirror cell 2 is to be installed in movably in the room 101 of lens barrel 1 along axis L1, and have in the form of a ring body 201, most axle part 202, most shafts that are fixed on body 201 1 outer ring surfaces and be located at cylinder 203 on each part 202 and most sheet are located at body 201 inside along axis L1 group eyeglass 204, cylinder 203 is hollow cylindrical, and has one and can be the outer peripheral face 203 ' that wire contacts with trough wall surface 106.

Though, utilize cylinder 203 to be set in a part 202 outsides, can make unit, mirror cell 2 when axis L1 produces displacement with respect to lens barrel 1, reach the purpose of slide guide.But, under normal condition, cylinder 203 is wire with trough wall surface 106 and contacts, contact area is big, friction force is also big, and as shown in Figure 3, when 202 windings of axle spare on the outer ring surface of body 201, produce crooked, and when causing cylinder 203 also to be crooked the setting, friction force in the time of then can increasing cylinder 203 and roll with trough wall surface 106, and can produce interferences, generation is beated and influence the mobile sliding compliance of unit, mirror cell 2.

Summary of the invention

A purpose of the present invention is to provide a kind of most rolling members of one second barrier part that make to contact with point-like with most cam path trough wall surfaces of one first barrier part, and the power of can reducing friction, and can make second barrier part produce the barrier part group of smooth and easy mobile tool cam mechanism with respect to first barrier part.

Another object of the present invention is to provide a kind of most rolling members of an inner lens cone that make to contact with point-like with most cam path trough wall surfaces of an outer lens barrel, and the power of can reducing friction, and can make the inner lens cone that a lens unit is installed to produce the lens group of smooth and easy mobile tool cam mechanism with respect to outer lens barrel.

The barrier part group of tool cam mechanism of the present invention comprises one first barrier part and along an axis and first barrier part second barrier part of socket each other.First barrier part has one and centers on the perisporium that an axis is produced, the first end, one that perisporium has corresponding axis one end is the second end of opposite setting and most with first end and extends to the cam path of the second end by first end, and each face of bringing together by two trough wall surfaces that extend in parallel and two link slot walls of aforementioned cam path is constituted.Second barrier part has in the form of a ring body, most axle part, most shafts that are fixed on the body and is located at the rolling member on each part, the aforementioned axis part respectively has an axle that levels off to body and establishes portion and and be located at that axle is established the portion outside and the footpath is wider than the retaining edge that axle is established portion, rolling member be make spherical and respectively the axle be located at the axle establish in the portion, and kept off edge and stop spacingly, and respectively have one and be the sphere that point-like contacts with the cam path trough wall surface of lens barrel.The lens group of tool cam mechanism comprise an outer lens barrel, can be outside an axis be installed in movably inner lens cone and one group of lens unit that is located at inner lens cone inside of lens barrel inside.Outer lens barrel has one and centers on the perisporium that an axis also can define a room, the first end, one that perisporium has corresponding axis one end is the second end and most the cam paths that extended to the second end by first end of opposite setting with first end, aforementioned cam path and room interpenetrate, and each is made of two trough wall surfaces that extend in parallel and two faces of bringing together that connect two trough wall surfaces.Inner lens cone has in the form of a ring a body, most and is fixed in axle part on the body and most shafts and is located at rolling member on the part, body has an outer ring surface, the aforementioned axis part is radially to protrude out setting outwardly by outer ring surface, and respectively have an axle that levels off to outer ring surface and establish portion and and be located at that axle is established the portion outside and the footpath is wider than the retaining edge that axle is established portion, aforementioned rolling member be make spherical and the axle be located at the axle establish in the portion, and kept off edge and stop spacingly, and respectively have one and be the sphere that point-like contacts with the cam path trough wall surface of lens barrel.Lens unit has at least one eyeglass that is located at the body interior of inner lens cone along the axis group.

Whereby, rolling member is to be point-like to contact with the cam path trough wall surface, can reach to reduce contact area, reduction friction force, the purpose of beating and promoting the product precision that reduces.

Description of drawings

The present invention is described in detail below in conjunction with drawings and Examples:

Fig. 1 is the three-dimensional exploded view of existing a kind of lens group

Fig. 2 is the combination section of this kind lens group;

Fig. 3 is that the axle part of this kind lens group produces crooked synoptic diagram;

Fig. 4 is the three-dimensional exploded view of a preferred embodiment of the present invention;

Fig. 5 is the combination section of the above-mentioned preferred embodiment of the present invention;

Fig. 6 is that most fulcrum spares of the above-mentioned preferred embodiment of the present invention produce crooked synoptic diagram, illustrates that most rolling members keep point-like to contact with the trough wall surface of most cam paths.

Embodiment

As Fig. 4 and shown in Figure 5, the preferred embodiment of the barrier part group of tool cam mechanism of the present invention comprises second barrier part 20 of one

first barrier part

10 and 10 sockets of one and first barrier part.The present invention is further concrete again to use, and is that first barrier part 10 is considered as an outer lens barrel, and second barrier part 20 that is set in first barrier part, 10 inside is considered as an inner lens cone, and sets up one group of lens unit 30 that is located in second barrier part 20.

First barrier part 10 is made hollow cylindrical, and have one around an axis L2 and can define the perisporium 12 of a room 11, the first end 121, one that perisporium 12 has corresponding axis L2 one end is the second end 122 and most the cam paths 123 that are uniformly-spaced and extended to by first end 121 in a spiral manner the second end 122 of opposite setting with first end 121, aforementioned cam path 123 interpenetrates with room 11, and each is made of two trough wall surfaces that extend in parallel 124 and two faces of bringing together 125 that connect two trough wall surfaces 124.

Second barrier part 20 is to be installed in movably in the room 11 of first barrier part 10 along axis L2, and have in the form of a ring body 21, most axle part 22, most shafts that are fixed on the body 21 be located at rolling member 23 on the part 22 and most respectively lining be located at lining 24 between a part 22 and the rolling member 23.Body 21 has an outer ring surface 211 and most individual screw 212 that uniformly-spaced is arranged on the outer ring surface 211 that is.The axle part 22 of present embodiment can adopt screw, and is along radially being arranged in the screw 212 of vertical axis L2, and respectively has an axle that levels off to outer ring surface and establish portion 221 and and be located at that axle is established portion 221 outsides and the footpath is wider than the retaining edge 222 that axle is established portion 221.Aforementioned rolling member 23 is to make spherical and axle is located at axle and establishes in the portion 221 with plastic material, and is kept off edge 222 and stop spacingly, and respectively has one and is the sphere 231 that point-like contacts with cam path 123 trough wall surfaces 124 of first barrier part 10, and lining 24 is to make with copper material.

Lens unit 30 has the pressure ring 34 that two spaced rings 33 and of eyeglass 31,32, between two eyeglasses 31,32 that are located at body 21 inside along axis L2 group are arranged in eyeglass 32 1 sides.

Again as shown in Figure 5, under normal assembly situation, axle part 22 is perpendicular to the outer ring surface 211 of body 21, and the sphere 231 of rolling member 23 is point-like with trough wall surface 124 and contacts, being wire with the cylinder 203 of Fig. 1, Fig. 2 and trough wall surface 106 contacts and compares, not only contact area is little, friction force is also less, improve jumping phenomena, and then can promote the precision of unit, mirror cell 20 with respect to lens barrel 10 shift actions.

And as shown in Figure 6, on the outer ring surface 211 of axle spare 22 windings, produce crooked at body 21, and when causing rolling member 23 also to be crooked the setting, the sphere diameter of rolling member 23 can't change, still keep point-like to contact with the trough wall surface 124 of cam path 123, can solve excessive because of size difference, contact area, cause situations such as stuck, interference, and can promote the product precision.

Claims

1. the barrier part group of a tool cam mechanism comprises one first barrier part and one and first barrier part second barrier part of socket each other, it is characterized in that:

First barrier part, have one and center on the perisporium that an axis is produced, the first end, one that perisporium has corresponding axis one end is the second end of opposite setting and most with first end and extends to the cam path of the second end by first end, and each face of bringing together by two trough wall surfaces that extend in parallel and two link slot walls of aforementioned cam path is constituted;

Second barrier part, have in the form of a ring body, most axle part, most shafts that are fixed on the body and be located at the rolling member on the part, the aforementioned axis part respectively has an axle that levels off to body and establishes portion and and be located at that axle is established the portion outside and the footpath is wider than the retaining edge that axle is established portion, aforementioned rolling member be make spherical and respectively the axle be located at the axle establish in the portion, and kept off edge and stop spacingly, and respectively have one and be the sphere that point-like contacts with the cam path trough wall surface of lens barrel.

2. the barrier part group of tool cam mechanism as claimed in claim 1 is characterized in that: the cam path of first barrier part is to extend to the second end in a spiral manner by first end.

3. the barrier part group of tool cam mechanism as claimed in claim 1 is characterized in that: second barrier part also has most and serves as a contrast the lining that is located between a part and the rolling member respectively.

4. the lens group of a tool cam mechanism comprises inner lens cone and one group of lens unit that is located at inner lens cone inside that an outer lens barrel, is installed in outer lens barrel inside, it is characterized in that:

Outer lens barrel, have one and center on the perisporium that an axis also can define a room, the first end, one that perisporium has corresponding axis one end is the second end and most the cam paths that extended to the second end by first end of opposite setting with first end, cam path and room interpenetrate, and each is made of two trough wall surfaces that extend in parallel and two faces of bringing together that connect two trough wall surfaces;

Inner lens cone, be can be outside axis is installed in movably in the room of lens barrel, and has in the form of a ring a body, most are fixed in axle part on the body and most shafts and are located at rolling member on the part, body has an outer ring surface, the aforementioned axis part is radially to protrude out setting outwardly by outer ring surface, and respectively have an axle that levels off to outer ring surface and establish portion and and be located at that axle is established the portion outside and the footpath is wider than the retaining edge that axle is established portion, aforementioned rolling member be make spherical and the axle be located at the axle establish in the portion, and kept off edge and stop spacingly, and respectively have one and be the sphere that point-like contacts with the cam path trough wall surface of lens barrel;

Lens unit has at least one eyeglass that is located at the body interior of inner lens cone along the axis group.

5. the lens group of tool cam mechanism as claimed in claim 4 is characterized in that: the cam path of outer lens barrel is to extend to the second end in a spiral manner by first end.

6. the lens group of tool cam mechanism as claimed in claim 4 is characterized in that: inner lens cone also has most and serves as a contrast the lining that is located between a part and the rolling member respectively.