200912419 九、發明說明： 【發明所屬之技術領域】 本發明係一種稜鏡組件固定裝置，例如一種設置在成 像系統中的稜鏡組件固定裝置。 【先前技術】 第1圖顯示一個設置在投影系統（1 0 0)內的稜鏡組件 (1 04)。稜鏡組件（1 04)的作用是將來自光源（未繪出）的光線 (102)偏轉到一個光學元件上，例如偏轉到光閥（1〇8)上。光 ί 閥（108)會在反射光線時將圖像訊息灌輸到入射光（106) 中。被反射的光線（1 1 0)會重新通過稜鏡組件（1 04)並產生圖 像。 稜鏡組件（104)包括一個第一稜鏡元件（114)及一個二 稜鏡元件（1 16)。稜鏡元件（1 14，1 16)沿著一個斜面被固定 (例如以黏著方式固定）1且彼此相隔一定的間距，因此二 者之間有形成一道氣隙。光線（102)以一個入射角度照射在 第一稜鏡元件（114)與氣隙相鄰的面上，而且這個入射角度 、 大於全反射的臨界角度。因此光線（1 02)會在第一稜鏡元件 (114)的這個面上被全部反射，並傳播到光閥（108)。被光閥 (1 08)反射的光線（1 1 0)以一個入射角度照射在稜鏡元件 (114，116)形成氣隙的臨界面上，這個入射角度小於全反射 的臨界角度。因此光線（110)會通過稜鏡元件（Π6)。 稜鏡組件（1 04)在成像系統（例如投影機）中的定位是非 常重要的。稜鏡組件（104)的固定裝置必須非常精確的將稜 鏡組件（1 0 4)固定在正確的位置及方向上，成像系統才能產 200912419 生不受千擾的圖像。尤其是在第1圖的結構中，稜鏡組件 不能相對於光線（1 02)向上或向下移動，也不能搖晃或沿著 光線（102)的光學軸向旁邊移動。 爲了形成氣隙，組成稜鏡組件（1 0 4 )的稜鏡元件（1 1 4， i 1 6)僅在若干很小的黏著點上彼此黏著，而且由於稜鏡組 件（104)通常是被放置在溫度變化很大及經常發生振動的環 境中使用，因此稜鏡組件（104)的固定裝置必須滿足非常複 雜的要求。必須避免有任何非必要的應力或壓力作用在黏 著點上。尤其是固定裝置不能產生任何可能導致鏡元件 (1 14，1 16)彼此發生位移的壓力。 根據現有技術的一種配置方式，稜鏡組件（1 〇 4)在固定 裝置上被兩個金屬弓形夾固定住。金屬弓形夾有時會造成 稜鏡受損。另外一個缺點是會幅外增加一個組裝步驟。 對商業產品言，成本及重量扮演很重要的角色。因此 盡可能減少固定裝置包含的零件數量。固定裝置最好是澆 鑄件，而且是以重量輕且成本低廉的材料製成。 因此需要一種僅由少數幾個易於製造的零件構成的固 定稜鏡組件用的固定系統，這個系統不但能夠將稜鏡組件 的位置固定住’而且所產生的可能導致組成稜鏡組件之稜 鏡元件彼此發生位移的作用力非常小。 【發明內容】 本發明的目的是提出一種稜鏡組件用的固定系統，這 個系統不但能夠將稜鏡組件的位置固定住，而且所產生的 可能導致組成稜鏡組件之稜鏡元件彼此發生位移的作用力 200912419 非常小。 爲了達到上述目的，本發明提出的作法是使第一稜鏡 元件（也稱爲下方稜鏡元件）的寬度大於第二稜鏡元件（也稱 爲上方稜鏡元件），因而形成從第二稜鏡元件上方向外突出 的傾斜凸緣。這些傾斜的凸緣會承擔由一個將稜鏡組件固 定在定位上弓形夾所產生的大部分壓力。 弓形夾的傾斜內支撐面平行於第一稜鏡元件的凸緣。 弓形夾的內壁帶有空隙，且內壁具有方向朝下的止動元 件。在使用時，這些止動元件會對第一稜鏡元件形成的凸 緣施加壓力。 弓形夾之上側壁比下側壁窄。弓形夾之上側壁及頂部 會與上方稜鏡元件匹配，以防止其滑脫。但是弓形夾並不 會對上方稜鏡元件施以持續不變的壓力。從上側壁向下突 出的定位元件之間的間距小於下側壁之間的間距’而下方 空隙之間則具有一較大的間距。這個較大的間距相當於下 側壁之間的間距。 【實施方式】 第2圖顯示稜鏡組件（204)及本發明之固定裝置（括一 片基板（202)及一個弓形夾（206))的爆炸圖。稜鏡組件（204) 包括一個上方稜鏡元件（214)及一個下方稜鏡元件（216)。由 於下方稜鏡元件的寬度大於上方稜鏡元件，因而形成突出 於上方稜鏡元件（2 14)之外的傾斜凸緣（23 2)。例如棱鏡元件 (214)的寬度爲34mm，下方稜鏡元件（216)的寬度爲37mm， 這樣就會在稜鏡元件的兩邊各形成一道寬度均爲1.5mm的 200912419 凸緣。從第3圖顯示的稜鏡組件（204)的俯視圖可以清楚的 看出這個情況。爲了讓人看清楚凸緣的存在，第3圖中的 稜鏡組件（204)並非按照正確的比例繪製，而是將下方棱鏡 元件（2 1 6)畫得特別寬。凸緣（2 3 2)是稜鏡組件（2 0 4)的一個重 要特徵，因爲稜鏡組件（204)是以這個部分承受弓形夾（206) 施加的作用力。 從第2圖可以看出，弓形夾（206)具有一個平行於下方 棱鏡元件（21 6)之傾斜凸緣（2 3 2 )的內支撐面（224)。弓形夾 (206)還具有帶有止動元件（228)的空隙（226)。止動元件 (22 8)是從上方空隙（226)向下突出。止動元件（22 8)會形成弓 形夾（206)及稜鏡組件（204)之間的接觸。 第4圖顯示弓形夾（206)的一個簡化的背視圖，爲了簡 化圖面起見，第2圖中的環箍（218)並未在第4圖中繪出。 第5圖顯示弓形夾內壁的一個簡化的內視圖。第4圖及第 5圖是從不同的視角描繪支撐面（224)、空隙（226)(在第4圖 中看不到）、以及止動元件（228)的結構。第6圖描繪的是組 裝好的具有固定裝置的稜鏡系統。 在使用上支撐面（224)可能會因爲空隙（226)略微彎曲 的關係而對稜鏡組件施加輕微的向下及側向（在第2圖中爲 向左）的壓力。這是因爲弓形夾（206)是安裝在基板（202) 上，因而使止動元件（228)壓迫下方稜鏡元件的傾斜凸緣 (2 3 2)的關係。在第2圖的實施方式中，弓形夾的固定法蘭 (234)和基板的連接點（236)閉鎖在一起。將定位銷（238)插入 定位孔（240)可以產生更進一步的穩定作用。 200912419 上側壁（220)之間的間距小於下側壁（222)之間的間 距。雖然上側壁（220)不會有接觸壓力作用在上方稜鏡元件 (214)上，但是上側壁（220)和環箍（218)會與上方稜鏡元件 (2 14)匹配，以保護及防止上方稜鏡元件（2 14)滑脫。從上側 壁（220)突出的止動元件（22 8)之間的間距和上側壁（220)之 間的間距一樣大，而下方空隙（226)之間的間距則和下側壁 (222)之間的間距一樣大。 基板（202)包括位於前面的背面固定臂（2 12)及側導板 (2 10)。由於弓形夾（206)將稜鏡組件（204)壓向背面固定臂 (2 12)的方向，因此稜鏡組件（204)既不會往背面固定臂（212) 的方向滑脫，也不會從背面固定臂（2 12)滑開。側導板（210) 的作用是防止稜鏡組件（204)在基板（202)上轉動或是向旁 邊滑脫。由於弓形夾（206)也會向下壓迫稜鏡組件（204)，因 此稜鏡組件（2 04)也不會向上或向下滑脫。 第2圖的實施方式具有一個澆鑄的透鏡（208)及固定該 透鏡的固定臂（230)。過這部分僅屬於選擇性配備。由於只 需一個澆鑄件（弓形夾（206))就可以將透鏡（208)及稜鏡組件 固定殺基板（202)上，因此第2圖的實施方式是一種非常有 利的實施方式。 此處要特別指出的是，在說明部分及申請專利範圍中 所謂的”上方”及”下方”僅是配合圖式中元件位置的上下關 係所應用的字眼，但是並沒有對系統中各元件的定位或方 向有任何限制。例如，兩個稜鏡元件也可以是左右並排在 一起’或是將圖式中繪製在上方的稜鏡元件設置在下方。 200912419 【圖式簡單說明】 第1圖：以示意方式顯示一使用現有技術之具有稜鏡 組件的投影機的側視圖。 第2圖·—個稜鏡組件及本發明之固定裝置的爆炸圖。 第3圖：如第2圖之稜鏡組件的俯視圖。 第4圖：如第2圖之弓形夾的背視圖。 第5圖：如第2圖之弓形夾內壁的側視圖。 桌6圖：一個棱鏡組件及本發明之固疋裝置在組裝完 成後的立體圖。 【主要元件符號說明】 以下列出在圖式及說明中提及之元件符號及其所代表 的元件 0 100 投影機 102 光線 104 稜鏡組件 106 被第一稜鏡元件反射的光線 108 光閥 110 被光閥反射的光線 112 圖像 1 14 第一（上方）稜鏡元件 116 第二（下方）稜鏡元件 202 基板 204 稜鏡組件 206 弓形夾 200912419 208 透 鏡 210 基 板 上 的 側 導 板 212 基 板 上 的 背 面 固 定 臂 214 上 方 稜 元 件 216 下 方 稜 元 件 218 將 上 方 稜 鏡 元 件 箍 住 的 弓形夾環箍 220 弓 形 夾 的 上 側 壁 222 弓 形 夾 的 下 側 壁 224 弓 形 夾 的 傾 斜 內 支 撐 面 226 弓 形 夾 的 空 隙 228 弓 形 夾 空 隙 的 止 動 元 件 230 固 疋 透 鏡 用 的 固 定 臂 232 下 方 稜 鏡 元 件 的 傾 斜 凸 緣 234 弓 形 夾 的 固 定 法 蘭 236 基 板 的 連 接 點 238 基 板 上 的 定 位 銷 240 弓形夾之固定法蘭上的定位孔200912419 IX. Description of the Invention: [Technical Field] The present invention is a cymbal assembly fixing device such as a cymbal assembly fixing device provided in an image forming system. [Prior Art] Fig. 1 shows a 稜鏡 component (104) set in the projection system (1 0 0). The purpose of the 稜鏡 assembly (104) is to deflect light (102) from a source (not shown) onto an optical component, such as a light valve (1〇8). The light ί valve (108) injects image information into the incident light (106) as it reflects light. The reflected light (1 1 0) will re-pass the 稜鏡 component (104) and produce an image. The weir assembly (104) includes a first weir element (114) and a two weir element (1 16). The weir elements (1, 1 16 16) are fixed (e.g., adhesively fixed) 1 along a slope and spaced apart from one another so that an air gap is formed between the two. The light (102) is incident on the face of the first weir element (114) adjacent to the air gap at an incident angle, and this angle of incidence is greater than the critical angle of total reflection. Therefore, the light (102) is totally reflected on this face of the first weir element (114) and propagates to the light valve (108). The light (1 1 0) reflected by the light valve (108) is incident on the critical surface of the air gap formed by the 稜鏡 element (114, 116) at an incident angle, which is smaller than the critical angle of total reflection. Therefore, the light (110) will pass through the 稜鏡 element (Π6). The positioning of the 稜鏡 component (104) in an imaging system (such as a projector) is very important. The fixture of the 稜鏡 assembly (104) must be very precise in fixing the prism assembly (1 0 4) in the correct position and orientation, and the imaging system can produce images that are not disturbed by the 200912419. In particular, in the configuration of Fig. 1, the cymbal assembly cannot move up or down relative to the ray (102), nor can it be shaken or moved alongside the optical axis of the ray (102). In order to form an air gap, the 稜鏡 element (1 1 4, i 1 6) constituting the 稜鏡 component (104) adheres to each other only at a few small adhesion points, and since the 稜鏡 component (104) is usually The placement is used in environments where the temperature varies greatly and vibrations often occur, so the fixture of the crucible assembly (104) must meet very complex requirements. Any unnecessary stress or pressure must be avoided at the point of adhesion. In particular, the fixing means cannot produce any pressure which may cause the mirror elements (1, 1 16) to be displaced from each other. According to one configuration of the prior art, the jaw assembly (1 〇 4) is held by the two metal clips on the fixture. Metal clips can sometimes cause damage to the file. Another disadvantage is the addition of an assembly step. It plays an important role in commercial products, cost and weight. Therefore, the number of parts included in the fixture is reduced as much as possible. The fixture is preferably cast and is made of a lightweight and cost effective material. There is therefore a need for a fastening system for a fixed jaw assembly that consists of only a few easy-to-manufacture parts that not only fix the position of the jaw assembly, but also the resulting components that may result in the assembly of the jaw assembly. The forces that are displaced from each other are very small. SUMMARY OF THE INVENTION It is an object of the present invention to provide a fixing system for a cymbal assembly which not only fixes the position of the cymbal assembly, but also which may cause displacement of the cymbal components constituting the cymbal assembly. The force 200912419 is very small. In order to achieve the above object, the present invention proposes to make the width of the first 稜鏡 element (also referred to as the lower 稜鏡 element) larger than the second 稜鏡 element (also referred to as the upper 稜鏡 element), thus forming a second ridge An inclined flange that protrudes outwardly above the mirror element. These slanted flanges will bear most of the pressure generated by a truss assembly that is positioned to position the clevis. The inclined inner support surface of the clip is parallel to the flange of the first jaw element. The inner wall of the clip has a gap and the inner wall has a stop element that faces downward. In use, these stop elements exert pressure on the flange formed by the first jaw element. The upper side of the bow is narrower than the lower side wall. The upper side and top of the clip will match the upper jaw element to prevent it from slipping off. However, the clip does not exert a constant pressure on the upper jaw element. The spacing between the positioning elements projecting downwardly from the upper side wall is smaller than the spacing between the lower side walls and there is a larger spacing between the lower spaces. This larger spacing corresponds to the spacing between the lower sidewalls. [Embodiment] Fig. 2 shows an exploded view of the crucible assembly (204) and the fixing device of the present invention (including a substrate (202) and a bow clamp (206)). The weir assembly (204) includes an upper weir element (214) and a lower weir element (216). Since the width of the lower jaw element is larger than the upper jaw element, an inclined flange (23 2) protruding beyond the upper jaw element (2 14) is formed. For example, the prism element (214) has a width of 34 mm and the lower jaw element (216) has a width of 37 mm, so that a 200912419 flange having a width of 1.5 mm is formed on both sides of the 稜鏡 element. This can be clearly seen from the top view of the 稜鏡 component (204) shown in Figure 3. In order to make it clear that the flange is present, the 稜鏡 component (204) in Figure 3 is not drawn to the correct scale, but the lower prism element (2 16) is drawn particularly wide. The flange (23 2) is an important feature of the 稜鏡 assembly (204) because the 稜鏡 assembly (204) is the force applied by this portion to the bow clamp (206). As can be seen from Figure 2, the clip (206) has an inner support surface (224) that is parallel to the angled flange (23 2) of the lower prism element (126). The clip (206) also has a void (226) with a stop element (228). The stop member (22 8) projects downward from the upper gap (226). The stop element (22 8) will form a contact between the bow clamp (206) and the jaw assembly (204). Figure 4 shows a simplified rear view of the clip (206). The hoop (218) of Figure 2 is not depicted in Figure 4 for the sake of simplicity. Figure 5 shows a simplified internal view of the inner wall of the clip. 4 and 5 are views showing the structure of the support surface (224), the gap (226) (not visible in Fig. 4), and the stopper member (228) from different angles of view. Figure 6 depicts a assembled raft system with fixtures. The use of the upper support surface (224) may exert a slight downward and lateral (leftward in Figure 2) pressure on the jaw assembly due to the slightly curved relationship of the gap (226). This is because the clip (206) is mounted on the base plate (202), thereby causing the stop member (228) to compress the inclined flange (23 2) of the lower jaw member. In the embodiment of Fig. 2, the fixing flange (234) of the clip and the connection point (236) of the substrate are latched together. Inserting the locating pin (238) into the locating hole (240) can result in further stabilization. 200912419 The spacing between the upper sidewalls (220) is less than the spacing between the lower sidewalls (222). Although the upper side wall (220) does not have contact pressure acting on the upper weir element (214), the upper side wall (220) and the hoop (218) will match the upper weir element (2 14) to protect and prevent The upper jaw element (2 14) slips off. The spacing between the stop elements (22 8) projecting from the upper side wall (220) is as large as the spacing between the upper side walls (220), and the spacing between the lower gaps (226) and the lower side walls (222) The spacing between them is the same. The substrate (202) includes a front fixed arm (2 12) and a side guide (2 10). Since the clip (206) presses the cymbal assembly (204) in the direction of the rear fixed arm (2 12), the cymbal assembly (204) does not slip in the direction of the rear fixed arm (212) nor Slide off from the rear fixed arm (2 12). The side guide (210) serves to prevent the cymbal assembly (204) from rotating on the base plate (202) or slipping sideways. Since the clip (206) also presses the jaw assembly (204) downwards, the jaw assembly (204) does not slide up or down. The embodiment of Figure 2 has a cast lens (208) and a fixed arm (230) that secures the lens. This part is only optional. Since the lens (208) and the cymbal assembly can be fixed to the substrate (202) by only one casting member (the bow clamp (206)), the embodiment of Fig. 2 is a very advantageous embodiment. It is to be noted that the terms "above" and "below" in the description and the scope of the patent application are only the words applied in conjunction with the relationship of the position of the elements in the drawings, but not for the components in the system. There are any restrictions on positioning or orientation. For example, the two 稜鏡 elements can also be side by side and ‘arranged’ or the 稜鏡 element drawn above in the drawing can be placed below. 200912419 [Simplified description of the drawings] Fig. 1 is a schematic side view showing a side view of a projector having a 稜鏡 component using the prior art. Fig. 2 is an exploded view of a cartridge assembly and a fixture of the invention. Figure 3: Top view of the assembly of Figure 2 as shown in Figure 2. Figure 4: Rear view of the bow clip as in Figure 2. Figure 5: Side view of the inner wall of the bow clip as in Figure 2. Table 6 is a perspective view of a prism assembly and the fixing device of the present invention after assembly. [Main component symbol description] The following describes the component symbols mentioned in the drawings and descriptions and the components they represent. 0 100 Projector 102 Light 104 稜鏡 Component 106 Light ray 108 reflected by the first 稜鏡 element Light valve 110 Light 112 reflected by the light valve Image 1 14 First (upper) 稜鏡 element 116 Second (lower) 稜鏡 element 202 Substrate 204 稜鏡 Assembly 206 Bow clamp 200912419 208 Lens 210 Side guide 212 on the substrate Rear fixed arm 214 upper edge element 216 lower edge element 218 upper clip side hoop hooping the upper 稜鏡 element 220 upper side wall 222 of the bow clip lower side wall 224 of the bow clip inclined inner support surface 226 of the bow clip gap of the bow clip 228 Locking element of the clip-shaped gap 230 Fixing arm 232 for the fixing lens Lowering flange 234 of the lower part of the yoke Fixed flange 236 of the bow-shaped clip 236 Connection point of the substrate 238 Positioning on the substrate Pin 240 positioning hole on the fixing flange of the clip